Alzheimer's & Cognition

Preliminary results from a population-based cohort study support previous reports that migraine is a midlife risk factor for dementia later in life, but further determined that migraine with aura and frequent hospital contacts significantly increased dementia risk after age 60 years, according to results from a Danish registry presented at the virtual annual meeting of the American Headache Society.

“The findings of this study emphasize the need for studies in the migraine-dementia pathophysiology, in particular in migraine cases with aura,” said Sabrina Islamoska, MSc, PhD, a postdoctoral researcher in the department of public health at the University of Copenhagen. “This study highlights the importance of monitoring severe migraine to potentially prevent dementia.”
 

A national register-based study

The study used Danish national register–based data from 1988 to 2017 of 1.66 million individuals born between 1935 and 1956, retrieving exposure information until age 59 years and following individuals for dementia after age 60. The matched analysis included 18,135 people registered with migraine before age 59 and 1.38 million without migraine. The matched study population was 62,578.

A diagnosis of dementia or use of dementia medications after age 60 years was the main outcome. Covariates included socioeconomic factors, psychiatric comorbidities and other headache diagnoses.

“To the best of our knowledge, no previous national register–based studies have investigated the risk of dementia among individuals who suffer from migraine with aura,” Dr. Islamoska said.

The preliminary findings revealed that the median age at diagnosis was 49 years and about 70% of the migraine population were women. “There was a 50% higher dementia rate in individuals who had any migraine diagnosis,” Dr. Islamoska said.

“We also found a 20% higher but nonsignificant dementia rate in individuals who had migraine without aura,” she said. However, when the migraine-with-aura population was evaluated, it was found to have a dementia rate two times higher than people with no migraine. “The dementia rate was higher if individuals had more frequent hospital contacts with migraine.”

The findings support the hypothesis that migraine is a midlife risk factor for dementia later in life, she said.

“The findings underline the value of investigating the effect of migraine medications in dementia risk to assess the impact of mild to moderate migraines,” Dr. Islamoska said. “Therefore, the next step is to investigate the risk of dementia among users of migraine medications who are not diagnosed with migraines at hospitals.”

Strengths of the study, Dr. Islamoska noted, were its size and national nature of its population, that it included all migraine diagnoses at hospitals over a 29-year period, that it made adjustments for confounding of well-established dementia risk factors, and that it validated dementia diagnoses after age 60 years.

One limitation was that the study only included hospital-based diagnoses of dementia while 60% of cases in Denmark are undiagnosed, “thus our results only apply to migraine that is severe enough to require a hospital contact,” Dr. Islamoska said, while most migraine cases are treated in the primary care setting.

Also, the young study population may have a lower dementia risk. “We also know that age of migraine registration may not corresponded with the actual onset, since migraine is a complex disorder with individual variation in patient’s burden and course of disease,” Dr. Islamoska said.

“Future studies are needed to understand the pathological mechanisms underlying the relationship between migraine and dementia and to investigate whether proper prophylactic treatment of migraine can potentially prevent dementia,” Dr. Islamoska said. “In addition, when investigating the association between these two prevalent neurological disorders, the timing of migraine diagnosis and dementia onset is important to ensure temporality. We took this into account in our study to strengthen the validity of our results.”
 

‘Surprising’ findings

Andrew Charles, MD, director of the Goldberg Migraine Program at the University of California, Los Angeles, said the Danish study makes an important contribution to the literature on dementia risk factors. “Vanishingly small amounts of attention have been paid to migraine as a potential risk factor,” he said. However, he called the results “surprising” based on his own clinical experience. “I actually had a sense that migraine was somehow protective against Alzheimer’s or other kinds of dementias.”

He questioned if the migraine-dementia link could be a “reporting artifact” of migraine sufferers merely going to the neurologist, raising the likelihood of a positive migraine diagnosis. Nonetheless, the results are “intriguing” and raise important questions about migraine therapy and dementia risk.

“If it holds up, it really is something that behooves us to understand whether intervening in terms of therapy for migraine has even more consequences beyond just the immediate relief of symptoms,” Dr. Charles said. “It’s something we should be thinking about in terms of preventing longer-term consequences of this disorder.”

Dr. Islamoska disclosed that Veluxfondent funded the study as part of her PhD project. Dr. Charles disclosed he is a consultant to Amgen, Biohaven Pharmaceuticals, Eli Lilly, Lundbeck, and Novartis.

SOURCE: Islamoska S et al. AHS 2020, Submission 846214.

Preliminary results from a population-based cohort study support previous reports that migraine is a midlife risk factor for dementia later in life, but further determined that migraine with aura and frequent hospital contacts significantly increased dementia risk after age 60 years, according to results from a Danish registry presented at the virtual annual meeting of the American Headache Society.

“The findings of this study emphasize the need for studies in the migraine-dementia pathophysiology, in particular in migraine cases with aura,” said Sabrina Islamoska, MSc, PhD, a postdoctoral researcher in the department of public health at the University of Copenhagen. “This study highlights the importance of monitoring severe migraine to potentially prevent dementia.”
 

A national register-based study

The study used Danish national register–based data from 1988 to 2017 of 1.66 million individuals born between 1935 and 1956, retrieving exposure information until age 59 years and following individuals for dementia after age 60. The matched analysis included 18,135 people registered with migraine before age 59 and 1.38 million without migraine. The matched study population was 62,578.

A diagnosis of dementia or use of dementia medications after age 60 years was the main outcome. Covariates included socioeconomic factors, psychiatric comorbidities and other headache diagnoses.

“To the best of our knowledge, no previous national register–based studies have investigated the risk of dementia among individuals who suffer from migraine with aura,” Dr. Islamoska said.

The preliminary findings revealed that the median age at diagnosis was 49 years and about 70% of the migraine population were women. “There was a 50% higher dementia rate in individuals who had any migraine diagnosis,” Dr. Islamoska said.

“We also found a 20% higher but nonsignificant dementia rate in individuals who had migraine without aura,” she said. However, when the migraine-with-aura population was evaluated, it was found to have a dementia rate two times higher than people with no migraine. “The dementia rate was higher if individuals had more frequent hospital contacts with migraine.”

The findings support the hypothesis that migraine is a midlife risk factor for dementia later in life, she said.

“The findings underline the value of investigating the effect of migraine medications in dementia risk to assess the impact of mild to moderate migraines,” Dr. Islamoska said. “Therefore, the next step is to investigate the risk of dementia among users of migraine medications who are not diagnosed with migraines at hospitals.”

Strengths of the study, Dr. Islamoska noted, were its size and national nature of its population, that it included all migraine diagnoses at hospitals over a 29-year period, that it made adjustments for confounding of well-established dementia risk factors, and that it validated dementia diagnoses after age 60 years.

One limitation was that the study only included hospital-based diagnoses of dementia while 60% of cases in Denmark are undiagnosed, “thus our results only apply to migraine that is severe enough to require a hospital contact,” Dr. Islamoska said, while most migraine cases are treated in the primary care setting.

Also, the young study population may have a lower dementia risk. “We also know that age of migraine registration may not corresponded with the actual onset, since migraine is a complex disorder with individual variation in patient’s burden and course of disease,” Dr. Islamoska said.

“Future studies are needed to understand the pathological mechanisms underlying the relationship between migraine and dementia and to investigate whether proper prophylactic treatment of migraine can potentially prevent dementia,” Dr. Islamoska said. “In addition, when investigating the association between these two prevalent neurological disorders, the timing of migraine diagnosis and dementia onset is important to ensure temporality. We took this into account in our study to strengthen the validity of our results.”
 

‘Surprising’ findings

Andrew Charles, MD, director of the Goldberg Migraine Program at the University of California, Los Angeles, said the Danish study makes an important contribution to the literature on dementia risk factors. “Vanishingly small amounts of attention have been paid to migraine as a potential risk factor,” he said. However, he called the results “surprising” based on his own clinical experience. “I actually had a sense that migraine was somehow protective against Alzheimer’s or other kinds of dementias.”

He questioned if the migraine-dementia link could be a “reporting artifact” of migraine sufferers merely going to the neurologist, raising the likelihood of a positive migraine diagnosis. Nonetheless, the results are “intriguing” and raise important questions about migraine therapy and dementia risk.

“If it holds up, it really is something that behooves us to understand whether intervening in terms of therapy for migraine has even more consequences beyond just the immediate relief of symptoms,” Dr. Charles said. “It’s something we should be thinking about in terms of preventing longer-term consequences of this disorder.”

Dr. Islamoska disclosed that Veluxfondent funded the study as part of her PhD project. Dr. Charles disclosed he is a consultant to Amgen, Biohaven Pharmaceuticals, Eli Lilly, Lundbeck, and Novartis.

SOURCE: Islamoska S et al. AHS 2020, Submission 846214.

Preliminary results from a population-based cohort study support previous reports that migraine is a midlife risk factor for dementia later in life, but further determined that migraine with aura and frequent hospital contacts significantly increased dementia risk after age 60 years, according to results from a Danish registry presented at the virtual annual meeting of the American Headache Society.

“The findings of this study emphasize the need for studies in the migraine-dementia pathophysiology, in particular in migraine cases with aura,” said Sabrina Islamoska, MSc, PhD, a postdoctoral researcher in the department of public health at the University of Copenhagen. “This study highlights the importance of monitoring severe migraine to potentially prevent dementia.”
 

A national register-based study

The study used Danish national register–based data from 1988 to 2017 of 1.66 million individuals born between 1935 and 1956, retrieving exposure information until age 59 years and following individuals for dementia after age 60. The matched analysis included 18,135 people registered with migraine before age 59 and 1.38 million without migraine. The matched study population was 62,578.

A diagnosis of dementia or use of dementia medications after age 60 years was the main outcome. Covariates included socioeconomic factors, psychiatric comorbidities and other headache diagnoses.

“To the best of our knowledge, no previous national register–based studies have investigated the risk of dementia among individuals who suffer from migraine with aura,” Dr. Islamoska said.

The preliminary findings revealed that the median age at diagnosis was 49 years and about 70% of the migraine population were women. “There was a 50% higher dementia rate in individuals who had any migraine diagnosis,” Dr. Islamoska said.

“We also found a 20% higher but nonsignificant dementia rate in individuals who had migraine without aura,” she said. However, when the migraine-with-aura population was evaluated, it was found to have a dementia rate two times higher than people with no migraine. “The dementia rate was higher if individuals had more frequent hospital contacts with migraine.”

The findings support the hypothesis that migraine is a midlife risk factor for dementia later in life, she said.

“The findings underline the value of investigating the effect of migraine medications in dementia risk to assess the impact of mild to moderate migraines,” Dr. Islamoska said. “Therefore, the next step is to investigate the risk of dementia among users of migraine medications who are not diagnosed with migraines at hospitals.”

Strengths of the study, Dr. Islamoska noted, were its size and national nature of its population, that it included all migraine diagnoses at hospitals over a 29-year period, that it made adjustments for confounding of well-established dementia risk factors, and that it validated dementia diagnoses after age 60 years.

One limitation was that the study only included hospital-based diagnoses of dementia while 60% of cases in Denmark are undiagnosed, “thus our results only apply to migraine that is severe enough to require a hospital contact,” Dr. Islamoska said, while most migraine cases are treated in the primary care setting.

Also, the young study population may have a lower dementia risk. “We also know that age of migraine registration may not corresponded with the actual onset, since migraine is a complex disorder with individual variation in patient’s burden and course of disease,” Dr. Islamoska said.

“Future studies are needed to understand the pathological mechanisms underlying the relationship between migraine and dementia and to investigate whether proper prophylactic treatment of migraine can potentially prevent dementia,” Dr. Islamoska said. “In addition, when investigating the association between these two prevalent neurological disorders, the timing of migraine diagnosis and dementia onset is important to ensure temporality. We took this into account in our study to strengthen the validity of our results.”
 

‘Surprising’ findings

Andrew Charles, MD, director of the Goldberg Migraine Program at the University of California, Los Angeles, said the Danish study makes an important contribution to the literature on dementia risk factors. “Vanishingly small amounts of attention have been paid to migraine as a potential risk factor,” he said. However, he called the results “surprising” based on his own clinical experience. “I actually had a sense that migraine was somehow protective against Alzheimer’s or other kinds of dementias.”

He questioned if the migraine-dementia link could be a “reporting artifact” of migraine sufferers merely going to the neurologist, raising the likelihood of a positive migraine diagnosis. Nonetheless, the results are “intriguing” and raise important questions about migraine therapy and dementia risk.

“If it holds up, it really is something that behooves us to understand whether intervening in terms of therapy for migraine has even more consequences beyond just the immediate relief of symptoms,” Dr. Charles said. “It’s something we should be thinking about in terms of preventing longer-term consequences of this disorder.”

Dr. Islamoska disclosed that Veluxfondent funded the study as part of her PhD project. Dr. Charles disclosed he is a consultant to Amgen, Biohaven Pharmaceuticals, Eli Lilly, Lundbeck, and Novartis.

SOURCE: Islamoska S et al. AHS 2020, Submission 846214.

The Food and Drug Administration has approved flortaucipir F18 injection (Tauvid, Avid Radiopharmaceuticals), the first diagnostic tau radiotracer for use with PET, to estimate the density and distribution of aggregated tau neurofibrillary tangles (NFTs) in adults with cognitive impairment who are being evaluated for Alzheimer disease.

“While there are FDA-approved imaging drugs for amyloid pathology, this is the first drug approved for imaging tau pathology, one of the two neuropathological hallmarks of Alzheimer’s disease, and represents a major advance for patients with cognitive impairment being evaluated for the condition,” Charles Ganley, MD, director of the Office of Specialty Medicine at the Center for Drug Evaluation and Research, said in an FDA news release.

“The use of diagnostic imaging can help patients and their families plan for the future and make informed choices about their health and well-being, in addition to facilitating appropriate patient management for physicians,” Reisa Sperling, MD, director of the Center for Alzheimer Research and Treatment at Brigham and Women’s Hospital and Massachusetts General Hospital, Boston, said in a company news release.

“Determining the anatomic distribution and density of tau NFTs in the brain was previously possible only at autopsy. Now we have a way to obtain this important information in patients,” said Dr. Sperling.
 

Clinical trial results

Following intravenous administration, flortaucipir F18 binds to tau pathology in the brain and can be seen on a PET scan.

The safety and effectiveness of the tau tracer were demonstrated in two clinical studies. In each study, five evaluators, blinded to clinical information, interpreted the flortaucipir F18 PET scan results as positive or negative.

The first study included 156 terminally ill patients who agreed to undergo flortaucipir F18 PET imaging and to donate their brains after death. Of these patients, 64 died within 9 months of undergoing brain scanning. The evaluators’ readings of these scans were compared with postmortem readings from independent pathologists blinded to scan results.

Evaluators reading the flortaucipir F18 PET scans had a “high probability” of correctly evaluating patients with tau pathology and had an “average to high probability” of correctly evaluating patients without tau pathology, the FDA said in the release.

According to the company, reader sensitivity ranged from 92% (95% confidence interval, 80%-97%) to 100% (95% CI, 91%-100%). Specificity ranged from 52% (95% CI, 34%-70%) to 92% (95% CI, 75%-98%).
 

Initial limited availability

The second study included the same patients with terminal illness as the first study, plus 18 additional patients who had terminal illness and 159 patients who had cognitive impairment and were being evaluated for Alzheimer’s disease (the indicated population).

The study gauged how well evaluators’ readings of flortaucipir F18 PET scans agreed with each other’s assessments of the readings. In this study, reader agreement was 0.87 (perfect agreement was indicated as 1) across all 241 patients.

In a separate subgroup analysis that included the 82 terminally ill patients who were diagnosed after death and the 159 patients with cognitive impairment, reader agreement was 0.90 for the patients in the indicated population and 0.82 in the terminally ill patients.

The FDA noted that the ability of flortaucipir F18 PET scans to detect tau pathology was assessed in patients with generally severe stages of dementia and may be lower in patients with cognitive decline of earlier stages.

The most common adverse reactions among patients who received flortaucipir F18 injection were headache, injection site pain, and an increase in blood pressure. The tau radiotracer is not indicated for use in the evaluation of patients for chronic traumatic encephalopathy.

The FDA granted flortaucipir F18 priority review, in which the FDA aims to take action on an application within 6 months of the time the agency determines that the drug, if approved, would significantly improve the safety or effectiveness of treating, diagnosing, or preventing a serious condition.

The company said that the availability of flortaucipir F18 will initially be “limited and will expand in response to commercial demand and payor reimbursement.”

Alzheimer’s disease is among the top 10 leading causes of death in the United States. In 2014, 5 million Americans were living with the disease, according to federal health officials. That number is projected to nearly triple to 14 million by 2060.

A version of this article originally appeared on Medscape.com.

The Food and Drug Administration has approved flortaucipir F18 injection (Tauvid, Avid Radiopharmaceuticals), the first diagnostic tau radiotracer for use with PET, to estimate the density and distribution of aggregated tau neurofibrillary tangles (NFTs) in adults with cognitive impairment who are being evaluated for Alzheimer disease.

“While there are FDA-approved imaging drugs for amyloid pathology, this is the first drug approved for imaging tau pathology, one of the two neuropathological hallmarks of Alzheimer’s disease, and represents a major advance for patients with cognitive impairment being evaluated for the condition,” Charles Ganley, MD, director of the Office of Specialty Medicine at the Center for Drug Evaluation and Research, said in an FDA news release.

“The use of diagnostic imaging can help patients and their families plan for the future and make informed choices about their health and well-being, in addition to facilitating appropriate patient management for physicians,” Reisa Sperling, MD, director of the Center for Alzheimer Research and Treatment at Brigham and Women’s Hospital and Massachusetts General Hospital, Boston, said in a company news release.

“Determining the anatomic distribution and density of tau NFTs in the brain was previously possible only at autopsy. Now we have a way to obtain this important information in patients,” said Dr. Sperling.
 

Clinical trial results

Following intravenous administration, flortaucipir F18 binds to tau pathology in the brain and can be seen on a PET scan.

The safety and effectiveness of the tau tracer were demonstrated in two clinical studies. In each study, five evaluators, blinded to clinical information, interpreted the flortaucipir F18 PET scan results as positive or negative.

The first study included 156 terminally ill patients who agreed to undergo flortaucipir F18 PET imaging and to donate their brains after death. Of these patients, 64 died within 9 months of undergoing brain scanning. The evaluators’ readings of these scans were compared with postmortem readings from independent pathologists blinded to scan results.

Evaluators reading the flortaucipir F18 PET scans had a “high probability” of correctly evaluating patients with tau pathology and had an “average to high probability” of correctly evaluating patients without tau pathology, the FDA said in the release.

According to the company, reader sensitivity ranged from 92% (95% confidence interval, 80%-97%) to 100% (95% CI, 91%-100%). Specificity ranged from 52% (95% CI, 34%-70%) to 92% (95% CI, 75%-98%).
 

Initial limited availability

The second study included the same patients with terminal illness as the first study, plus 18 additional patients who had terminal illness and 159 patients who had cognitive impairment and were being evaluated for Alzheimer’s disease (the indicated population).

The study gauged how well evaluators’ readings of flortaucipir F18 PET scans agreed with each other’s assessments of the readings. In this study, reader agreement was 0.87 (perfect agreement was indicated as 1) across all 241 patients.

In a separate subgroup analysis that included the 82 terminally ill patients who were diagnosed after death and the 159 patients with cognitive impairment, reader agreement was 0.90 for the patients in the indicated population and 0.82 in the terminally ill patients.

The FDA noted that the ability of flortaucipir F18 PET scans to detect tau pathology was assessed in patients with generally severe stages of dementia and may be lower in patients with cognitive decline of earlier stages.

The most common adverse reactions among patients who received flortaucipir F18 injection were headache, injection site pain, and an increase in blood pressure. The tau radiotracer is not indicated for use in the evaluation of patients for chronic traumatic encephalopathy.

The FDA granted flortaucipir F18 priority review, in which the FDA aims to take action on an application within 6 months of the time the agency determines that the drug, if approved, would significantly improve the safety or effectiveness of treating, diagnosing, or preventing a serious condition.

The company said that the availability of flortaucipir F18 will initially be “limited and will expand in response to commercial demand and payor reimbursement.”

Alzheimer’s disease is among the top 10 leading causes of death in the United States. In 2014, 5 million Americans were living with the disease, according to federal health officials. That number is projected to nearly triple to 14 million by 2060.

A version of this article originally appeared on Medscape.com.

The Food and Drug Administration has approved flortaucipir F18 injection (Tauvid, Avid Radiopharmaceuticals), the first diagnostic tau radiotracer for use with PET, to estimate the density and distribution of aggregated tau neurofibrillary tangles (NFTs) in adults with cognitive impairment who are being evaluated for Alzheimer disease.

“While there are FDA-approved imaging drugs for amyloid pathology, this is the first drug approved for imaging tau pathology, one of the two neuropathological hallmarks of Alzheimer’s disease, and represents a major advance for patients with cognitive impairment being evaluated for the condition,” Charles Ganley, MD, director of the Office of Specialty Medicine at the Center for Drug Evaluation and Research, said in an FDA news release.

“The use of diagnostic imaging can help patients and their families plan for the future and make informed choices about their health and well-being, in addition to facilitating appropriate patient management for physicians,” Reisa Sperling, MD, director of the Center for Alzheimer Research and Treatment at Brigham and Women’s Hospital and Massachusetts General Hospital, Boston, said in a company news release.

“Determining the anatomic distribution and density of tau NFTs in the brain was previously possible only at autopsy. Now we have a way to obtain this important information in patients,” said Dr. Sperling.
 

Clinical trial results

Following intravenous administration, flortaucipir F18 binds to tau pathology in the brain and can be seen on a PET scan.

The safety and effectiveness of the tau tracer were demonstrated in two clinical studies. In each study, five evaluators, blinded to clinical information, interpreted the flortaucipir F18 PET scan results as positive or negative.

The first study included 156 terminally ill patients who agreed to undergo flortaucipir F18 PET imaging and to donate their brains after death. Of these patients, 64 died within 9 months of undergoing brain scanning. The evaluators’ readings of these scans were compared with postmortem readings from independent pathologists blinded to scan results.

Evaluators reading the flortaucipir F18 PET scans had a “high probability” of correctly evaluating patients with tau pathology and had an “average to high probability” of correctly evaluating patients without tau pathology, the FDA said in the release.

According to the company, reader sensitivity ranged from 92% (95% confidence interval, 80%-97%) to 100% (95% CI, 91%-100%). Specificity ranged from 52% (95% CI, 34%-70%) to 92% (95% CI, 75%-98%).
 

Initial limited availability

The second study included the same patients with terminal illness as the first study, plus 18 additional patients who had terminal illness and 159 patients who had cognitive impairment and were being evaluated for Alzheimer’s disease (the indicated population).

The study gauged how well evaluators’ readings of flortaucipir F18 PET scans agreed with each other’s assessments of the readings. In this study, reader agreement was 0.87 (perfect agreement was indicated as 1) across all 241 patients.

In a separate subgroup analysis that included the 82 terminally ill patients who were diagnosed after death and the 159 patients with cognitive impairment, reader agreement was 0.90 for the patients in the indicated population and 0.82 in the terminally ill patients.

The FDA noted that the ability of flortaucipir F18 PET scans to detect tau pathology was assessed in patients with generally severe stages of dementia and may be lower in patients with cognitive decline of earlier stages.

The most common adverse reactions among patients who received flortaucipir F18 injection were headache, injection site pain, and an increase in blood pressure. The tau radiotracer is not indicated for use in the evaluation of patients for chronic traumatic encephalopathy.

The FDA granted flortaucipir F18 priority review, in which the FDA aims to take action on an application within 6 months of the time the agency determines that the drug, if approved, would significantly improve the safety or effectiveness of treating, diagnosing, or preventing a serious condition.

The company said that the availability of flortaucipir F18 will initially be “limited and will expand in response to commercial demand and payor reimbursement.”

Alzheimer’s disease is among the top 10 leading causes of death in the United States. In 2014, 5 million Americans were living with the disease, according to federal health officials. That number is projected to nearly triple to 14 million by 2060.

A version of this article originally appeared on Medscape.com.

High-dose aducanumab, a human monoclonal antibody in development, significantly reduced clinical decline in people with early Alzheimer’s disease in one randomized, placebo-controlled phase 3 study but not in another identical study. Aducanumab was associated with favorable changes in activities of daily living and in Alzheimer’s disease biomarkers.

The EMERGE and ENGAGE studies compared low-dose and high-dose aducanumab and placebo over 78 weeks. The high-dose EMERGE cohort experienced a 22% improvement in the primary outcome – adjusted mean Clinical Dementia Rating Sum of Box (CDR-SB) scores – compared with baseline.

“We have with EMERGE, in the high-dose group, a positive result,” said lead author Samantha Budd Haeberlein, PhD, who presented this research online as part of the 2020 American Academy of Neurology Science Highlights.

In contrast, the low-dose EMERGE group, as well as the low-dose and high-dose cohorts in the ENGAGE study, experienced no statistically significant change in CDR-SB outcomes.

Clinical benefit was associated with the degree of exposure to aducanumab. For example, a protocol adjustment during the study increased the mean dose of aducanumab, a move associated with better outcomes.

“We believe that the difference between the results was largely due to patients’ greater exposure to the high dose of aducanumab,” Dr. Haerberlein, senior vice president and head of the neurodegeneration development unit at Biogen in Cambridge, Mass., said in an interview.

Although the studies shared an identical design, “because ENGAGE began enrolling first and recruitment remained ahead of EMERGE, more patients in EMERGE were impacted by the protocol amendments, which we believe resulted in a higher number of patients exposed to the highest dose in EMERGE versus ENGAGE,” Dr. Haerberlein added.

The EMERGE and ENGAGE studies were conducted at 348 sites in 20 countries. The research included a total of 3,285 participants with mild cognitive impairment caused by Alzheimer’s disease or mild Alzheimer’s disease dementia.

The mean age was 70 years, about 52% were women, and slightly more than half had a history of taking medication for Alzheimer’s disease. The mean Mini-Mental State Exam (MMSE) score was 26 at baseline.
 

Key findings

Dr. Haerberlein and colleagues reported that the 22% decrease in CDR-SB scores in the high-dose EMERGE participants was significant (P = .01). No significant difference emerged, however, in the ENGAGE study, where high-dose participants had a 2% decrease at 78 weeks in CDR-SB scores (P = .83).

The high-dose EMERGE regimen was also associated with an 18% improvement in MMSE scores (P < .05). In the ENGAGE study, the high-dose MMSE scores increased a nonsignificant 3% (P = .81).

The researchers reported no significant differences in the low-dose cohorts in both studies regarding CDR-SB or MMSE scores at week 78, compared with baseline.

They also assessed amyloid using PET scans. Levels remained essentially the same throughout both studies in the placebo participants. In contrast, there was a statistically significant, dose- and time-dependent reduction associated with both low- and high-dose aducanumab.

Aducanumab treatment was associated with significant benefits on measures of cognition and function such as memory, orientation, and language, Dr. Haeberlein said. “Patients also experienced benefits on activities of daily living including conducting personal finances; performing household chores such as cleaning, shopping, and doing laundry; and independently traveling out of the home.”

Furthermore, reductions in the CSF biomarker phospho-tau in the high-dose EMERGE and ENGAGE cohorts were statistically significant. In contrast, changes in total tau were not significant.

The proportion of patients who experienced an adverse event during EMERGE was similar across groups – 92% of the high-dose group, 88% of the low-dose group, and 87% of the placebo cohort. Similar rates were reported in the ENGAGE high-dose, 90%; low-dose, 90%; and placebo cohorts, 86%.

Adverse events reported in more than 10% of participants included headache, nasopharyngitis, and two forms of amyloid-related imaging abnormalities (ARIA), one of which related to edema (ARIA-E) and the other to hemosiderosis (ARIA-H).
 

Future plans

Going forward, the researchers are conducting a redosing study to offer aducanumab to all participants in the clinical trials. Also, Biogen is completing the filing of a Biologics License Application with the Food and Drug Administration and with regulatory agencies in other countries.

Early identification and treatment of Alzheimer’s disease remains a priority, Dr. Haeberlein said, because it offers an opportunity to begin health measures like exercise, mental activity, and social engagement; allows people more time to plan for the future; and gives families and loved ones’ time to prepare and support each other. From a research perspective, early identification of this population can maximize chances of participation in a clinical trial as well.
 

Unanswered questions

“Briefly, while both [studies] were looking at aducanumab’s effect on rate of decline across a variety of measures, one statistically showed a positive impact in a subset and the other did not,” Richard J. Caselli, MD, said when asked to comment on the EMERGE and ENGAGE findings. “The subset were the mildest affected patients on the highest dose for the longest time.”

The main difference between the two studies was that one was adequately powered for this subanalysis and the other was not. Even the underpowered subanalysis showed a beneficial trend, added Dr. Caselli, a neurologist at the Mayo Clinic in Phoenix, Arizona.

Dr. Caselli said these findings raise a number of unanswered questions. For example, is a subanalysis valid? Is the degree of improvement clinically meaningful or meaningful enough to justify the anticipated cost of the drug itself – “likely to be very expensive” plus the “cost and hassle” of monthly IV infusions? Is there enough provider and infusion center capacity going forward? What will the reimbursement from third party payers be like?

Biogen sponsored the EMERGE and ENGAGE studies. Dr. Haeberlein is a Biogen employee. Dr. Caselli had no relevant disclosures.

SOURCE: Haeberlein SB et al. AAN 2020, Abstract 46977.

High-dose aducanumab, a human monoclonal antibody in development, significantly reduced clinical decline in people with early Alzheimer’s disease in one randomized, placebo-controlled phase 3 study but not in another identical study. Aducanumab was associated with favorable changes in activities of daily living and in Alzheimer’s disease biomarkers.

The EMERGE and ENGAGE studies compared low-dose and high-dose aducanumab and placebo over 78 weeks. The high-dose EMERGE cohort experienced a 22% improvement in the primary outcome – adjusted mean Clinical Dementia Rating Sum of Box (CDR-SB) scores – compared with baseline.

“We have with EMERGE, in the high-dose group, a positive result,” said lead author Samantha Budd Haeberlein, PhD, who presented this research online as part of the 2020 American Academy of Neurology Science Highlights.

In contrast, the low-dose EMERGE group, as well as the low-dose and high-dose cohorts in the ENGAGE study, experienced no statistically significant change in CDR-SB outcomes.

Clinical benefit was associated with the degree of exposure to aducanumab. For example, a protocol adjustment during the study increased the mean dose of aducanumab, a move associated with better outcomes.

“We believe that the difference between the results was largely due to patients’ greater exposure to the high dose of aducanumab,” Dr. Haerberlein, senior vice president and head of the neurodegeneration development unit at Biogen in Cambridge, Mass., said in an interview.

Although the studies shared an identical design, “because ENGAGE began enrolling first and recruitment remained ahead of EMERGE, more patients in EMERGE were impacted by the protocol amendments, which we believe resulted in a higher number of patients exposed to the highest dose in EMERGE versus ENGAGE,” Dr. Haerberlein added.

The EMERGE and ENGAGE studies were conducted at 348 sites in 20 countries. The research included a total of 3,285 participants with mild cognitive impairment caused by Alzheimer’s disease or mild Alzheimer’s disease dementia.

The mean age was 70 years, about 52% were women, and slightly more than half had a history of taking medication for Alzheimer’s disease. The mean Mini-Mental State Exam (MMSE) score was 26 at baseline.
 

Key findings

Dr. Haerberlein and colleagues reported that the 22% decrease in CDR-SB scores in the high-dose EMERGE participants was significant (P = .01). No significant difference emerged, however, in the ENGAGE study, where high-dose participants had a 2% decrease at 78 weeks in CDR-SB scores (P = .83).

The high-dose EMERGE regimen was also associated with an 18% improvement in MMSE scores (P < .05). In the ENGAGE study, the high-dose MMSE scores increased a nonsignificant 3% (P = .81).

The researchers reported no significant differences in the low-dose cohorts in both studies regarding CDR-SB or MMSE scores at week 78, compared with baseline.

They also assessed amyloid using PET scans. Levels remained essentially the same throughout both studies in the placebo participants. In contrast, there was a statistically significant, dose- and time-dependent reduction associated with both low- and high-dose aducanumab.

Aducanumab treatment was associated with significant benefits on measures of cognition and function such as memory, orientation, and language, Dr. Haeberlein said. “Patients also experienced benefits on activities of daily living including conducting personal finances; performing household chores such as cleaning, shopping, and doing laundry; and independently traveling out of the home.”

Furthermore, reductions in the CSF biomarker phospho-tau in the high-dose EMERGE and ENGAGE cohorts were statistically significant. In contrast, changes in total tau were not significant.

The proportion of patients who experienced an adverse event during EMERGE was similar across groups – 92% of the high-dose group, 88% of the low-dose group, and 87% of the placebo cohort. Similar rates were reported in the ENGAGE high-dose, 90%; low-dose, 90%; and placebo cohorts, 86%.

Adverse events reported in more than 10% of participants included headache, nasopharyngitis, and two forms of amyloid-related imaging abnormalities (ARIA), one of which related to edema (ARIA-E) and the other to hemosiderosis (ARIA-H).
 

Future plans

Going forward, the researchers are conducting a redosing study to offer aducanumab to all participants in the clinical trials. Also, Biogen is completing the filing of a Biologics License Application with the Food and Drug Administration and with regulatory agencies in other countries.

Early identification and treatment of Alzheimer’s disease remains a priority, Dr. Haeberlein said, because it offers an opportunity to begin health measures like exercise, mental activity, and social engagement; allows people more time to plan for the future; and gives families and loved ones’ time to prepare and support each other. From a research perspective, early identification of this population can maximize chances of participation in a clinical trial as well.
 

Unanswered questions

“Briefly, while both [studies] were looking at aducanumab’s effect on rate of decline across a variety of measures, one statistically showed a positive impact in a subset and the other did not,” Richard J. Caselli, MD, said when asked to comment on the EMERGE and ENGAGE findings. “The subset were the mildest affected patients on the highest dose for the longest time.”

The main difference between the two studies was that one was adequately powered for this subanalysis and the other was not. Even the underpowered subanalysis showed a beneficial trend, added Dr. Caselli, a neurologist at the Mayo Clinic in Phoenix, Arizona.

Dr. Caselli said these findings raise a number of unanswered questions. For example, is a subanalysis valid? Is the degree of improvement clinically meaningful or meaningful enough to justify the anticipated cost of the drug itself – “likely to be very expensive” plus the “cost and hassle” of monthly IV infusions? Is there enough provider and infusion center capacity going forward? What will the reimbursement from third party payers be like?

Biogen sponsored the EMERGE and ENGAGE studies. Dr. Haeberlein is a Biogen employee. Dr. Caselli had no relevant disclosures.

SOURCE: Haeberlein SB et al. AAN 2020, Abstract 46977.

High-dose aducanumab, a human monoclonal antibody in development, significantly reduced clinical decline in people with early Alzheimer’s disease in one randomized, placebo-controlled phase 3 study but not in another identical study. Aducanumab was associated with favorable changes in activities of daily living and in Alzheimer’s disease biomarkers.

The EMERGE and ENGAGE studies compared low-dose and high-dose aducanumab and placebo over 78 weeks. The high-dose EMERGE cohort experienced a 22% improvement in the primary outcome – adjusted mean Clinical Dementia Rating Sum of Box (CDR-SB) scores – compared with baseline.

“We have with EMERGE, in the high-dose group, a positive result,” said lead author Samantha Budd Haeberlein, PhD, who presented this research online as part of the 2020 American Academy of Neurology Science Highlights.

In contrast, the low-dose EMERGE group, as well as the low-dose and high-dose cohorts in the ENGAGE study, experienced no statistically significant change in CDR-SB outcomes.

Clinical benefit was associated with the degree of exposure to aducanumab. For example, a protocol adjustment during the study increased the mean dose of aducanumab, a move associated with better outcomes.

“We believe that the difference between the results was largely due to patients’ greater exposure to the high dose of aducanumab,” Dr. Haerberlein, senior vice president and head of the neurodegeneration development unit at Biogen in Cambridge, Mass., said in an interview.

Although the studies shared an identical design, “because ENGAGE began enrolling first and recruitment remained ahead of EMERGE, more patients in EMERGE were impacted by the protocol amendments, which we believe resulted in a higher number of patients exposed to the highest dose in EMERGE versus ENGAGE,” Dr. Haerberlein added.

The EMERGE and ENGAGE studies were conducted at 348 sites in 20 countries. The research included a total of 3,285 participants with mild cognitive impairment caused by Alzheimer’s disease or mild Alzheimer’s disease dementia.

The mean age was 70 years, about 52% were women, and slightly more than half had a history of taking medication for Alzheimer’s disease. The mean Mini-Mental State Exam (MMSE) score was 26 at baseline.
 

Key findings

Dr. Haerberlein and colleagues reported that the 22% decrease in CDR-SB scores in the high-dose EMERGE participants was significant (P = .01). No significant difference emerged, however, in the ENGAGE study, where high-dose participants had a 2% decrease at 78 weeks in CDR-SB scores (P = .83).

The high-dose EMERGE regimen was also associated with an 18% improvement in MMSE scores (P < .05). In the ENGAGE study, the high-dose MMSE scores increased a nonsignificant 3% (P = .81).

The researchers reported no significant differences in the low-dose cohorts in both studies regarding CDR-SB or MMSE scores at week 78, compared with baseline.

They also assessed amyloid using PET scans. Levels remained essentially the same throughout both studies in the placebo participants. In contrast, there was a statistically significant, dose- and time-dependent reduction associated with both low- and high-dose aducanumab.

Aducanumab treatment was associated with significant benefits on measures of cognition and function such as memory, orientation, and language, Dr. Haeberlein said. “Patients also experienced benefits on activities of daily living including conducting personal finances; performing household chores such as cleaning, shopping, and doing laundry; and independently traveling out of the home.”

Furthermore, reductions in the CSF biomarker phospho-tau in the high-dose EMERGE and ENGAGE cohorts were statistically significant. In contrast, changes in total tau were not significant.

The proportion of patients who experienced an adverse event during EMERGE was similar across groups – 92% of the high-dose group, 88% of the low-dose group, and 87% of the placebo cohort. Similar rates were reported in the ENGAGE high-dose, 90%; low-dose, 90%; and placebo cohorts, 86%.

Adverse events reported in more than 10% of participants included headache, nasopharyngitis, and two forms of amyloid-related imaging abnormalities (ARIA), one of which related to edema (ARIA-E) and the other to hemosiderosis (ARIA-H).
 

Future plans

Going forward, the researchers are conducting a redosing study to offer aducanumab to all participants in the clinical trials. Also, Biogen is completing the filing of a Biologics License Application with the Food and Drug Administration and with regulatory agencies in other countries.

Early identification and treatment of Alzheimer’s disease remains a priority, Dr. Haeberlein said, because it offers an opportunity to begin health measures like exercise, mental activity, and social engagement; allows people more time to plan for the future; and gives families and loved ones’ time to prepare and support each other. From a research perspective, early identification of this population can maximize chances of participation in a clinical trial as well.
 

Unanswered questions

“Briefly, while both [studies] were looking at aducanumab’s effect on rate of decline across a variety of measures, one statistically showed a positive impact in a subset and the other did not,” Richard J. Caselli, MD, said when asked to comment on the EMERGE and ENGAGE findings. “The subset were the mildest affected patients on the highest dose for the longest time.”

The main difference between the two studies was that one was adequately powered for this subanalysis and the other was not. Even the underpowered subanalysis showed a beneficial trend, added Dr. Caselli, a neurologist at the Mayo Clinic in Phoenix, Arizona.

Dr. Caselli said these findings raise a number of unanswered questions. For example, is a subanalysis valid? Is the degree of improvement clinically meaningful or meaningful enough to justify the anticipated cost of the drug itself – “likely to be very expensive” plus the “cost and hassle” of monthly IV infusions? Is there enough provider and infusion center capacity going forward? What will the reimbursement from third party payers be like?

Biogen sponsored the EMERGE and ENGAGE studies. Dr. Haeberlein is a Biogen employee. Dr. Caselli had no relevant disclosures.

SOURCE: Haeberlein SB et al. AAN 2020, Abstract 46977.

One of the greatest tragedies of the first wave of the COVID-19 pandemic has been the failure of health policy makers to anticipate and mitigate the enormous havoc the policy of social distancing would wreak on mental health and cognitive function in older persons, speakers agreed at a webinar on COVID-19, social distancing, and its impact on social and mental health in the elderly hosted by the International Psychogeriatric Association in collaboration with INTERDEM.

iofoto/Thinkstock

“Social distancing” is a two-edged sword: It is for now and the foreseeable future the only available effective strategy for protecting against infection in the older population most vulnerable to severe forms of COVID-19. Yet social distancing also has caused many elderly – particularly those in nursing homes and other long-term care facilities – to plunge into a profound experience of loneliness, isolation, distress, feelings of abandonment, anxiety, depression, and accelerated cognitive deterioration. And this needn’t have happened, the mental health professionals asserted.

“When are we going to get rid of the term ‘social distancing?’ ” asked IPA President William E. Reichman, MD. “Many have appreciated – including the World Health Organization – that the real issue is physical distancing to prevent contagion. And physical distancing doesn’t have to mean social distancing.”

Social connectedness between elderly persons and their peers and family members can be maintained and should be emphatically encouraged during the physical distancing required by the pandemic, said Myrra Vernooij-Dassen, PhD, of Radboud University in Nigmegen, the Netherlands, and chair of INTERDEM, a pan-European network of dementia researchers.

This can be achieved using readily available technologies, including the telephone and videoconferencing, as well as by creating opportunities for supervised masked visits between a family member and an elderly loved one in outdoor courtyards or gardens within long-term care facilities. And yet, as the pandemic seized hold in many parts of the world, family members were blocked from entry to these facilities, she observed.
 

Impact on mental health, cognition

Dr. Vernooij-Dassen noted that studies of previous quarantine periods as well as preliminary findings during the COVID-19 pandemic demonstrate an inverse relationship between social isolation measures and cognitive functioning in the elderly.

“A striking finding is that lack of social interaction is associated with incident dementia. Conversely, epidemiologic data indicate that a socially integrated lifestyle had a favorable influence on cognitive functioning and could even delay onset of dementia,” she said.

INTERDEM is backing two ongoing studies evaluating the hypothesis that interventions fostering increased social interaction among elderly individuals can delay onset of dementia or favorably affect its course. The proposed mechanism of benefit is stimulation of brain plasticity to enhance cognitive reserve.

“This is a hypothesis of hope. We know that social interaction for humans is like water to plants – we really, really need it,” she explained.

Diego de Leo, MD, PhD, emeritus professor of psychiatry and former director of the Australian Institute for Suicide Research and Prevention at Griffith University in Brisbane, was living in hard-hit Padua, Italy, during the first surge of COVID-19. He described his anecdotal experience.

“What I hear from many Italian colleagues and friends and directors of mental health services is that emergency admissions related to mental disorders declined during the first wave of the COVID pandemic. For example, not many people attended emergency departments due to suicide attempts; there was a very marked decrease in the number of suicide attempts during the worst days of the pandemic,” he said.

People with psychiatric conditions were afraid to go to the hospital because they thought they would contract the infection and die there. That’s changing now, however.

“Now there is an increased number of admissions to mental health units. A new wave. It has been a U-shaped curve. And we’re now witnessing an increasing number of fatal suicides due to persistent fears, due to people imagining that there is no more room for them, and no more future for them from a financial point of view – which is the major negative outcome of this crisis. It will be a disaster for many families,” the psychiatrist continued.

A noteworthy phenomenon in northern Italy was that, when tablets were made available to nursing home residents in an effort to enhance their connectedness to the outside world, those with dementia often became so frustrated and confused by their difficulty in using the devices that they developed a hypokinetic delirium marked by refusal to eat or leave their bed, he reported.

It’s far too early to have reliable data on suicide trends in response to the pandemic, according to Dr. de Leo. But one thing is for sure: The strategy of social distancing employed to curb COVID-19 has increased the prevalence of known risk factors for suicide in older individuals, including loneliness, anxiety, and depression; increased alcohol use; and a perception of being a burden on society. Dr. de Leo directs a foundation dedicated to helping people experiencing traumatic bereavement, and in one recent week, the foundation was contacted by eight families in the province of Padua with a recent death by suicide apparently related to fallout from the COVID-19 pandemic. That’s an unusually high spike in suicide in a province with a population of 1 million.

“People probably preferred to end the agitation, the fear, the extreme anxiety about their destiny by deciding to prematurely truncate their life. That has been reported by nursing staff,” he said.

The Italian government has determined that, to date, 36% of all COVID-related deaths have occurred in people aged 85 years or older, and 84% of deaths were in individuals aged at least 70 years. And in Milan and the surrounding province of Lombardy, it’s estimated that COVID-19 has taken the lives of 25% of all nursing home residents. The North American experience has been uncomfortably similar.

“Almost 80% of COVID deaths in Canada have occurred in congregate settings,” observed Dr. Reichman, professor of psychiatry at the University of Toronto, and president and CEO of Baycrest Health Sciences, a geriatric research center.

“Certainly, the appalling number of deaths in nursing homes is the No. 1 horror of the pandemic,” declared Carmelle Peisah, MBBS, MD, a psychiatrist at the University of New South Wales in Kensington, Australia.
 

The fire next time

The conventional wisdom holds that COVID-19 has caused all sorts of mayhem in the delivery of elder care. Not so, in Dr. Reichman’s view.

“I would suggest that the pandemic has not caused many of the problems we talk about, it’s actually revealed problems that have always been there under the surface. For example, many older people, even before COVID-19, were socially isolated, socially distant. They had difficulty connecting with their relatives, difficulty accessing transportation to get to the store to buy food and see their doctors, and to interact with other older people,” the psychiatrist said.

“I would say as well that the pandemic didn’t cause the problems we’ve seen in long-term congregate senior care. The pandemic revealed them. We’ve had facilities where older people were severely crowded together, which compromises their quality of life, even when there’s not a pandemic. We’ve had difficulty staffing these kinds of environments with people that are paid an honest wage for the very hard work that they do. In many of these settings they’re inadequately trained, not only in infection prevention and control but in all other aspects of care. And the pandemic has revealed that many of these organizations are not properly funded. The government doesn’t support them well enough across jurisdictions, and they can’t raise enough philanthropic funds to provide the kind of quality of life that residents demand,” Dr. Reichman continued.

Could the pandemic spur improved elder care? His hope is that health care professionals, politicians, and society at large will learn from the devastation left by the first surge of the pandemic and will lobby for the resources necessary for much-needed improvements in geriatric care.

“We need to be better prepared should there be not only a second wave of this pandemic, but for other pandemics to come,” Dr. Reichman concluded.

The speakers indicated they had no financial conflicts regarding their presentations.

bjancin@mdedge.com

One of the greatest tragedies of the first wave of the COVID-19 pandemic has been the failure of health policy makers to anticipate and mitigate the enormous havoc the policy of social distancing would wreak on mental health and cognitive function in older persons, speakers agreed at a webinar on COVID-19, social distancing, and its impact on social and mental health in the elderly hosted by the International Psychogeriatric Association in collaboration with INTERDEM.

iofoto/Thinkstock

“Social distancing” is a two-edged sword: It is for now and the foreseeable future the only available effective strategy for protecting against infection in the older population most vulnerable to severe forms of COVID-19. Yet social distancing also has caused many elderly – particularly those in nursing homes and other long-term care facilities – to plunge into a profound experience of loneliness, isolation, distress, feelings of abandonment, anxiety, depression, and accelerated cognitive deterioration. And this needn’t have happened, the mental health professionals asserted.

“When are we going to get rid of the term ‘social distancing?’ ” asked IPA President William E. Reichman, MD. “Many have appreciated – including the World Health Organization – that the real issue is physical distancing to prevent contagion. And physical distancing doesn’t have to mean social distancing.”

Social connectedness between elderly persons and their peers and family members can be maintained and should be emphatically encouraged during the physical distancing required by the pandemic, said Myrra Vernooij-Dassen, PhD, of Radboud University in Nigmegen, the Netherlands, and chair of INTERDEM, a pan-European network of dementia researchers.

This can be achieved using readily available technologies, including the telephone and videoconferencing, as well as by creating opportunities for supervised masked visits between a family member and an elderly loved one in outdoor courtyards or gardens within long-term care facilities. And yet, as the pandemic seized hold in many parts of the world, family members were blocked from entry to these facilities, she observed.
 

Impact on mental health, cognition

Dr. Vernooij-Dassen noted that studies of previous quarantine periods as well as preliminary findings during the COVID-19 pandemic demonstrate an inverse relationship between social isolation measures and cognitive functioning in the elderly.

“A striking finding is that lack of social interaction is associated with incident dementia. Conversely, epidemiologic data indicate that a socially integrated lifestyle had a favorable influence on cognitive functioning and could even delay onset of dementia,” she said.

INTERDEM is backing two ongoing studies evaluating the hypothesis that interventions fostering increased social interaction among elderly individuals can delay onset of dementia or favorably affect its course. The proposed mechanism of benefit is stimulation of brain plasticity to enhance cognitive reserve.

“This is a hypothesis of hope. We know that social interaction for humans is like water to plants – we really, really need it,” she explained.

Diego de Leo, MD, PhD, emeritus professor of psychiatry and former director of the Australian Institute for Suicide Research and Prevention at Griffith University in Brisbane, was living in hard-hit Padua, Italy, during the first surge of COVID-19. He described his anecdotal experience.

“What I hear from many Italian colleagues and friends and directors of mental health services is that emergency admissions related to mental disorders declined during the first wave of the COVID pandemic. For example, not many people attended emergency departments due to suicide attempts; there was a very marked decrease in the number of suicide attempts during the worst days of the pandemic,” he said.

People with psychiatric conditions were afraid to go to the hospital because they thought they would contract the infection and die there. That’s changing now, however.

“Now there is an increased number of admissions to mental health units. A new wave. It has been a U-shaped curve. And we’re now witnessing an increasing number of fatal suicides due to persistent fears, due to people imagining that there is no more room for them, and no more future for them from a financial point of view – which is the major negative outcome of this crisis. It will be a disaster for many families,” the psychiatrist continued.

A noteworthy phenomenon in northern Italy was that, when tablets were made available to nursing home residents in an effort to enhance their connectedness to the outside world, those with dementia often became so frustrated and confused by their difficulty in using the devices that they developed a hypokinetic delirium marked by refusal to eat or leave their bed, he reported.

It’s far too early to have reliable data on suicide trends in response to the pandemic, according to Dr. de Leo. But one thing is for sure: The strategy of social distancing employed to curb COVID-19 has increased the prevalence of known risk factors for suicide in older individuals, including loneliness, anxiety, and depression; increased alcohol use; and a perception of being a burden on society. Dr. de Leo directs a foundation dedicated to helping people experiencing traumatic bereavement, and in one recent week, the foundation was contacted by eight families in the province of Padua with a recent death by suicide apparently related to fallout from the COVID-19 pandemic. That’s an unusually high spike in suicide in a province with a population of 1 million.

“People probably preferred to end the agitation, the fear, the extreme anxiety about their destiny by deciding to prematurely truncate their life. That has been reported by nursing staff,” he said.

The Italian government has determined that, to date, 36% of all COVID-related deaths have occurred in people aged 85 years or older, and 84% of deaths were in individuals aged at least 70 years. And in Milan and the surrounding province of Lombardy, it’s estimated that COVID-19 has taken the lives of 25% of all nursing home residents. The North American experience has been uncomfortably similar.

“Almost 80% of COVID deaths in Canada have occurred in congregate settings,” observed Dr. Reichman, professor of psychiatry at the University of Toronto, and president and CEO of Baycrest Health Sciences, a geriatric research center.

“Certainly, the appalling number of deaths in nursing homes is the No. 1 horror of the pandemic,” declared Carmelle Peisah, MBBS, MD, a psychiatrist at the University of New South Wales in Kensington, Australia.
 

The fire next time

The conventional wisdom holds that COVID-19 has caused all sorts of mayhem in the delivery of elder care. Not so, in Dr. Reichman’s view.

“I would suggest that the pandemic has not caused many of the problems we talk about, it’s actually revealed problems that have always been there under the surface. For example, many older people, even before COVID-19, were socially isolated, socially distant. They had difficulty connecting with their relatives, difficulty accessing transportation to get to the store to buy food and see their doctors, and to interact with other older people,” the psychiatrist said.

“I would say as well that the pandemic didn’t cause the problems we’ve seen in long-term congregate senior care. The pandemic revealed them. We’ve had facilities where older people were severely crowded together, which compromises their quality of life, even when there’s not a pandemic. We’ve had difficulty staffing these kinds of environments with people that are paid an honest wage for the very hard work that they do. In many of these settings they’re inadequately trained, not only in infection prevention and control but in all other aspects of care. And the pandemic has revealed that many of these organizations are not properly funded. The government doesn’t support them well enough across jurisdictions, and they can’t raise enough philanthropic funds to provide the kind of quality of life that residents demand,” Dr. Reichman continued.

Could the pandemic spur improved elder care? His hope is that health care professionals, politicians, and society at large will learn from the devastation left by the first surge of the pandemic and will lobby for the resources necessary for much-needed improvements in geriatric care.

“We need to be better prepared should there be not only a second wave of this pandemic, but for other pandemics to come,” Dr. Reichman concluded.

The speakers indicated they had no financial conflicts regarding their presentations.

bjancin@mdedge.com

One of the greatest tragedies of the first wave of the COVID-19 pandemic has been the failure of health policy makers to anticipate and mitigate the enormous havoc the policy of social distancing would wreak on mental health and cognitive function in older persons, speakers agreed at a webinar on COVID-19, social distancing, and its impact on social and mental health in the elderly hosted by the International Psychogeriatric Association in collaboration with INTERDEM.

iofoto/Thinkstock

“Social distancing” is a two-edged sword: It is for now and the foreseeable future the only available effective strategy for protecting against infection in the older population most vulnerable to severe forms of COVID-19. Yet social distancing also has caused many elderly – particularly those in nursing homes and other long-term care facilities – to plunge into a profound experience of loneliness, isolation, distress, feelings of abandonment, anxiety, depression, and accelerated cognitive deterioration. And this needn’t have happened, the mental health professionals asserted.

“When are we going to get rid of the term ‘social distancing?’ ” asked IPA President William E. Reichman, MD. “Many have appreciated – including the World Health Organization – that the real issue is physical distancing to prevent contagion. And physical distancing doesn’t have to mean social distancing.”

Social connectedness between elderly persons and their peers and family members can be maintained and should be emphatically encouraged during the physical distancing required by the pandemic, said Myrra Vernooij-Dassen, PhD, of Radboud University in Nigmegen, the Netherlands, and chair of INTERDEM, a pan-European network of dementia researchers.

This can be achieved using readily available technologies, including the telephone and videoconferencing, as well as by creating opportunities for supervised masked visits between a family member and an elderly loved one in outdoor courtyards or gardens within long-term care facilities. And yet, as the pandemic seized hold in many parts of the world, family members were blocked from entry to these facilities, she observed.
 

Impact on mental health, cognition

Dr. Vernooij-Dassen noted that studies of previous quarantine periods as well as preliminary findings during the COVID-19 pandemic demonstrate an inverse relationship between social isolation measures and cognitive functioning in the elderly.

“A striking finding is that lack of social interaction is associated with incident dementia. Conversely, epidemiologic data indicate that a socially integrated lifestyle had a favorable influence on cognitive functioning and could even delay onset of dementia,” she said.

INTERDEM is backing two ongoing studies evaluating the hypothesis that interventions fostering increased social interaction among elderly individuals can delay onset of dementia or favorably affect its course. The proposed mechanism of benefit is stimulation of brain plasticity to enhance cognitive reserve.

“This is a hypothesis of hope. We know that social interaction for humans is like water to plants – we really, really need it,” she explained.

Diego de Leo, MD, PhD, emeritus professor of psychiatry and former director of the Australian Institute for Suicide Research and Prevention at Griffith University in Brisbane, was living in hard-hit Padua, Italy, during the first surge of COVID-19. He described his anecdotal experience.

“What I hear from many Italian colleagues and friends and directors of mental health services is that emergency admissions related to mental disorders declined during the first wave of the COVID pandemic. For example, not many people attended emergency departments due to suicide attempts; there was a very marked decrease in the number of suicide attempts during the worst days of the pandemic,” he said.

People with psychiatric conditions were afraid to go to the hospital because they thought they would contract the infection and die there. That’s changing now, however.

“Now there is an increased number of admissions to mental health units. A new wave. It has been a U-shaped curve. And we’re now witnessing an increasing number of fatal suicides due to persistent fears, due to people imagining that there is no more room for them, and no more future for them from a financial point of view – which is the major negative outcome of this crisis. It will be a disaster for many families,” the psychiatrist continued.

A noteworthy phenomenon in northern Italy was that, when tablets were made available to nursing home residents in an effort to enhance their connectedness to the outside world, those with dementia often became so frustrated and confused by their difficulty in using the devices that they developed a hypokinetic delirium marked by refusal to eat or leave their bed, he reported.

It’s far too early to have reliable data on suicide trends in response to the pandemic, according to Dr. de Leo. But one thing is for sure: The strategy of social distancing employed to curb COVID-19 has increased the prevalence of known risk factors for suicide in older individuals, including loneliness, anxiety, and depression; increased alcohol use; and a perception of being a burden on society. Dr. de Leo directs a foundation dedicated to helping people experiencing traumatic bereavement, and in one recent week, the foundation was contacted by eight families in the province of Padua with a recent death by suicide apparently related to fallout from the COVID-19 pandemic. That’s an unusually high spike in suicide in a province with a population of 1 million.

“People probably preferred to end the agitation, the fear, the extreme anxiety about their destiny by deciding to prematurely truncate their life. That has been reported by nursing staff,” he said.

The Italian government has determined that, to date, 36% of all COVID-related deaths have occurred in people aged 85 years or older, and 84% of deaths were in individuals aged at least 70 years. And in Milan and the surrounding province of Lombardy, it’s estimated that COVID-19 has taken the lives of 25% of all nursing home residents. The North American experience has been uncomfortably similar.

“Almost 80% of COVID deaths in Canada have occurred in congregate settings,” observed Dr. Reichman, professor of psychiatry at the University of Toronto, and president and CEO of Baycrest Health Sciences, a geriatric research center.

“Certainly, the appalling number of deaths in nursing homes is the No. 1 horror of the pandemic,” declared Carmelle Peisah, MBBS, MD, a psychiatrist at the University of New South Wales in Kensington, Australia.
 

The fire next time

The conventional wisdom holds that COVID-19 has caused all sorts of mayhem in the delivery of elder care. Not so, in Dr. Reichman’s view.

“I would suggest that the pandemic has not caused many of the problems we talk about, it’s actually revealed problems that have always been there under the surface. For example, many older people, even before COVID-19, were socially isolated, socially distant. They had difficulty connecting with their relatives, difficulty accessing transportation to get to the store to buy food and see their doctors, and to interact with other older people,” the psychiatrist said.

“I would say as well that the pandemic didn’t cause the problems we’ve seen in long-term congregate senior care. The pandemic revealed them. We’ve had facilities where older people were severely crowded together, which compromises their quality of life, even when there’s not a pandemic. We’ve had difficulty staffing these kinds of environments with people that are paid an honest wage for the very hard work that they do. In many of these settings they’re inadequately trained, not only in infection prevention and control but in all other aspects of care. And the pandemic has revealed that many of these organizations are not properly funded. The government doesn’t support them well enough across jurisdictions, and they can’t raise enough philanthropic funds to provide the kind of quality of life that residents demand,” Dr. Reichman continued.

Could the pandemic spur improved elder care? His hope is that health care professionals, politicians, and society at large will learn from the devastation left by the first surge of the pandemic and will lobby for the resources necessary for much-needed improvements in geriatric care.

“We need to be better prepared should there be not only a second wave of this pandemic, but for other pandemics to come,” Dr. Reichman concluded.

The speakers indicated they had no financial conflicts regarding their presentations.

bjancin@mdedge.com

On March 11, 2020, the World Health Organization declared that coronavirus disease 2019 (COVID-19) was a pandemic.¹ As of mid-May 2020, the illness had claimed more than 316,000 lives worldwide.² The main symptoms of the respiratory illness caused by COVID-19 are fever, dry cough, and shortness of breath. However, disorders of consciousness also have been reported, especially in patients who succumb to the illness.³ In fact, approximately one-third of hospitalized COVID-19 patients experience neurologic symptoms.⁴ Although the most common of these symptoms are dizziness, headache, and loss of smell and taste, patients with more severe cases can experience acute cerebrovascular diseases and impaired consciousness.⁴ As such, psychiatrists assessing confusion should include COVID-19 in their differential diagnosis as a potential cause of altered mental status.

How COVID-19 might affect the CNS

Although primarily considered a respiratory illness, COVID-19 also may have neurotropic potential. The virus that causes COVID-19, severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2), is a beta-coronavirus. Two other highly pathogenic coronaviruses—SARS-CoV-1 and Middle East respiratory syndrome–related coronavirus (MERS-CoV)—are also beta-coronaviruses, and both have been reported to invade the CNS in some patients.⁵ These viruses are thought to invade cells via angiotensin-converting enzyme 2 (ACE2) receptors.⁶ These receptors are located on the epithelial cells of the respiratory and gastrointestinal (GI) tracts, but also are expressed in certain areas of the brain.⁷ Transmission to the brain could occur through various routes. However, the clinical symptom of loss of smell and taste hints to possible transmission of the virus from nasal cells to the olfactory bulb via trans-synaptic transmission in olfactory neurons.^5,8,9

Immune injury via systemic inflammation is another proposed mechanism for nervous system damage.^8,9 This has been described as “cytokine storm syndrome” and provides support to the role of immuno­therapy in COVID-19 patients.¹⁰ Such inflammation has been long hypothesized as a contributor to psychiatric illnesses, especially neurocognitive disorders.^11,12

Neuropsychiatric complications of COVID-19

Disorders of consciousness were identified early as a symptom of COVID-19.³ Subsequent studies and case reports have confirmed impaired consciousness as a possible symptom of COVID-19.⁴ The first case of encephalitis secondary to COVID-19 was reported by Chinese media on March 5, 2020 in Beijing, China.¹³ Subsequently, cases of encephalopathy secondary to COVID-19 have been reported in the United States. A 74-year-old man in Boca Raton, Florida who had recently returned from the Netherlands presented with altered mental status and was confirmed positive for COVID-19.¹⁴ A female airline worker in her late 50s who presented with altered mental status and tested positive for COVID-19 was found on imaging to have acute hemorrhagic necrotizing encephalopathy.¹⁵ There also have been cases of patients with confirmed COVID-19 who initially presented with complaints of seizures¹⁶ and Guillain-Barré syndrome.¹⁷ As such, neuro­psychiatric complications of COVID-19 are being increasingly recognized and are important to consider during psychiatric assessments.

Consider COVID-19 when assessing altered mental status

Psychiatrists are often consulted to assess patients with impaired consciousness, mental status changes, or confusion. Acute changes to mentation raise concern for delirium. In fact, delirium should always be ruled out when assessing new psychiatric symptoms. The astute psychiatrist is aware of the myriad of medical contributors to delirium. However, because knowledge of COVID-19 is in its infancy, it can be easy to overlook this virus as a potential contributor to delirium. Even patients whose confusion seems to be more in line with a major neurocognitive disorder should be evaluated for COVID-19, because the sudden onset of cognitive impairment may be due to hypoxia, inflammatory damage, or cerebrovascular changes secondary to infection with the virus or its respiratory complications, such as acute respiratory distress syndrome (ARDS).¹⁸

The most obvious clues to the possible presence of COVID-19 in a patient who is confused would be fever, dry cough, and shortness of breath. Because ACE2 receptors are also located in the GI tract, nausea, vomiting, and diarrhea also are possible. However, patients who are confused may be poor historians, demonstrating behavioral symptoms that might make physical assessments challenging, or simply may be pre- or asymptomatic carriers of the virus. Hence, a thorough review of the patient’s history and collateral information is invaluable. A recent history of travel or contact with COVID-19–positive individuals should raise suspicion for viral infection. A patient who mentions a loss of taste or smell would also alert the psychiatrist to the possibility of COVID-19. A patient might not directly state this information, but may mention that he/she has been eating less or has not been disturbed by odors. Neuroimaging can be useful because patients with severe cases are at increased risk for acute cerebrovascular diseases.⁴ Also, ordering a chest CT may prove helpful because this testing is highly sensitive for COVID-19.¹⁹ If there is sufficient clinical evidence to suspect viral infection, testing for COVID-19 should be performed immediately.

It is important to be vigilant for the possibility of COVID-19 infection in patients who present with confusion. Because the virus is highly contagious, the threshold for COVID-19 testing should be low. Viral infection in patients can manifest in ways other than classic respiratory symptoms. Psychiatrists should be aware of COVID-19’s potential to invade the CNS and cause neuropsychiatric symptoms. When assessing confusion in any setting, the clinical and historical clues for COVID-19 should be kept in mind. This will allow patients with COVID-19 to be quickly diagnosed to initiate appropriate management and minimize progression of the illness. Additionally, this will allow for efficient quarantine of the patient to prevent the spread of the virus to others. As such, psychiatrists can play an important role in containing this virus and resolving the COVID-19 pandemic.

Continue to: Bottom Line

Although primarily considered a respiratory illness, coronavirus disease 2019 (COVID-19) also may have the potential to invade the CNS and cause neuropsychiatric symptoms, such as impaired consciousness, encephalitis, or a loss of taste or smell. When assessing a patient who presents with confusion, be vigilant for the possibility of COVID-19.

Related Resources

• American Psychiatry Association. APA coronavirus resources. https://www.psychiatry.org/psychiatrists/covid-19-coronavirus#psych.
• Troyer EA, Kohn JN, Hong S. Are we facing a crashing wave of neuropsychiatric sequelae of COVID-19? Neuropsychiatric symptoms and potential immunologic mechanisms. Brain Behav Immun. 2020;S0889-1591(20)30489-X. doi: 10.1016/j.bbi.2020.04.027.

On March 11, 2020, the World Health Organization declared that coronavirus disease 2019 (COVID-19) was a pandemic.¹ As of mid-May 2020, the illness had claimed more than 316,000 lives worldwide.² The main symptoms of the respiratory illness caused by COVID-19 are fever, dry cough, and shortness of breath. However, disorders of consciousness also have been reported, especially in patients who succumb to the illness.³ In fact, approximately one-third of hospitalized COVID-19 patients experience neurologic symptoms.⁴ Although the most common of these symptoms are dizziness, headache, and loss of smell and taste, patients with more severe cases can experience acute cerebrovascular diseases and impaired consciousness.⁴ As such, psychiatrists assessing confusion should include COVID-19 in their differential diagnosis as a potential cause of altered mental status.

How COVID-19 might affect the CNS

Although primarily considered a respiratory illness, COVID-19 also may have neurotropic potential. The virus that causes COVID-19, severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2), is a beta-coronavirus. Two other highly pathogenic coronaviruses—SARS-CoV-1 and Middle East respiratory syndrome–related coronavirus (MERS-CoV)—are also beta-coronaviruses, and both have been reported to invade the CNS in some patients.⁵ These viruses are thought to invade cells via angiotensin-converting enzyme 2 (ACE2) receptors.⁶ These receptors are located on the epithelial cells of the respiratory and gastrointestinal (GI) tracts, but also are expressed in certain areas of the brain.⁷ Transmission to the brain could occur through various routes. However, the clinical symptom of loss of smell and taste hints to possible transmission of the virus from nasal cells to the olfactory bulb via trans-synaptic transmission in olfactory neurons.^5,8,9

Immune injury via systemic inflammation is another proposed mechanism for nervous system damage.^8,9 This has been described as “cytokine storm syndrome” and provides support to the role of immuno­therapy in COVID-19 patients.¹⁰ Such inflammation has been long hypothesized as a contributor to psychiatric illnesses, especially neurocognitive disorders.^11,12

Neuropsychiatric complications of COVID-19

Disorders of consciousness were identified early as a symptom of COVID-19.³ Subsequent studies and case reports have confirmed impaired consciousness as a possible symptom of COVID-19.⁴ The first case of encephalitis secondary to COVID-19 was reported by Chinese media on March 5, 2020 in Beijing, China.¹³ Subsequently, cases of encephalopathy secondary to COVID-19 have been reported in the United States. A 74-year-old man in Boca Raton, Florida who had recently returned from the Netherlands presented with altered mental status and was confirmed positive for COVID-19.¹⁴ A female airline worker in her late 50s who presented with altered mental status and tested positive for COVID-19 was found on imaging to have acute hemorrhagic necrotizing encephalopathy.¹⁵ There also have been cases of patients with confirmed COVID-19 who initially presented with complaints of seizures¹⁶ and Guillain-Barré syndrome.¹⁷ As such, neuro­psychiatric complications of COVID-19 are being increasingly recognized and are important to consider during psychiatric assessments.

Consider COVID-19 when assessing altered mental status

Psychiatrists are often consulted to assess patients with impaired consciousness, mental status changes, or confusion. Acute changes to mentation raise concern for delirium. In fact, delirium should always be ruled out when assessing new psychiatric symptoms. The astute psychiatrist is aware of the myriad of medical contributors to delirium. However, because knowledge of COVID-19 is in its infancy, it can be easy to overlook this virus as a potential contributor to delirium. Even patients whose confusion seems to be more in line with a major neurocognitive disorder should be evaluated for COVID-19, because the sudden onset of cognitive impairment may be due to hypoxia, inflammatory damage, or cerebrovascular changes secondary to infection with the virus or its respiratory complications, such as acute respiratory distress syndrome (ARDS).¹⁸

The most obvious clues to the possible presence of COVID-19 in a patient who is confused would be fever, dry cough, and shortness of breath. Because ACE2 receptors are also located in the GI tract, nausea, vomiting, and diarrhea also are possible. However, patients who are confused may be poor historians, demonstrating behavioral symptoms that might make physical assessments challenging, or simply may be pre- or asymptomatic carriers of the virus. Hence, a thorough review of the patient’s history and collateral information is invaluable. A recent history of travel or contact with COVID-19–positive individuals should raise suspicion for viral infection. A patient who mentions a loss of taste or smell would also alert the psychiatrist to the possibility of COVID-19. A patient might not directly state this information, but may mention that he/she has been eating less or has not been disturbed by odors. Neuroimaging can be useful because patients with severe cases are at increased risk for acute cerebrovascular diseases.⁴ Also, ordering a chest CT may prove helpful because this testing is highly sensitive for COVID-19.¹⁹ If there is sufficient clinical evidence to suspect viral infection, testing for COVID-19 should be performed immediately.

It is important to be vigilant for the possibility of COVID-19 infection in patients who present with confusion. Because the virus is highly contagious, the threshold for COVID-19 testing should be low. Viral infection in patients can manifest in ways other than classic respiratory symptoms. Psychiatrists should be aware of COVID-19’s potential to invade the CNS and cause neuropsychiatric symptoms. When assessing confusion in any setting, the clinical and historical clues for COVID-19 should be kept in mind. This will allow patients with COVID-19 to be quickly diagnosed to initiate appropriate management and minimize progression of the illness. Additionally, this will allow for efficient quarantine of the patient to prevent the spread of the virus to others. As such, psychiatrists can play an important role in containing this virus and resolving the COVID-19 pandemic.

Continue to: Bottom Line

Although primarily considered a respiratory illness, coronavirus disease 2019 (COVID-19) also may have the potential to invade the CNS and cause neuropsychiatric symptoms, such as impaired consciousness, encephalitis, or a loss of taste or smell. When assessing a patient who presents with confusion, be vigilant for the possibility of COVID-19.

Related Resources

• American Psychiatry Association. APA coronavirus resources. https://www.psychiatry.org/psychiatrists/covid-19-coronavirus#psych.
• Troyer EA, Kohn JN, Hong S. Are we facing a crashing wave of neuropsychiatric sequelae of COVID-19? Neuropsychiatric symptoms and potential immunologic mechanisms. Brain Behav Immun. 2020;S0889-1591(20)30489-X. doi: 10.1016/j.bbi.2020.04.027.

On March 11, 2020, the World Health Organization declared that coronavirus disease 2019 (COVID-19) was a pandemic.¹ As of mid-May 2020, the illness had claimed more than 316,000 lives worldwide.² The main symptoms of the respiratory illness caused by COVID-19 are fever, dry cough, and shortness of breath. However, disorders of consciousness also have been reported, especially in patients who succumb to the illness.³ In fact, approximately one-third of hospitalized COVID-19 patients experience neurologic symptoms.⁴ Although the most common of these symptoms are dizziness, headache, and loss of smell and taste, patients with more severe cases can experience acute cerebrovascular diseases and impaired consciousness.⁴ As such, psychiatrists assessing confusion should include COVID-19 in their differential diagnosis as a potential cause of altered mental status.

How COVID-19 might affect the CNS

Although primarily considered a respiratory illness, COVID-19 also may have neurotropic potential. The virus that causes COVID-19, severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2), is a beta-coronavirus. Two other highly pathogenic coronaviruses—SARS-CoV-1 and Middle East respiratory syndrome–related coronavirus (MERS-CoV)—are also beta-coronaviruses, and both have been reported to invade the CNS in some patients.⁵ These viruses are thought to invade cells via angiotensin-converting enzyme 2 (ACE2) receptors.⁶ These receptors are located on the epithelial cells of the respiratory and gastrointestinal (GI) tracts, but also are expressed in certain areas of the brain.⁷ Transmission to the brain could occur through various routes. However, the clinical symptom of loss of smell and taste hints to possible transmission of the virus from nasal cells to the olfactory bulb via trans-synaptic transmission in olfactory neurons.^5,8,9

Immune injury via systemic inflammation is another proposed mechanism for nervous system damage.^8,9 This has been described as “cytokine storm syndrome” and provides support to the role of immuno­therapy in COVID-19 patients.¹⁰ Such inflammation has been long hypothesized as a contributor to psychiatric illnesses, especially neurocognitive disorders.^11,12

Neuropsychiatric complications of COVID-19

Disorders of consciousness were identified early as a symptom of COVID-19.³ Subsequent studies and case reports have confirmed impaired consciousness as a possible symptom of COVID-19.⁴ The first case of encephalitis secondary to COVID-19 was reported by Chinese media on March 5, 2020 in Beijing, China.¹³ Subsequently, cases of encephalopathy secondary to COVID-19 have been reported in the United States. A 74-year-old man in Boca Raton, Florida who had recently returned from the Netherlands presented with altered mental status and was confirmed positive for COVID-19.¹⁴ A female airline worker in her late 50s who presented with altered mental status and tested positive for COVID-19 was found on imaging to have acute hemorrhagic necrotizing encephalopathy.¹⁵ There also have been cases of patients with confirmed COVID-19 who initially presented with complaints of seizures¹⁶ and Guillain-Barré syndrome.¹⁷ As such, neuro­psychiatric complications of COVID-19 are being increasingly recognized and are important to consider during psychiatric assessments.

Consider COVID-19 when assessing altered mental status

Psychiatrists are often consulted to assess patients with impaired consciousness, mental status changes, or confusion. Acute changes to mentation raise concern for delirium. In fact, delirium should always be ruled out when assessing new psychiatric symptoms. The astute psychiatrist is aware of the myriad of medical contributors to delirium. However, because knowledge of COVID-19 is in its infancy, it can be easy to overlook this virus as a potential contributor to delirium. Even patients whose confusion seems to be more in line with a major neurocognitive disorder should be evaluated for COVID-19, because the sudden onset of cognitive impairment may be due to hypoxia, inflammatory damage, or cerebrovascular changes secondary to infection with the virus or its respiratory complications, such as acute respiratory distress syndrome (ARDS).¹⁸

The most obvious clues to the possible presence of COVID-19 in a patient who is confused would be fever, dry cough, and shortness of breath. Because ACE2 receptors are also located in the GI tract, nausea, vomiting, and diarrhea also are possible. However, patients who are confused may be poor historians, demonstrating behavioral symptoms that might make physical assessments challenging, or simply may be pre- or asymptomatic carriers of the virus. Hence, a thorough review of the patient’s history and collateral information is invaluable. A recent history of travel or contact with COVID-19–positive individuals should raise suspicion for viral infection. A patient who mentions a loss of taste or smell would also alert the psychiatrist to the possibility of COVID-19. A patient might not directly state this information, but may mention that he/she has been eating less or has not been disturbed by odors. Neuroimaging can be useful because patients with severe cases are at increased risk for acute cerebrovascular diseases.⁴ Also, ordering a chest CT may prove helpful because this testing is highly sensitive for COVID-19.¹⁹ If there is sufficient clinical evidence to suspect viral infection, testing for COVID-19 should be performed immediately.

It is important to be vigilant for the possibility of COVID-19 infection in patients who present with confusion. Because the virus is highly contagious, the threshold for COVID-19 testing should be low. Viral infection in patients can manifest in ways other than classic respiratory symptoms. Psychiatrists should be aware of COVID-19’s potential to invade the CNS and cause neuropsychiatric symptoms. When assessing confusion in any setting, the clinical and historical clues for COVID-19 should be kept in mind. This will allow patients with COVID-19 to be quickly diagnosed to initiate appropriate management and minimize progression of the illness. Additionally, this will allow for efficient quarantine of the patient to prevent the spread of the virus to others. As such, psychiatrists can play an important role in containing this virus and resolving the COVID-19 pandemic.

Continue to: Bottom Line

Although primarily considered a respiratory illness, coronavirus disease 2019 (COVID-19) also may have the potential to invade the CNS and cause neuropsychiatric symptoms, such as impaired consciousness, encephalitis, or a loss of taste or smell. When assessing a patient who presents with confusion, be vigilant for the possibility of COVID-19.

Related Resources

• American Psychiatry Association. APA coronavirus resources. https://www.psychiatry.org/psychiatrists/covid-19-coronavirus#psych.
• Troyer EA, Kohn JN, Hong S. Are we facing a crashing wave of neuropsychiatric sequelae of COVID-19? Neuropsychiatric symptoms and potential immunologic mechanisms. Brain Behav Immun. 2020;S0889-1591(20)30489-X. doi: 10.1016/j.bbi.2020.04.027.

Higher cardiovascular risk burden, as measured by the Framingham General Cardiovascular Risk Score (FGCRS), is associated with neurodegenerative signs in the brain and may predict cognitive decline over time.

“In the absence of effective treatments for dementia, we need to monitor and control cardiovascular risk burden as a way to maintain patient’s cognitive health as they age,” said Weili Xu, PhD, Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China, in a press release.

“Given the progressive increase in the number of dementia cases worldwide, our findings have both clinical and public health relevance.”

Dr. Xu and first author Ruixue Song, MSc, also from Tianjin Medical University, published their findings online ahead of print May 18 in the Journal of the American College of Cardiology.

The World Health Organization projects that up to 82 million people will have dementia by 2050. Given the lack of effective treatments for dementia, identifying modifiable risk factors for cognitive decline and aggressively managing them is an increasingly appealing strategy.
 

Assessing cardiovascular risk and cognition

The researchers followed 1,588 dementia-free participants from the Rush Memory and Aging Project for 21 years (median, 5.8 years). FGCRS was assessed at baseline and categorized into tertiles (lowest, middle, and highest). Mean age of the studied population was 79.5 years, 75.8% of participants were female, and mean Framingham score was 15.6 (range, 4 to 28).

Annual evaluations included assessment of episodic memory (memory of everyday events), semantic memory (long-term memory), working memory (short-term memory), visuospatial ability (capacity to identify visual and spatial relationships among objects), and perceptual speed (ability to accurately and completely compare letters, numbers, objects, pictures, or patterns) using 19 tests to derive a composite score.

A subsample (n = 378) of participants underwent MRI, and structural total and regional brain volumes were estimated.

Linear regression was used to estimate beta-coefficients for the relationship between cardiovascular risk burden at baseline and longitudinally. If the beta-coefficient is negative, the interpretation is that for every 1-unit increase in the predictor variable (FGCRS), the outcome variable (cognitive function) will decrease by the beta-coefficient value.

At baseline, higher FGCRS was related to small but consistent (although not usually statistically significant) decreases in hippocampal volume, gray matter, and total brain volume.

Considered longitudinally, participants in the highest-risk tertile of FGCRS experienced faster decline in global cognition (beta = −0.019), episodic memory (beta = −0.023), working memory (beta = −0.021), and perceptual speed (beta = −0.027) during follow-up (P < .05 for all) than those in the lowest-risk tertile.

The declines in semantic memory (beta = –0.012) and visuospatial ability (beta = –0.010) did not reach statistical significance.

Bringing dementia prevention into the exam room early

Commenting on the research, Costantino Iadecola, MD, director of the Feil Family Brain and Mind Research Institute at Weill Cornell Medicine in New York City, said the study has immediate clinical usefulness.

“The link between the cardiovascular risk factors and dementia is well known, but in your doctor’s office, that link is not seen. If your GP or cardiologist sees you with high blood pressure, he’s not immediately going to think about the risk of dementia 20 years later,” said Dr. Iadecola.

“What this study does is it directly links a simple score that’s commonly used to assess cardiovascular risk to dementia risk, which can be used to counsel patients and, hopefully, reduce the risk of both cardiovascular disease and cognitive disorders.”

Dr. Iadecola wrote an editorial together with Neal S. Parikh, MD, MS, also from Weill Cornell Medicine, that accompanied the findings of the trial.

Even neurologists sometimes fail to make the connection between vascular risk and dementia, he said. “They think that by making a stroke patient move their hand better, they’re treating them, but 30% of stroke patients get dementia 6 or 8 months later and they’re missing this link between cerebrovascular pathology and dementia.

Dr. Iadecola is one of 26 experts who authored the recent Berlin Manifesto, an effort led by Vladimir Hachinski, MD, professor of neurology and epidemiology at Western University in Ontario, Canada, to raise awareness of the link between cardiovascular and brain health.

Dr. Hachinski coined the term “brain attack” and devised the Hachinski Ischemic Score that remains the standard for identifying a vascular component of cognitive impairment.

The current study has some strengths and limitations, noted Dr. Iadecola. The average age of participants was 80 years, which is appropriate given the high risk for cognitive decline at this age, but the generalizability of the study may be limited given that most participants were white women.

Going forward, he said, rigorous studies are needed to confirm these findings and to determine how to best prevent dementia through treatment of individual cardiovascular risk factors.

Dr. Xu has received grants from nonindustry entities, including the Swedish Research Council and the National Natural Science Foundation of China. The study was funded by the European Union’s Horizon 320230 research and innovation program. Dr. Iadecola is a member of the scientific advisory board for Broadview Ventures.

This article appeared on Medscape.com.

Higher cardiovascular risk burden, as measured by the Framingham General Cardiovascular Risk Score (FGCRS), is associated with neurodegenerative signs in the brain and may predict cognitive decline over time.

“In the absence of effective treatments for dementia, we need to monitor and control cardiovascular risk burden as a way to maintain patient’s cognitive health as they age,” said Weili Xu, PhD, Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China, in a press release.

“Given the progressive increase in the number of dementia cases worldwide, our findings have both clinical and public health relevance.”

Dr. Xu and first author Ruixue Song, MSc, also from Tianjin Medical University, published their findings online ahead of print May 18 in the Journal of the American College of Cardiology.

The World Health Organization projects that up to 82 million people will have dementia by 2050. Given the lack of effective treatments for dementia, identifying modifiable risk factors for cognitive decline and aggressively managing them is an increasingly appealing strategy.
 

Assessing cardiovascular risk and cognition

The researchers followed 1,588 dementia-free participants from the Rush Memory and Aging Project for 21 years (median, 5.8 years). FGCRS was assessed at baseline and categorized into tertiles (lowest, middle, and highest). Mean age of the studied population was 79.5 years, 75.8% of participants were female, and mean Framingham score was 15.6 (range, 4 to 28).

Annual evaluations included assessment of episodic memory (memory of everyday events), semantic memory (long-term memory), working memory (short-term memory), visuospatial ability (capacity to identify visual and spatial relationships among objects), and perceptual speed (ability to accurately and completely compare letters, numbers, objects, pictures, or patterns) using 19 tests to derive a composite score.

A subsample (n = 378) of participants underwent MRI, and structural total and regional brain volumes were estimated.

Linear regression was used to estimate beta-coefficients for the relationship between cardiovascular risk burden at baseline and longitudinally. If the beta-coefficient is negative, the interpretation is that for every 1-unit increase in the predictor variable (FGCRS), the outcome variable (cognitive function) will decrease by the beta-coefficient value.

At baseline, higher FGCRS was related to small but consistent (although not usually statistically significant) decreases in hippocampal volume, gray matter, and total brain volume.

Considered longitudinally, participants in the highest-risk tertile of FGCRS experienced faster decline in global cognition (beta = −0.019), episodic memory (beta = −0.023), working memory (beta = −0.021), and perceptual speed (beta = −0.027) during follow-up (P < .05 for all) than those in the lowest-risk tertile.

The declines in semantic memory (beta = –0.012) and visuospatial ability (beta = –0.010) did not reach statistical significance.

Bringing dementia prevention into the exam room early

Commenting on the research, Costantino Iadecola, MD, director of the Feil Family Brain and Mind Research Institute at Weill Cornell Medicine in New York City, said the study has immediate clinical usefulness.

“The link between the cardiovascular risk factors and dementia is well known, but in your doctor’s office, that link is not seen. If your GP or cardiologist sees you with high blood pressure, he’s not immediately going to think about the risk of dementia 20 years later,” said Dr. Iadecola.

“What this study does is it directly links a simple score that’s commonly used to assess cardiovascular risk to dementia risk, which can be used to counsel patients and, hopefully, reduce the risk of both cardiovascular disease and cognitive disorders.”

Dr. Iadecola wrote an editorial together with Neal S. Parikh, MD, MS, also from Weill Cornell Medicine, that accompanied the findings of the trial.

Even neurologists sometimes fail to make the connection between vascular risk and dementia, he said. “They think that by making a stroke patient move their hand better, they’re treating them, but 30% of stroke patients get dementia 6 or 8 months later and they’re missing this link between cerebrovascular pathology and dementia.

Dr. Iadecola is one of 26 experts who authored the recent Berlin Manifesto, an effort led by Vladimir Hachinski, MD, professor of neurology and epidemiology at Western University in Ontario, Canada, to raise awareness of the link between cardiovascular and brain health.

Dr. Hachinski coined the term “brain attack” and devised the Hachinski Ischemic Score that remains the standard for identifying a vascular component of cognitive impairment.

The current study has some strengths and limitations, noted Dr. Iadecola. The average age of participants was 80 years, which is appropriate given the high risk for cognitive decline at this age, but the generalizability of the study may be limited given that most participants were white women.

Going forward, he said, rigorous studies are needed to confirm these findings and to determine how to best prevent dementia through treatment of individual cardiovascular risk factors.

Dr. Xu has received grants from nonindustry entities, including the Swedish Research Council and the National Natural Science Foundation of China. The study was funded by the European Union’s Horizon 320230 research and innovation program. Dr. Iadecola is a member of the scientific advisory board for Broadview Ventures.

This article appeared on Medscape.com.

Higher cardiovascular risk burden, as measured by the Framingham General Cardiovascular Risk Score (FGCRS), is associated with neurodegenerative signs in the brain and may predict cognitive decline over time.

“In the absence of effective treatments for dementia, we need to monitor and control cardiovascular risk burden as a way to maintain patient’s cognitive health as they age,” said Weili Xu, PhD, Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China, in a press release.

“Given the progressive increase in the number of dementia cases worldwide, our findings have both clinical and public health relevance.”

Dr. Xu and first author Ruixue Song, MSc, also from Tianjin Medical University, published their findings online ahead of print May 18 in the Journal of the American College of Cardiology.

The World Health Organization projects that up to 82 million people will have dementia by 2050. Given the lack of effective treatments for dementia, identifying modifiable risk factors for cognitive decline and aggressively managing them is an increasingly appealing strategy.
 

Assessing cardiovascular risk and cognition

The researchers followed 1,588 dementia-free participants from the Rush Memory and Aging Project for 21 years (median, 5.8 years). FGCRS was assessed at baseline and categorized into tertiles (lowest, middle, and highest). Mean age of the studied population was 79.5 years, 75.8% of participants were female, and mean Framingham score was 15.6 (range, 4 to 28).

Annual evaluations included assessment of episodic memory (memory of everyday events), semantic memory (long-term memory), working memory (short-term memory), visuospatial ability (capacity to identify visual and spatial relationships among objects), and perceptual speed (ability to accurately and completely compare letters, numbers, objects, pictures, or patterns) using 19 tests to derive a composite score.

A subsample (n = 378) of participants underwent MRI, and structural total and regional brain volumes were estimated.

Linear regression was used to estimate beta-coefficients for the relationship between cardiovascular risk burden at baseline and longitudinally. If the beta-coefficient is negative, the interpretation is that for every 1-unit increase in the predictor variable (FGCRS), the outcome variable (cognitive function) will decrease by the beta-coefficient value.

At baseline, higher FGCRS was related to small but consistent (although not usually statistically significant) decreases in hippocampal volume, gray matter, and total brain volume.

Considered longitudinally, participants in the highest-risk tertile of FGCRS experienced faster decline in global cognition (beta = −0.019), episodic memory (beta = −0.023), working memory (beta = −0.021), and perceptual speed (beta = −0.027) during follow-up (P < .05 for all) than those in the lowest-risk tertile.

The declines in semantic memory (beta = –0.012) and visuospatial ability (beta = –0.010) did not reach statistical significance.

Bringing dementia prevention into the exam room early

Commenting on the research, Costantino Iadecola, MD, director of the Feil Family Brain and Mind Research Institute at Weill Cornell Medicine in New York City, said the study has immediate clinical usefulness.

“The link between the cardiovascular risk factors and dementia is well known, but in your doctor’s office, that link is not seen. If your GP or cardiologist sees you with high blood pressure, he’s not immediately going to think about the risk of dementia 20 years later,” said Dr. Iadecola.

“What this study does is it directly links a simple score that’s commonly used to assess cardiovascular risk to dementia risk, which can be used to counsel patients and, hopefully, reduce the risk of both cardiovascular disease and cognitive disorders.”

Dr. Iadecola wrote an editorial together with Neal S. Parikh, MD, MS, also from Weill Cornell Medicine, that accompanied the findings of the trial.

Even neurologists sometimes fail to make the connection between vascular risk and dementia, he said. “They think that by making a stroke patient move their hand better, they’re treating them, but 30% of stroke patients get dementia 6 or 8 months later and they’re missing this link between cerebrovascular pathology and dementia.

Dr. Iadecola is one of 26 experts who authored the recent Berlin Manifesto, an effort led by Vladimir Hachinski, MD, professor of neurology and epidemiology at Western University in Ontario, Canada, to raise awareness of the link between cardiovascular and brain health.

Dr. Hachinski coined the term “brain attack” and devised the Hachinski Ischemic Score that remains the standard for identifying a vascular component of cognitive impairment.

The current study has some strengths and limitations, noted Dr. Iadecola. The average age of participants was 80 years, which is appropriate given the high risk for cognitive decline at this age, but the generalizability of the study may be limited given that most participants were white women.

Going forward, he said, rigorous studies are needed to confirm these findings and to determine how to best prevent dementia through treatment of individual cardiovascular risk factors.

Dr. Xu has received grants from nonindustry entities, including the Swedish Research Council and the National Natural Science Foundation of China. The study was funded by the European Union’s Horizon 320230 research and innovation program. Dr. Iadecola is a member of the scientific advisory board for Broadview Ventures.

This article appeared on Medscape.com.

A meta-analysis of relevant clinical trials has found that lowering blood pressure with antihypertensive agents was statistically significantly associated with reducing the risk of dementia or cognitive impairment, though the risk reduction was modest.

“Although observational studies report hypertension to be an important risk factor for dementia, the benefit of blood pressure lowering on dementia or cognitive impairment in clinical trials is modest and lower than the risk reduction for stroke,” wrote Diarmaid Hughes, MB, of the NUI Galway and Saolta University Hospital Group in Galway, Ireland, and coauthors. They added, however, that “these findings have the potential to inform public health strategies to reduce the burden of dementia globally.” The study was published online ahead of print May 19 in JAMA.
 

A rich data set

To assess the relationship between lowering blood pressure and cognitive issues, the researchers performed a systemic search of randomized, clinical trials that compared blood pressure lowering via antihypertensive agents with a control, had at least 1 year of follow-up, included more than 1,000 participants, and reported on either dementia, cognitive impairment, cognitive decline, or a change in cognitive test scores as outcomes. Of the 14 studies deemed eligible, 12 reported either the incidence of dementia (n = 9) or a composite of dementia or cognitive impairment (n = 3) at follow-up and thus were included in the primary meta-analysis. The other two studies were used for secondary outcomes only.

The studies included 96,158 participants in total – 42.2% were women – and their mean age was 69 years. At baseline, participants’ mean systolic blood pressure was 154 mm Hg and their mean diastolic blood pressure was 83.3 mm Hg. The mean duration of follow-up was 49.24 months.

In the 12 trials that reported dementia or cognitive impairment, blood pressure lowering via antihypertensive agents, compared with control, was significantly associated with a reduction in those two outcomes (7.0% vs. 7.5% over a mean trial follow-up of 4.1 years; odds ratio, 0.93; 95% confidence interval, 0.88-0.98; absolute risk reduction, 0.39%; 95% CI, 0.09%-0.68%). Blood pressure lowering, compared with control, was also significantly associated with a reduction in cognitive decline (20.2% vs. 21.1% over a mean trial follow-up of 4.1 years; OR, 0.93; 95% CI, 0.88-0.99; ARR, 0.71%; 95% CI, 0.19%-1.2%) in the eight trials that reported it as an outcome. An analysis of the eight trials that reported a change in cognitive scores did not find a significant association between that outcome and blood pressure lowering.
 

Subpopulations should be examined

“This is a very broad brush stroke study, albeit a definitive one,” Richard J. Caselli, MD, of the Mayo Clinic in Phoenix said in an interview. “With all the thousands of people in this meta-analysis, there are going to be subpopulations of patients with certain characteristics or common conditions in which blood pressure lowering might have a bigger or a lesser impact on their risk factor. Is there a difference between certain racial groups? Does it matter what antihypertensive strategies are used? You can look at the interactions between blood pressure lowering and other conditions: diabetes, head injuries, air pollution, certain genetic risk factors. There are a number of additional findings that could come from a very rich data set like this.”

The authors acknowledged their study’s limitations, including the challenges of performing a meta-analysis of studies that drew from different populations and had potentially different definitions of dementia, cognitive impairment, and cognitive decline outcomes. In addition, the low incidence of dementia across clinical trials limited the researchers, and its underdetection in trials and the potential of survivor bias for healthier participants with blood pressure reductions were noted as “unmeasured sources of potential error.”

Three authors reported receiving grants or personal fees from the Wellcome Trust and the Health Research Board, the Chief Scientist Office, and Bayer AG, respectively.

SOURCE: Hughes D et al. JAMA. 2020 May 19. doi: 10.1001/jama.2020.4249.

A meta-analysis of relevant clinical trials has found that lowering blood pressure with antihypertensive agents was statistically significantly associated with reducing the risk of dementia or cognitive impairment, though the risk reduction was modest.

“Although observational studies report hypertension to be an important risk factor for dementia, the benefit of blood pressure lowering on dementia or cognitive impairment in clinical trials is modest and lower than the risk reduction for stroke,” wrote Diarmaid Hughes, MB, of the NUI Galway and Saolta University Hospital Group in Galway, Ireland, and coauthors. They added, however, that “these findings have the potential to inform public health strategies to reduce the burden of dementia globally.” The study was published online ahead of print May 19 in JAMA.
 

A rich data set

To assess the relationship between lowering blood pressure and cognitive issues, the researchers performed a systemic search of randomized, clinical trials that compared blood pressure lowering via antihypertensive agents with a control, had at least 1 year of follow-up, included more than 1,000 participants, and reported on either dementia, cognitive impairment, cognitive decline, or a change in cognitive test scores as outcomes. Of the 14 studies deemed eligible, 12 reported either the incidence of dementia (n = 9) or a composite of dementia or cognitive impairment (n = 3) at follow-up and thus were included in the primary meta-analysis. The other two studies were used for secondary outcomes only.

The studies included 96,158 participants in total – 42.2% were women – and their mean age was 69 years. At baseline, participants’ mean systolic blood pressure was 154 mm Hg and their mean diastolic blood pressure was 83.3 mm Hg. The mean duration of follow-up was 49.24 months.

In the 12 trials that reported dementia or cognitive impairment, blood pressure lowering via antihypertensive agents, compared with control, was significantly associated with a reduction in those two outcomes (7.0% vs. 7.5% over a mean trial follow-up of 4.1 years; odds ratio, 0.93; 95% confidence interval, 0.88-0.98; absolute risk reduction, 0.39%; 95% CI, 0.09%-0.68%). Blood pressure lowering, compared with control, was also significantly associated with a reduction in cognitive decline (20.2% vs. 21.1% over a mean trial follow-up of 4.1 years; OR, 0.93; 95% CI, 0.88-0.99; ARR, 0.71%; 95% CI, 0.19%-1.2%) in the eight trials that reported it as an outcome. An analysis of the eight trials that reported a change in cognitive scores did not find a significant association between that outcome and blood pressure lowering.
 

Subpopulations should be examined

“This is a very broad brush stroke study, albeit a definitive one,” Richard J. Caselli, MD, of the Mayo Clinic in Phoenix said in an interview. “With all the thousands of people in this meta-analysis, there are going to be subpopulations of patients with certain characteristics or common conditions in which blood pressure lowering might have a bigger or a lesser impact on their risk factor. Is there a difference between certain racial groups? Does it matter what antihypertensive strategies are used? You can look at the interactions between blood pressure lowering and other conditions: diabetes, head injuries, air pollution, certain genetic risk factors. There are a number of additional findings that could come from a very rich data set like this.”

The authors acknowledged their study’s limitations, including the challenges of performing a meta-analysis of studies that drew from different populations and had potentially different definitions of dementia, cognitive impairment, and cognitive decline outcomes. In addition, the low incidence of dementia across clinical trials limited the researchers, and its underdetection in trials and the potential of survivor bias for healthier participants with blood pressure reductions were noted as “unmeasured sources of potential error.”

Three authors reported receiving grants or personal fees from the Wellcome Trust and the Health Research Board, the Chief Scientist Office, and Bayer AG, respectively.

SOURCE: Hughes D et al. JAMA. 2020 May 19. doi: 10.1001/jama.2020.4249.

A meta-analysis of relevant clinical trials has found that lowering blood pressure with antihypertensive agents was statistically significantly associated with reducing the risk of dementia or cognitive impairment, though the risk reduction was modest.

“Although observational studies report hypertension to be an important risk factor for dementia, the benefit of blood pressure lowering on dementia or cognitive impairment in clinical trials is modest and lower than the risk reduction for stroke,” wrote Diarmaid Hughes, MB, of the NUI Galway and Saolta University Hospital Group in Galway, Ireland, and coauthors. They added, however, that “these findings have the potential to inform public health strategies to reduce the burden of dementia globally.” The study was published online ahead of print May 19 in JAMA.
 

A rich data set

To assess the relationship between lowering blood pressure and cognitive issues, the researchers performed a systemic search of randomized, clinical trials that compared blood pressure lowering via antihypertensive agents with a control, had at least 1 year of follow-up, included more than 1,000 participants, and reported on either dementia, cognitive impairment, cognitive decline, or a change in cognitive test scores as outcomes. Of the 14 studies deemed eligible, 12 reported either the incidence of dementia (n = 9) or a composite of dementia or cognitive impairment (n = 3) at follow-up and thus were included in the primary meta-analysis. The other two studies were used for secondary outcomes only.

The studies included 96,158 participants in total – 42.2% were women – and their mean age was 69 years. At baseline, participants’ mean systolic blood pressure was 154 mm Hg and their mean diastolic blood pressure was 83.3 mm Hg. The mean duration of follow-up was 49.24 months.

In the 12 trials that reported dementia or cognitive impairment, blood pressure lowering via antihypertensive agents, compared with control, was significantly associated with a reduction in those two outcomes (7.0% vs. 7.5% over a mean trial follow-up of 4.1 years; odds ratio, 0.93; 95% confidence interval, 0.88-0.98; absolute risk reduction, 0.39%; 95% CI, 0.09%-0.68%). Blood pressure lowering, compared with control, was also significantly associated with a reduction in cognitive decline (20.2% vs. 21.1% over a mean trial follow-up of 4.1 years; OR, 0.93; 95% CI, 0.88-0.99; ARR, 0.71%; 95% CI, 0.19%-1.2%) in the eight trials that reported it as an outcome. An analysis of the eight trials that reported a change in cognitive scores did not find a significant association between that outcome and blood pressure lowering.
 

Subpopulations should be examined

“This is a very broad brush stroke study, albeit a definitive one,” Richard J. Caselli, MD, of the Mayo Clinic in Phoenix said in an interview. “With all the thousands of people in this meta-analysis, there are going to be subpopulations of patients with certain characteristics or common conditions in which blood pressure lowering might have a bigger or a lesser impact on their risk factor. Is there a difference between certain racial groups? Does it matter what antihypertensive strategies are used? You can look at the interactions between blood pressure lowering and other conditions: diabetes, head injuries, air pollution, certain genetic risk factors. There are a number of additional findings that could come from a very rich data set like this.”

The authors acknowledged their study’s limitations, including the challenges of performing a meta-analysis of studies that drew from different populations and had potentially different definitions of dementia, cognitive impairment, and cognitive decline outcomes. In addition, the low incidence of dementia across clinical trials limited the researchers, and its underdetection in trials and the potential of survivor bias for healthier participants with blood pressure reductions were noted as “unmeasured sources of potential error.”

Three authors reported receiving grants or personal fees from the Wellcome Trust and the Health Research Board, the Chief Scientist Office, and Bayer AG, respectively.

SOURCE: Hughes D et al. JAMA. 2020 May 19. doi: 10.1001/jama.2020.4249.

New research shows that almost 5% of older British citizens have potentially serious brain abnormalities, including aneurysms, and about a third have blood test abnormalities. Knowing the expected prevalence of such incidental findings in the older general population is “extremely useful” for both researchers and clinicians, said study co-author Sarah Elisabeth Keuss, MBChB, clinical research associate, Dementia Research Centre, UCL Queen Square Institute of Neurology, London, UK.

“In research, the knowledge helps to inform study protocols regarding how to manage incidental findings and enables study participants to be appropriately informed,” said Dr. Keuss. Greater awareness also helps clinicians make decisions about whether or not to scan a patient, she said, adding that imaging is increasingly available to them. It allows clinicians to counsel patients regarding the probability of an incidental finding and balance that risk against the potential benefits of having a test.

The research is being presented online as part of the American Academy of Neurology 2020 Science Highlights. The incidental findings also were published last year in BMJ Open.

The new findings are from the first wave of data collection for the Insight 46 study, a neuroimaging substudy of the MRC National Survey of Health and Development (NSHD) 1946 British birth cohort, a broadly representative sample of the population born in mainland Britain during 1946. The research uses detailed brain imaging, cognitive testing, and blood and other biomarkers to investigate genetic and life-course factors associated with Alzheimer’s disease and cerebrovascular disease.

The current study included 502 individuals, aged about 71 years at the time of the analysis, and 49% were women. Almost all (93.8%) participants underwent 1-day MRI scans. Some 4.5% of these participants had an incidental finding of brain abnormality as per a prespecified standardized protocol.

Suspected vascular malformations were present in 1.9%, and suspected intracranial mass lesions were present in 1.5%. The single most common vascular abnormality was a suspected cerebral aneurysm, which affected 1.1% of participants.

Suspected meningiomas were the most common intracranial lesion, affecting 0.6% of study participants.
 

Action plan

Participants and their primary care provider were informed of findings “that were deemed to be potentially serious, or life-threatening, or could have a major impact on quality of life,” said Dr. Keuss. Relevant experts “came up with a recommended clinical action plan to help the primary care provider decide what should be the next course of action with regard to investigation or referral to another specialist,” said Dr. Keuss.

The new results are important for clinical decision-making, said Dr. Keuss. “Clinicians should consider the possibility of detecting an incidental finding whenever they’re requesting a brain scan. They should balance that risk against the possible benefits of recommending a test.”

The prevalence of incidental findings on MRI reported in the literature varies because of different methods used to review scans. “However, comparing our study with similar studies, the prevalence of the key findings with regard to aneurysms and intracranial mass lesions are very similar,” said Dr. Keuss.

Dr. Keuss and colleagues do not recommend all elderly patients get a brain scan.

“We don’t know what the long-term consequences are of being informed you have an incidental finding of an abnormality; we don’t know if it improves their outcome, and it potentially could cause anxiety,” said Dr. Keuss.
 

Psychological impact

The researchers have not looked at the psychological impact of negative findings on study participants, but they could do so at a later date.

“It would be very important to look into that given the potential to cause anxiety,” said Dr. Keuss. “It’s important to find out the potential negative consequences to inform researchers in future about how best to manage these findings.”

From blood tests, the analysis found that more than a third (34.6%) of participants had at least one related abnormality. The most common of these were kidney impairment (about 9%), thyroid function abnormalities (between 4% and 5%), anemia (about 4%), and low vitamin B₁₂ levels (about 3%).

However, few of these reached the prespecified threshold for urgent action, and Dr. Keuss noted these findings were not the focus of her AAN presentation.

A strength of the study was that participants were almost the exact same age.
 

Important issue

Commenting on the research, David S. Liebeskind, MD, professor of neurology and director, Neurovascular Imaging Research Core, University of California, Los Angeles, said it raises “a very interesting” and “important” public health issue.

“The question is whether we do things based around individual symptomatic status, or at a larger level in terms of public health, screening the larger population to figure out who is at risk for any particular disease or disorder.”

From the standpoint of imaging technologies like MRI that show details about brain structures, experts debate whether the population should be screened “before something occurs,” said Dr. Liebeskind. “Imaging has the capacity to tell us a tremendous amount; whether this implies we should therefore image everybody is a larger public health question.”

The issue is “fraught with a lot of difficulty and complexity” as treatment paradigms tend to be “built around symptomatic status,” he said. “When we sit in the office or with a patient at the bedside, we usually focus on that individual patient and not necessarily on the larger public.”

Dr. Liebeskind noted that the question of whether to put the emphasis on the individual patient or the public at large is also being discussed during the current COVID-19 pandemic.

He wasn’t surprised that the study uncovered incidental findings in almost 5% of the sample. “If you take an 80-year-old and study their brain, a good chunk, if not half or more, will have some abnormality,” he said.

Drs. Keuss and Liebeskind have reported no relevant financial relationships.

This article first appeared on Medscape.com.

New research shows that almost 5% of older British citizens have potentially serious brain abnormalities, including aneurysms, and about a third have blood test abnormalities. Knowing the expected prevalence of such incidental findings in the older general population is “extremely useful” for both researchers and clinicians, said study co-author Sarah Elisabeth Keuss, MBChB, clinical research associate, Dementia Research Centre, UCL Queen Square Institute of Neurology, London, UK.

“In research, the knowledge helps to inform study protocols regarding how to manage incidental findings and enables study participants to be appropriately informed,” said Dr. Keuss. Greater awareness also helps clinicians make decisions about whether or not to scan a patient, she said, adding that imaging is increasingly available to them. It allows clinicians to counsel patients regarding the probability of an incidental finding and balance that risk against the potential benefits of having a test.

The research is being presented online as part of the American Academy of Neurology 2020 Science Highlights. The incidental findings also were published last year in BMJ Open.

The new findings are from the first wave of data collection for the Insight 46 study, a neuroimaging substudy of the MRC National Survey of Health and Development (NSHD) 1946 British birth cohort, a broadly representative sample of the population born in mainland Britain during 1946. The research uses detailed brain imaging, cognitive testing, and blood and other biomarkers to investigate genetic and life-course factors associated with Alzheimer’s disease and cerebrovascular disease.

The current study included 502 individuals, aged about 71 years at the time of the analysis, and 49% were women. Almost all (93.8%) participants underwent 1-day MRI scans. Some 4.5% of these participants had an incidental finding of brain abnormality as per a prespecified standardized protocol.

Suspected vascular malformations were present in 1.9%, and suspected intracranial mass lesions were present in 1.5%. The single most common vascular abnormality was a suspected cerebral aneurysm, which affected 1.1% of participants.

Suspected meningiomas were the most common intracranial lesion, affecting 0.6% of study participants.
 

Action plan

Participants and their primary care provider were informed of findings “that were deemed to be potentially serious, or life-threatening, or could have a major impact on quality of life,” said Dr. Keuss. Relevant experts “came up with a recommended clinical action plan to help the primary care provider decide what should be the next course of action with regard to investigation or referral to another specialist,” said Dr. Keuss.

The new results are important for clinical decision-making, said Dr. Keuss. “Clinicians should consider the possibility of detecting an incidental finding whenever they’re requesting a brain scan. They should balance that risk against the possible benefits of recommending a test.”

The prevalence of incidental findings on MRI reported in the literature varies because of different methods used to review scans. “However, comparing our study with similar studies, the prevalence of the key findings with regard to aneurysms and intracranial mass lesions are very similar,” said Dr. Keuss.

Dr. Keuss and colleagues do not recommend all elderly patients get a brain scan.

“We don’t know what the long-term consequences are of being informed you have an incidental finding of an abnormality; we don’t know if it improves their outcome, and it potentially could cause anxiety,” said Dr. Keuss.
 

Psychological impact

The researchers have not looked at the psychological impact of negative findings on study participants, but they could do so at a later date.

“It would be very important to look into that given the potential to cause anxiety,” said Dr. Keuss. “It’s important to find out the potential negative consequences to inform researchers in future about how best to manage these findings.”

From blood tests, the analysis found that more than a third (34.6%) of participants had at least one related abnormality. The most common of these were kidney impairment (about 9%), thyroid function abnormalities (between 4% and 5%), anemia (about 4%), and low vitamin B₁₂ levels (about 3%).

However, few of these reached the prespecified threshold for urgent action, and Dr. Keuss noted these findings were not the focus of her AAN presentation.

A strength of the study was that participants were almost the exact same age.
 

Important issue

Commenting on the research, David S. Liebeskind, MD, professor of neurology and director, Neurovascular Imaging Research Core, University of California, Los Angeles, said it raises “a very interesting” and “important” public health issue.

“The question is whether we do things based around individual symptomatic status, or at a larger level in terms of public health, screening the larger population to figure out who is at risk for any particular disease or disorder.”

From the standpoint of imaging technologies like MRI that show details about brain structures, experts debate whether the population should be screened “before something occurs,” said Dr. Liebeskind. “Imaging has the capacity to tell us a tremendous amount; whether this implies we should therefore image everybody is a larger public health question.”

The issue is “fraught with a lot of difficulty and complexity” as treatment paradigms tend to be “built around symptomatic status,” he said. “When we sit in the office or with a patient at the bedside, we usually focus on that individual patient and not necessarily on the larger public.”

Dr. Liebeskind noted that the question of whether to put the emphasis on the individual patient or the public at large is also being discussed during the current COVID-19 pandemic.

He wasn’t surprised that the study uncovered incidental findings in almost 5% of the sample. “If you take an 80-year-old and study their brain, a good chunk, if not half or more, will have some abnormality,” he said.

Drs. Keuss and Liebeskind have reported no relevant financial relationships.

This article first appeared on Medscape.com.

New research shows that almost 5% of older British citizens have potentially serious brain abnormalities, including aneurysms, and about a third have blood test abnormalities. Knowing the expected prevalence of such incidental findings in the older general population is “extremely useful” for both researchers and clinicians, said study co-author Sarah Elisabeth Keuss, MBChB, clinical research associate, Dementia Research Centre, UCL Queen Square Institute of Neurology, London, UK.

“In research, the knowledge helps to inform study protocols regarding how to manage incidental findings and enables study participants to be appropriately informed,” said Dr. Keuss. Greater awareness also helps clinicians make decisions about whether or not to scan a patient, she said, adding that imaging is increasingly available to them. It allows clinicians to counsel patients regarding the probability of an incidental finding and balance that risk against the potential benefits of having a test.

The research is being presented online as part of the American Academy of Neurology 2020 Science Highlights. The incidental findings also were published last year in BMJ Open.

The new findings are from the first wave of data collection for the Insight 46 study, a neuroimaging substudy of the MRC National Survey of Health and Development (NSHD) 1946 British birth cohort, a broadly representative sample of the population born in mainland Britain during 1946. The research uses detailed brain imaging, cognitive testing, and blood and other biomarkers to investigate genetic and life-course factors associated with Alzheimer’s disease and cerebrovascular disease.

The current study included 502 individuals, aged about 71 years at the time of the analysis, and 49% were women. Almost all (93.8%) participants underwent 1-day MRI scans. Some 4.5% of these participants had an incidental finding of brain abnormality as per a prespecified standardized protocol.

Suspected vascular malformations were present in 1.9%, and suspected intracranial mass lesions were present in 1.5%. The single most common vascular abnormality was a suspected cerebral aneurysm, which affected 1.1% of participants.

Suspected meningiomas were the most common intracranial lesion, affecting 0.6% of study participants.
 

Action plan

Participants and their primary care provider were informed of findings “that were deemed to be potentially serious, or life-threatening, or could have a major impact on quality of life,” said Dr. Keuss. Relevant experts “came up with a recommended clinical action plan to help the primary care provider decide what should be the next course of action with regard to investigation or referral to another specialist,” said Dr. Keuss.

The new results are important for clinical decision-making, said Dr. Keuss. “Clinicians should consider the possibility of detecting an incidental finding whenever they’re requesting a brain scan. They should balance that risk against the possible benefits of recommending a test.”

The prevalence of incidental findings on MRI reported in the literature varies because of different methods used to review scans. “However, comparing our study with similar studies, the prevalence of the key findings with regard to aneurysms and intracranial mass lesions are very similar,” said Dr. Keuss.

Dr. Keuss and colleagues do not recommend all elderly patients get a brain scan.

“We don’t know what the long-term consequences are of being informed you have an incidental finding of an abnormality; we don’t know if it improves their outcome, and it potentially could cause anxiety,” said Dr. Keuss.
 

Psychological impact

The researchers have not looked at the psychological impact of negative findings on study participants, but they could do so at a later date.

“It would be very important to look into that given the potential to cause anxiety,” said Dr. Keuss. “It’s important to find out the potential negative consequences to inform researchers in future about how best to manage these findings.”

From blood tests, the analysis found that more than a third (34.6%) of participants had at least one related abnormality. The most common of these were kidney impairment (about 9%), thyroid function abnormalities (between 4% and 5%), anemia (about 4%), and low vitamin B₁₂ levels (about 3%).

However, few of these reached the prespecified threshold for urgent action, and Dr. Keuss noted these findings were not the focus of her AAN presentation.

A strength of the study was that participants were almost the exact same age.
 

Important issue

Commenting on the research, David S. Liebeskind, MD, professor of neurology and director, Neurovascular Imaging Research Core, University of California, Los Angeles, said it raises “a very interesting” and “important” public health issue.

“The question is whether we do things based around individual symptomatic status, or at a larger level in terms of public health, screening the larger population to figure out who is at risk for any particular disease or disorder.”

From the standpoint of imaging technologies like MRI that show details about brain structures, experts debate whether the population should be screened “before something occurs,” said Dr. Liebeskind. “Imaging has the capacity to tell us a tremendous amount; whether this implies we should therefore image everybody is a larger public health question.”

The issue is “fraught with a lot of difficulty and complexity” as treatment paradigms tend to be “built around symptomatic status,” he said. “When we sit in the office or with a patient at the bedside, we usually focus on that individual patient and not necessarily on the larger public.”

Dr. Liebeskind noted that the question of whether to put the emphasis on the individual patient or the public at large is also being discussed during the current COVID-19 pandemic.

He wasn’t surprised that the study uncovered incidental findings in almost 5% of the sample. “If you take an 80-year-old and study their brain, a good chunk, if not half or more, will have some abnormality,” he said.

Drs. Keuss and Liebeskind have reported no relevant financial relationships.

This article first appeared on Medscape.com.

Diastolic dysfunction, a common and often undiagnosed condition in older individuals, could be contributing to the increasing burden of cognitive decline, a new study suggests. “We found people with worsening diastolic dysfunction have more white matter hyperintensities on brain imaging and greater difficulty with executive functioning, suggesting that diastolic dysfunction is a common modifiable risk factor for cognitive impairment,” said lead author Alicia S. Parker, MD. Dr. Parker is assistant professor of cognitive and behavioral neurology at the Glenn Biggs Institute for Alzheimer’s and Neurodegenerative Diseases, University of Texas Health, San Antonio.

“This is an entirely new finding. While there have been some small studies suggesting a link between diastolic dysfunction and a reduction in working memory, this is by far the largest dataset on this topic and the first study that has included brain imaging and neuropsychological measures,” she said.

“Diastolic dysfunction is very common in the older population, and we need to do more to find it and treat it to help prevent or reduce cognitive decline,” Dr. Parker added.

This research is being presented online as part of the 2020 American Academy of Neurology Science Highlights.

Dr. Parker explained that systolic dysfunction is known to have a major effect on cardiovascular outcomes and has been found to be associated with cognitive decline. Proposed mechanisms for cognitive decline in patients with systolic dysfunction include low cardiac output, embolic infarctions, and hypoxic changes, among others.

“There is increasing interest in analyzing the influence of diastolic dysfunction on cardiovascular outcomes, and the effects of diastolic dysfunction on cognition are not currently well delineated, which this study seeks to address,” she added.

“While these results are new, they are not surprising. In general, we are finding more and more that heart health is connected to brain health,” she commented.

Dr. Parker and her colleagues started the current research after noticing in clinic that among patients with significant diastolic dysfunction, there were often changes on brain MRI imaging, and the patients often had trouble with executive function. “The effect of diastolic dysfunction on cognition has not been well characterized, so we wanted to look at this,” she said.

The investigators analyzed data from the Framingham Heart Study Offspring Cohort at examination 8, collected between 2005 and 2008. The study sample included 1,438 individuals older than 55 years who had undergone neuropsychological assessment and echocardiographic diastolic measurement. Systolic measurements were normal for the participants, and they did not currently have dementia, stroke, or other neurologic illness.

Results showed that increasing E/E’ ratio (the ratio of mitral peak velocity of early filling to early diastolic mitral annular velocity) indicated increasing diastolic dysfunction and was associated with an increase in the incidence of mild cognitive impairment (hazard ratio, 1.29; 95% confidence interval, 1.01-1.66; P < .043).

An increased E/E’ ratio was associated with increased executive function impairment in the “similarities” (beta, –0.29; P < .002) and “phonemic fluency” (–1.28; P < .001) tasks.

Participants with moderate to severe diastolic dysfunction were more impaired with respect to both similarities (–0.62; P < .046) and phonemic fluency (–2.60; P < .023).

Data from 1,217 participants showed that among those with mild diastolic dysfunction, there was a trend toward an increase in white matter hyperintensities (0.11; P < .105). For participants with moderate to severe diastolic dysfunction, white matter hyperintensities were increased (0.30; P < 0.001).

The results were unchanged after the researchers adjusted for many other predictors of cognitive decline affecting diastolic function.

The researchers conclude: “As cerebral small vessel disease clinically presents with executive dysfunction, these results align well.” They add that replication in additional cohorts and analyses of cognition in treatment trials of diastolic dysfunction are warranted.

Earlier interventions

Commenting on the study, Marco R. Di Tullio, MD, professor of medicine and Columbia University Medical Center, New York City, who is also studying the relationship between subclinical cardiac abnormalities and cognition, said: “This is a promising area of research, as it might allow us to uncover novel risk factors for cognitive decline at an early stage, before the development of clinically manifest cardiac disease, which might allow earlier interventions to decrease or delay the onset of cognitive decline.”

Dr. Di Tullio added that he would like to know more about the interaction between diastolic dysfunction, MRI abnormalities, and cognitive impairment risk. “In this study, MRI abnormalities and cognitive impairment are treated as separate outcomes, with diastolic dysfunction being the exposure for each of them. An additional analysis of the association between diastolic dysfunction and cognitive impairment stratified by presence or absence of brain MRI findings would have been interesting.”

Dr. Parker responded that this is an area of investigation. “We suspect that our cognitive findings would not be explained by any one MRI measure, though a comprehensive examination of MRI findings would be of benefit. The thought that there may be a reversible cardiac abnormality that does not have a structural brain imaging correlate on MRI is an interesting possibility,” she said.

Dr. Di Tullio also pointed out that at present, there is no specific treatment for diastolic dysfunction other than to address some the conditions that predispose to it, such as hypertension and atrial fibrillation.

“We completely agree that specific treatments are an area of investigation and that treatment is therefore targeted at associated modifiable conditions,” Dr. Parker replied.

With regard to more specific estimates of the prevalence of diastolic dysfunction, Dr. Parker cites another Framingham analysis that involved 2,355 persons without any prevalent cardiovascular conditions. That study found that diastolic dysfunction was rare until 50 years of age and then gradually increased with age.

About 5% of people in their 50s had mild diastolic dysfunction, and about 3% had moderate to severe diastolic dysfunction. Among persons in their 60s, about 18% had mild and 5% had severe diastolic dysfunction. Among persons in their 70s, mild diastolic dysfunction occurred in 35%, and moderate to severe disease was present in 18%; and in persons older than 80 years, nearly half had mild and about 20% had moderate to severe diastolic dysfunction.

Dr. Parker has disclosed no relevant financial relationships.

This article first appeared on Medscape.com.

Diastolic dysfunction, a common and often undiagnosed condition in older individuals, could be contributing to the increasing burden of cognitive decline, a new study suggests. “We found people with worsening diastolic dysfunction have more white matter hyperintensities on brain imaging and greater difficulty with executive functioning, suggesting that diastolic dysfunction is a common modifiable risk factor for cognitive impairment,” said lead author Alicia S. Parker, MD. Dr. Parker is assistant professor of cognitive and behavioral neurology at the Glenn Biggs Institute for Alzheimer’s and Neurodegenerative Diseases, University of Texas Health, San Antonio.

“This is an entirely new finding. While there have been some small studies suggesting a link between diastolic dysfunction and a reduction in working memory, this is by far the largest dataset on this topic and the first study that has included brain imaging and neuropsychological measures,” she said.

“Diastolic dysfunction is very common in the older population, and we need to do more to find it and treat it to help prevent or reduce cognitive decline,” Dr. Parker added.

This research is being presented online as part of the 2020 American Academy of Neurology Science Highlights.

Dr. Parker explained that systolic dysfunction is known to have a major effect on cardiovascular outcomes and has been found to be associated with cognitive decline. Proposed mechanisms for cognitive decline in patients with systolic dysfunction include low cardiac output, embolic infarctions, and hypoxic changes, among others.

“There is increasing interest in analyzing the influence of diastolic dysfunction on cardiovascular outcomes, and the effects of diastolic dysfunction on cognition are not currently well delineated, which this study seeks to address,” she added.

“While these results are new, they are not surprising. In general, we are finding more and more that heart health is connected to brain health,” she commented.

Dr. Parker and her colleagues started the current research after noticing in clinic that among patients with significant diastolic dysfunction, there were often changes on brain MRI imaging, and the patients often had trouble with executive function. “The effect of diastolic dysfunction on cognition has not been well characterized, so we wanted to look at this,” she said.

The investigators analyzed data from the Framingham Heart Study Offspring Cohort at examination 8, collected between 2005 and 2008. The study sample included 1,438 individuals older than 55 years who had undergone neuropsychological assessment and echocardiographic diastolic measurement. Systolic measurements were normal for the participants, and they did not currently have dementia, stroke, or other neurologic illness.

Results showed that increasing E/E’ ratio (the ratio of mitral peak velocity of early filling to early diastolic mitral annular velocity) indicated increasing diastolic dysfunction and was associated with an increase in the incidence of mild cognitive impairment (hazard ratio, 1.29; 95% confidence interval, 1.01-1.66; P < .043).

An increased E/E’ ratio was associated with increased executive function impairment in the “similarities” (beta, –0.29; P < .002) and “phonemic fluency” (–1.28; P < .001) tasks.

Participants with moderate to severe diastolic dysfunction were more impaired with respect to both similarities (–0.62; P < .046) and phonemic fluency (–2.60; P < .023).

Data from 1,217 participants showed that among those with mild diastolic dysfunction, there was a trend toward an increase in white matter hyperintensities (0.11; P < .105). For participants with moderate to severe diastolic dysfunction, white matter hyperintensities were increased (0.30; P < 0.001).

The results were unchanged after the researchers adjusted for many other predictors of cognitive decline affecting diastolic function.

The researchers conclude: “As cerebral small vessel disease clinically presents with executive dysfunction, these results align well.” They add that replication in additional cohorts and analyses of cognition in treatment trials of diastolic dysfunction are warranted.

Earlier interventions

Commenting on the study, Marco R. Di Tullio, MD, professor of medicine and Columbia University Medical Center, New York City, who is also studying the relationship between subclinical cardiac abnormalities and cognition, said: “This is a promising area of research, as it might allow us to uncover novel risk factors for cognitive decline at an early stage, before the development of clinically manifest cardiac disease, which might allow earlier interventions to decrease or delay the onset of cognitive decline.”

Dr. Di Tullio added that he would like to know more about the interaction between diastolic dysfunction, MRI abnormalities, and cognitive impairment risk. “In this study, MRI abnormalities and cognitive impairment are treated as separate outcomes, with diastolic dysfunction being the exposure for each of them. An additional analysis of the association between diastolic dysfunction and cognitive impairment stratified by presence or absence of brain MRI findings would have been interesting.”

Dr. Parker responded that this is an area of investigation. “We suspect that our cognitive findings would not be explained by any one MRI measure, though a comprehensive examination of MRI findings would be of benefit. The thought that there may be a reversible cardiac abnormality that does not have a structural brain imaging correlate on MRI is an interesting possibility,” she said.

Dr. Di Tullio also pointed out that at present, there is no specific treatment for diastolic dysfunction other than to address some the conditions that predispose to it, such as hypertension and atrial fibrillation.

“We completely agree that specific treatments are an area of investigation and that treatment is therefore targeted at associated modifiable conditions,” Dr. Parker replied.

With regard to more specific estimates of the prevalence of diastolic dysfunction, Dr. Parker cites another Framingham analysis that involved 2,355 persons without any prevalent cardiovascular conditions. That study found that diastolic dysfunction was rare until 50 years of age and then gradually increased with age.

About 5% of people in their 50s had mild diastolic dysfunction, and about 3% had moderate to severe diastolic dysfunction. Among persons in their 60s, about 18% had mild and 5% had severe diastolic dysfunction. Among persons in their 70s, mild diastolic dysfunction occurred in 35%, and moderate to severe disease was present in 18%; and in persons older than 80 years, nearly half had mild and about 20% had moderate to severe diastolic dysfunction.

Dr. Parker has disclosed no relevant financial relationships.

This article first appeared on Medscape.com.

Diastolic dysfunction, a common and often undiagnosed condition in older individuals, could be contributing to the increasing burden of cognitive decline, a new study suggests. “We found people with worsening diastolic dysfunction have more white matter hyperintensities on brain imaging and greater difficulty with executive functioning, suggesting that diastolic dysfunction is a common modifiable risk factor for cognitive impairment,” said lead author Alicia S. Parker, MD. Dr. Parker is assistant professor of cognitive and behavioral neurology at the Glenn Biggs Institute for Alzheimer’s and Neurodegenerative Diseases, University of Texas Health, San Antonio.

“This is an entirely new finding. While there have been some small studies suggesting a link between diastolic dysfunction and a reduction in working memory, this is by far the largest dataset on this topic and the first study that has included brain imaging and neuropsychological measures,” she said.

“Diastolic dysfunction is very common in the older population, and we need to do more to find it and treat it to help prevent or reduce cognitive decline,” Dr. Parker added.

This research is being presented online as part of the 2020 American Academy of Neurology Science Highlights.

Dr. Parker explained that systolic dysfunction is known to have a major effect on cardiovascular outcomes and has been found to be associated with cognitive decline. Proposed mechanisms for cognitive decline in patients with systolic dysfunction include low cardiac output, embolic infarctions, and hypoxic changes, among others.

“There is increasing interest in analyzing the influence of diastolic dysfunction on cardiovascular outcomes, and the effects of diastolic dysfunction on cognition are not currently well delineated, which this study seeks to address,” she added.

“While these results are new, they are not surprising. In general, we are finding more and more that heart health is connected to brain health,” she commented.

Dr. Parker and her colleagues started the current research after noticing in clinic that among patients with significant diastolic dysfunction, there were often changes on brain MRI imaging, and the patients often had trouble with executive function. “The effect of diastolic dysfunction on cognition has not been well characterized, so we wanted to look at this,” she said.

The investigators analyzed data from the Framingham Heart Study Offspring Cohort at examination 8, collected between 2005 and 2008. The study sample included 1,438 individuals older than 55 years who had undergone neuropsychological assessment and echocardiographic diastolic measurement. Systolic measurements were normal for the participants, and they did not currently have dementia, stroke, or other neurologic illness.

Results showed that increasing E/E’ ratio (the ratio of mitral peak velocity of early filling to early diastolic mitral annular velocity) indicated increasing diastolic dysfunction and was associated with an increase in the incidence of mild cognitive impairment (hazard ratio, 1.29; 95% confidence interval, 1.01-1.66; P < .043).

An increased E/E’ ratio was associated with increased executive function impairment in the “similarities” (beta, –0.29; P < .002) and “phonemic fluency” (–1.28; P < .001) tasks.

Participants with moderate to severe diastolic dysfunction were more impaired with respect to both similarities (–0.62; P < .046) and phonemic fluency (–2.60; P < .023).

Data from 1,217 participants showed that among those with mild diastolic dysfunction, there was a trend toward an increase in white matter hyperintensities (0.11; P < .105). For participants with moderate to severe diastolic dysfunction, white matter hyperintensities were increased (0.30; P < 0.001).

The results were unchanged after the researchers adjusted for many other predictors of cognitive decline affecting diastolic function.

The researchers conclude: “As cerebral small vessel disease clinically presents with executive dysfunction, these results align well.” They add that replication in additional cohorts and analyses of cognition in treatment trials of diastolic dysfunction are warranted.

Earlier interventions

Commenting on the study, Marco R. Di Tullio, MD, professor of medicine and Columbia University Medical Center, New York City, who is also studying the relationship between subclinical cardiac abnormalities and cognition, said: “This is a promising area of research, as it might allow us to uncover novel risk factors for cognitive decline at an early stage, before the development of clinically manifest cardiac disease, which might allow earlier interventions to decrease or delay the onset of cognitive decline.”

Dr. Di Tullio added that he would like to know more about the interaction between diastolic dysfunction, MRI abnormalities, and cognitive impairment risk. “In this study, MRI abnormalities and cognitive impairment are treated as separate outcomes, with diastolic dysfunction being the exposure for each of them. An additional analysis of the association between diastolic dysfunction and cognitive impairment stratified by presence or absence of brain MRI findings would have been interesting.”

Dr. Parker responded that this is an area of investigation. “We suspect that our cognitive findings would not be explained by any one MRI measure, though a comprehensive examination of MRI findings would be of benefit. The thought that there may be a reversible cardiac abnormality that does not have a structural brain imaging correlate on MRI is an interesting possibility,” she said.

Dr. Di Tullio also pointed out that at present, there is no specific treatment for diastolic dysfunction other than to address some the conditions that predispose to it, such as hypertension and atrial fibrillation.

“We completely agree that specific treatments are an area of investigation and that treatment is therefore targeted at associated modifiable conditions,” Dr. Parker replied.

With regard to more specific estimates of the prevalence of diastolic dysfunction, Dr. Parker cites another Framingham analysis that involved 2,355 persons without any prevalent cardiovascular conditions. That study found that diastolic dysfunction was rare until 50 years of age and then gradually increased with age.

About 5% of people in their 50s had mild diastolic dysfunction, and about 3% had moderate to severe diastolic dysfunction. Among persons in their 60s, about 18% had mild and 5% had severe diastolic dysfunction. Among persons in their 70s, mild diastolic dysfunction occurred in 35%, and moderate to severe disease was present in 18%; and in persons older than 80 years, nearly half had mild and about 20% had moderate to severe diastolic dysfunction.

Dr. Parker has disclosed no relevant financial relationships.

This article first appeared on Medscape.com.

Treatment with a PCSK9 inhibitor, as well as achieving dramatically lowered cholesterol levels, did not mess with patients’ minds. Results from a cognition self-assessment completed by more than 22,000 patients when they finished participation in the FOURIER pivotal outcomes trial for evolocumab showed no signal of mental harm from either treatment with this PCSK9 inhibitor or from reaching a serum level of low-density lipoprotein cholesterol (LDL-C) of less than 20 mg/dL.

“We observed that patients treated with evolocumab, as well as those who achieved progressively very low LDL-C at 4 weeks in the FOURIER trial, had similar self-reported cognition in comparison with those receiving placebo and those with higher achieved LDL-C levels,” wrote a team of researchers from the trial in an article published online on May 4 (J Am Coll Cardiol. 2020 May 12;75[18]: 2283-93). “These data confirm the neurocognitive safety of intensive LDL-C reduction with evolocumab while reducing recurrent CV [cardiovascular] events in high-risk patients, and suggest that very low achieved LDL-C levels may be safely targeted for high-risk patients.”

The findings added to prior results documenting the cognitive safety of evolocumab (Repatha) from a much smaller FOURIER substudy that involved more intensive testing, the EBBINGHAUS (Evaluating PCSK9 Binding Antibody Influence on Cognitive Health in High Cardiovascular Risk Subjects) study with 1,204 patients drawn from the broader study and tested after a median 19 months on treatment (N Engl J Med. 2017 Aug 17;377[17]: 633-43), as well as reports of neurocognitive safety for the other U.S. approved PCSK9 (proprotein convertase subtilisin kexin 9) inhibitor, alirocumab (Praluent) (N Engl J Med. 2015 Apr 16;372[16]:1489-99), various statins (J Gen Intern Med. 2015 Mar;30[3]: 348-58), and a third type of LDL-C–lowering agent, ezetimibe (JAMA Cardiol. 2017 May;2[5]:547-55).

Despite this evidence from across several drug classes that all cut LDL-C a long-standing but unsubstantiated belief persists among some that lipid lowering, especially by statins, blunts mental function, misinformation that’s easy to find on the Internet. “I estimate that about 20% of patients prescribed a statin won’t take it because of something they’ve heard” including that statins make you stupid. “It’s hard to undo that,” said Robert P. Giugliano, MD, a cardiologist at Brigham and Women’s Hospital in Boston and senior author for the new FOURIER study as well as for EBBINGHAUS. The same stigma has not gained nearly as much traction for PCSK9 inhibitors, however, and Dr. Giugliano said he has also recently sensed what may be a downtrend in statin apprehension.

“The information added by this study is very important,” commented Massimo R. Mannarino, MD, an atherosclerotic disease researcher at the University of Perugia (Italy). “The prejudice and misinformation regarding possible side effects of statins among patients and also some physicians unfortunately remains very strong today,” he said in an interview. “My impression is that PCSK9 inhibitors are less affected by this negative bias and are seen as a safer alternative to statins.” Concerns about PCSK9 inhibitors have especially focused on “the possible risks from very low cholesterol levels on the brain.” The evidence from both studies and clinical experience “allows for a very positive opinion about the efficacy and safety of PCSK9 inhibitors, although the long-term effects still require a few more years of observation,” said Dr. Mannarino, who led a review of the evidence that clears this class from links to neurocognitive loss (J Clin Lipid. 2018 Sep 1;12[5]:1123-32).

FOURIER (Further Cardiovascular Outcomes Research With PCSK9 Inhibition in Subjects With Elevated Risk) randomized 27,564 patients with atherosclerotic cardiovascular disease and elevated LDL cholesterol despite maximally tolerated standard treatment. Treatment with evolocumab for a median of 2.2 years resulted in a statistically significant 15% reduction in the study’s primary efficacy endpoint, compared with placebo (N Engl J Med. 2017 May 4;376[18]:1713-22), and led to the drug receiving an indication for lowering rates of MI, stroke, and symptom-driven coronary revascularization.

The prespecified substudy reported by Dr. Giugliano and his associates focused on a 23-question, validated, self-assessment survey of cognitive function completed by 22,655 of the FOURIER patients (82%). The more than 4,900 other patients in the study who did not complete the survey had modestly higher prevalence rates of various comorbidities at baseline, and also higher rates of adverse outcomes during follow-up, and in many cases these adverse outcome may have contributed to these patients not being able to complete their end-of-study cognitive assessment. For example, almost a quarter of the patients who did not complete their end-of-study cognitive assessment failed to do so because they had already died.

Overall, the prevalence of patients indicating a cognitive decline was virtually identical among 11,363 patients who had been maintained on evolocumab, with a 3.7% rate, and the 11,292 patients in the placebo group, with a 3.6% rate. When analyzed by achieved level of LDL-C after 4 weeks on treatment, the 2,338 patients with a level below 20 mg/dL had a 3.8% rate of self-reported cognitive loss, compared with a 4.5% rate among 3,613 patients who had an LDL-C level of at least 100 mg/dL when measured 4 weeks into the study.

One of the strengths of the new cognitive analysis is that, although it did not use the more sophisticated assessment tests employed on fewer patients in the EBBINGHAUS substudy, it used the Everyday Cognition scale (Neuropsychiatry. 2008 Jul;22[4]: 531-44). “We asked patients what they have experienced, and in the end that is what’s important, so this adds to the neurocognitive testing,” run in EBBINGHAUS, Dr. Giugliano said in an interview.

“The neurocognitive results in the present study were self-reported, and that might be a limitation, as it is less specific and objective, but it is also a strength, as it could be more sensitive” especially for a “nocebo effect common to all lipid-lowering drugs linked to the bad reputation historically attributed to statins,” Dr. Mannarino said.

Should the new FOURIER data “be interpreted as definitive evidence that intensive LDL-C lowering with PCSK9 monoclonal antibodies has no major harmful cognitive effects, at least over a period of 3 years? The answer appears to be a qualified yes, but with three important caveats,” Jennifer G. Robinson, MD, a professor of epidemiology at the University of Iowa College of Public Health in Iowa City, said in an editorial that accompanied the new report (J Am Coll Cardiol. 2020 May 12;75[18]:2294-6). Her three caveats are the missing 18% of patients who never took the end-of-study assessment, the relative paucity of patients at very advanced age in FOURIER, in which patients averaged 62.5 years old, and the exclusion from FOURIER of patients with a history of hemorrhagic stroke. Dr. Robinson also cited the 2.2 year median follow-up as leaving unsettled the potential cognitive impact of longer treatment.

In response, Dr. Giugliano noted that the very large size of FOURIER and the 22,655 patients who completed their survey provided substantial numbers of patients to address some of these concerns in robust subgroup analyses. For example, the new report showed no signal of excess cognitive complaints with evolocumab treatment among 1,999 patients who were at least 75 years old when entering the study, or in more than 5,000 patients with a history of cerebrovascular disease at baseline, or in 1,990 patients with a history of a nonstroke neurologic disease. In addition, while he conceded that the 18% of patients not accounted for in the new study placed some limits on generalizability of the findings, he also maintained that this unavoidable failure to collect data from a modest percentage of patients doesn’t scuttle the overarching signal of cognitive safety for most patients. And regarding the duration of treatment monitored, he noted that 5-year follow-up cognitive assessments are planned.

FOURIER was sponsored by Amgen, the company that markets evolocumab (Repatha). Dr. Giugliano has received personal fees and research support from Amgen and from several other companies. Dr. Mannarino had no disclosures. Dr. Robinson has been a consultant to The Medicines Company, Novartis, and Pfizer, and she has received research funding to her institution from Amgen and several other companies.

mzoler@mdedge.com

SOURCE: Gencer B et al. J Am Coll Cardiol. 2020 May 12;75[18]:2283-93.

Correction: Dr. Giugliano's name was misspelled in an earlier version of this article.

Treatment with a PCSK9 inhibitor, as well as achieving dramatically lowered cholesterol levels, did not mess with patients’ minds. Results from a cognition self-assessment completed by more than 22,000 patients when they finished participation in the FOURIER pivotal outcomes trial for evolocumab showed no signal of mental harm from either treatment with this PCSK9 inhibitor or from reaching a serum level of low-density lipoprotein cholesterol (LDL-C) of less than 20 mg/dL.

“We observed that patients treated with evolocumab, as well as those who achieved progressively very low LDL-C at 4 weeks in the FOURIER trial, had similar self-reported cognition in comparison with those receiving placebo and those with higher achieved LDL-C levels,” wrote a team of researchers from the trial in an article published online on May 4 (J Am Coll Cardiol. 2020 May 12;75[18]: 2283-93). “These data confirm the neurocognitive safety of intensive LDL-C reduction with evolocumab while reducing recurrent CV [cardiovascular] events in high-risk patients, and suggest that very low achieved LDL-C levels may be safely targeted for high-risk patients.”

The findings added to prior results documenting the cognitive safety of evolocumab (Repatha) from a much smaller FOURIER substudy that involved more intensive testing, the EBBINGHAUS (Evaluating PCSK9 Binding Antibody Influence on Cognitive Health in High Cardiovascular Risk Subjects) study with 1,204 patients drawn from the broader study and tested after a median 19 months on treatment (N Engl J Med. 2017 Aug 17;377[17]: 633-43), as well as reports of neurocognitive safety for the other U.S. approved PCSK9 (proprotein convertase subtilisin kexin 9) inhibitor, alirocumab (Praluent) (N Engl J Med. 2015 Apr 16;372[16]:1489-99), various statins (J Gen Intern Med. 2015 Mar;30[3]: 348-58), and a third type of LDL-C–lowering agent, ezetimibe (JAMA Cardiol. 2017 May;2[5]:547-55).

Despite this evidence from across several drug classes that all cut LDL-C a long-standing but unsubstantiated belief persists among some that lipid lowering, especially by statins, blunts mental function, misinformation that’s easy to find on the Internet. “I estimate that about 20% of patients prescribed a statin won’t take it because of something they’ve heard” including that statins make you stupid. “It’s hard to undo that,” said Robert P. Giugliano, MD, a cardiologist at Brigham and Women’s Hospital in Boston and senior author for the new FOURIER study as well as for EBBINGHAUS. The same stigma has not gained nearly as much traction for PCSK9 inhibitors, however, and Dr. Giugliano said he has also recently sensed what may be a downtrend in statin apprehension.

“The information added by this study is very important,” commented Massimo R. Mannarino, MD, an atherosclerotic disease researcher at the University of Perugia (Italy). “The prejudice and misinformation regarding possible side effects of statins among patients and also some physicians unfortunately remains very strong today,” he said in an interview. “My impression is that PCSK9 inhibitors are less affected by this negative bias and are seen as a safer alternative to statins.” Concerns about PCSK9 inhibitors have especially focused on “the possible risks from very low cholesterol levels on the brain.” The evidence from both studies and clinical experience “allows for a very positive opinion about the efficacy and safety of PCSK9 inhibitors, although the long-term effects still require a few more years of observation,” said Dr. Mannarino, who led a review of the evidence that clears this class from links to neurocognitive loss (J Clin Lipid. 2018 Sep 1;12[5]:1123-32).

FOURIER (Further Cardiovascular Outcomes Research With PCSK9 Inhibition in Subjects With Elevated Risk) randomized 27,564 patients with atherosclerotic cardiovascular disease and elevated LDL cholesterol despite maximally tolerated standard treatment. Treatment with evolocumab for a median of 2.2 years resulted in a statistically significant 15% reduction in the study’s primary efficacy endpoint, compared with placebo (N Engl J Med. 2017 May 4;376[18]:1713-22), and led to the drug receiving an indication for lowering rates of MI, stroke, and symptom-driven coronary revascularization.

The prespecified substudy reported by Dr. Giugliano and his associates focused on a 23-question, validated, self-assessment survey of cognitive function completed by 22,655 of the FOURIER patients (82%). The more than 4,900 other patients in the study who did not complete the survey had modestly higher prevalence rates of various comorbidities at baseline, and also higher rates of adverse outcomes during follow-up, and in many cases these adverse outcome may have contributed to these patients not being able to complete their end-of-study cognitive assessment. For example, almost a quarter of the patients who did not complete their end-of-study cognitive assessment failed to do so because they had already died.

Overall, the prevalence of patients indicating a cognitive decline was virtually identical among 11,363 patients who had been maintained on evolocumab, with a 3.7% rate, and the 11,292 patients in the placebo group, with a 3.6% rate. When analyzed by achieved level of LDL-C after 4 weeks on treatment, the 2,338 patients with a level below 20 mg/dL had a 3.8% rate of self-reported cognitive loss, compared with a 4.5% rate among 3,613 patients who had an LDL-C level of at least 100 mg/dL when measured 4 weeks into the study.

One of the strengths of the new cognitive analysis is that, although it did not use the more sophisticated assessment tests employed on fewer patients in the EBBINGHAUS substudy, it used the Everyday Cognition scale (Neuropsychiatry. 2008 Jul;22[4]: 531-44). “We asked patients what they have experienced, and in the end that is what’s important, so this adds to the neurocognitive testing,” run in EBBINGHAUS, Dr. Giugliano said in an interview.

“The neurocognitive results in the present study were self-reported, and that might be a limitation, as it is less specific and objective, but it is also a strength, as it could be more sensitive” especially for a “nocebo effect common to all lipid-lowering drugs linked to the bad reputation historically attributed to statins,” Dr. Mannarino said.

Should the new FOURIER data “be interpreted as definitive evidence that intensive LDL-C lowering with PCSK9 monoclonal antibodies has no major harmful cognitive effects, at least over a period of 3 years? The answer appears to be a qualified yes, but with three important caveats,” Jennifer G. Robinson, MD, a professor of epidemiology at the University of Iowa College of Public Health in Iowa City, said in an editorial that accompanied the new report (J Am Coll Cardiol. 2020 May 12;75[18]:2294-6). Her three caveats are the missing 18% of patients who never took the end-of-study assessment, the relative paucity of patients at very advanced age in FOURIER, in which patients averaged 62.5 years old, and the exclusion from FOURIER of patients with a history of hemorrhagic stroke. Dr. Robinson also cited the 2.2 year median follow-up as leaving unsettled the potential cognitive impact of longer treatment.

In response, Dr. Giugliano noted that the very large size of FOURIER and the 22,655 patients who completed their survey provided substantial numbers of patients to address some of these concerns in robust subgroup analyses. For example, the new report showed no signal of excess cognitive complaints with evolocumab treatment among 1,999 patients who were at least 75 years old when entering the study, or in more than 5,000 patients with a history of cerebrovascular disease at baseline, or in 1,990 patients with a history of a nonstroke neurologic disease. In addition, while he conceded that the 18% of patients not accounted for in the new study placed some limits on generalizability of the findings, he also maintained that this unavoidable failure to collect data from a modest percentage of patients doesn’t scuttle the overarching signal of cognitive safety for most patients. And regarding the duration of treatment monitored, he noted that 5-year follow-up cognitive assessments are planned.

FOURIER was sponsored by Amgen, the company that markets evolocumab (Repatha). Dr. Giugliano has received personal fees and research support from Amgen and from several other companies. Dr. Mannarino had no disclosures. Dr. Robinson has been a consultant to The Medicines Company, Novartis, and Pfizer, and she has received research funding to her institution from Amgen and several other companies.

mzoler@mdedge.com

SOURCE: Gencer B et al. J Am Coll Cardiol. 2020 May 12;75[18]:2283-93.

Correction: Dr. Giugliano's name was misspelled in an earlier version of this article.

Treatment with a PCSK9 inhibitor, as well as achieving dramatically lowered cholesterol levels, did not mess with patients’ minds. Results from a cognition self-assessment completed by more than 22,000 patients when they finished participation in the FOURIER pivotal outcomes trial for evolocumab showed no signal of mental harm from either treatment with this PCSK9 inhibitor or from reaching a serum level of low-density lipoprotein cholesterol (LDL-C) of less than 20 mg/dL.

“We observed that patients treated with evolocumab, as well as those who achieved progressively very low LDL-C at 4 weeks in the FOURIER trial, had similar self-reported cognition in comparison with those receiving placebo and those with higher achieved LDL-C levels,” wrote a team of researchers from the trial in an article published online on May 4 (J Am Coll Cardiol. 2020 May 12;75[18]: 2283-93). “These data confirm the neurocognitive safety of intensive LDL-C reduction with evolocumab while reducing recurrent CV [cardiovascular] events in high-risk patients, and suggest that very low achieved LDL-C levels may be safely targeted for high-risk patients.”

The findings added to prior results documenting the cognitive safety of evolocumab (Repatha) from a much smaller FOURIER substudy that involved more intensive testing, the EBBINGHAUS (Evaluating PCSK9 Binding Antibody Influence on Cognitive Health in High Cardiovascular Risk Subjects) study with 1,204 patients drawn from the broader study and tested after a median 19 months on treatment (N Engl J Med. 2017 Aug 17;377[17]: 633-43), as well as reports of neurocognitive safety for the other U.S. approved PCSK9 (proprotein convertase subtilisin kexin 9) inhibitor, alirocumab (Praluent) (N Engl J Med. 2015 Apr 16;372[16]:1489-99), various statins (J Gen Intern Med. 2015 Mar;30[3]: 348-58), and a third type of LDL-C–lowering agent, ezetimibe (JAMA Cardiol. 2017 May;2[5]:547-55).

Despite this evidence from across several drug classes that all cut LDL-C a long-standing but unsubstantiated belief persists among some that lipid lowering, especially by statins, blunts mental function, misinformation that’s easy to find on the Internet. “I estimate that about 20% of patients prescribed a statin won’t take it because of something they’ve heard” including that statins make you stupid. “It’s hard to undo that,” said Robert P. Giugliano, MD, a cardiologist at Brigham and Women’s Hospital in Boston and senior author for the new FOURIER study as well as for EBBINGHAUS. The same stigma has not gained nearly as much traction for PCSK9 inhibitors, however, and Dr. Giugliano said he has also recently sensed what may be a downtrend in statin apprehension.

“The information added by this study is very important,” commented Massimo R. Mannarino, MD, an atherosclerotic disease researcher at the University of Perugia (Italy). “The prejudice and misinformation regarding possible side effects of statins among patients and also some physicians unfortunately remains very strong today,” he said in an interview. “My impression is that PCSK9 inhibitors are less affected by this negative bias and are seen as a safer alternative to statins.” Concerns about PCSK9 inhibitors have especially focused on “the possible risks from very low cholesterol levels on the brain.” The evidence from both studies and clinical experience “allows for a very positive opinion about the efficacy and safety of PCSK9 inhibitors, although the long-term effects still require a few more years of observation,” said Dr. Mannarino, who led a review of the evidence that clears this class from links to neurocognitive loss (J Clin Lipid. 2018 Sep 1;12[5]:1123-32).

FOURIER (Further Cardiovascular Outcomes Research With PCSK9 Inhibition in Subjects With Elevated Risk) randomized 27,564 patients with atherosclerotic cardiovascular disease and elevated LDL cholesterol despite maximally tolerated standard treatment. Treatment with evolocumab for a median of 2.2 years resulted in a statistically significant 15% reduction in the study’s primary efficacy endpoint, compared with placebo (N Engl J Med. 2017 May 4;376[18]:1713-22), and led to the drug receiving an indication for lowering rates of MI, stroke, and symptom-driven coronary revascularization.

The prespecified substudy reported by Dr. Giugliano and his associates focused on a 23-question, validated, self-assessment survey of cognitive function completed by 22,655 of the FOURIER patients (82%). The more than 4,900 other patients in the study who did not complete the survey had modestly higher prevalence rates of various comorbidities at baseline, and also higher rates of adverse outcomes during follow-up, and in many cases these adverse outcome may have contributed to these patients not being able to complete their end-of-study cognitive assessment. For example, almost a quarter of the patients who did not complete their end-of-study cognitive assessment failed to do so because they had already died.

Overall, the prevalence of patients indicating a cognitive decline was virtually identical among 11,363 patients who had been maintained on evolocumab, with a 3.7% rate, and the 11,292 patients in the placebo group, with a 3.6% rate. When analyzed by achieved level of LDL-C after 4 weeks on treatment, the 2,338 patients with a level below 20 mg/dL had a 3.8% rate of self-reported cognitive loss, compared with a 4.5% rate among 3,613 patients who had an LDL-C level of at least 100 mg/dL when measured 4 weeks into the study.

One of the strengths of the new cognitive analysis is that, although it did not use the more sophisticated assessment tests employed on fewer patients in the EBBINGHAUS substudy, it used the Everyday Cognition scale (Neuropsychiatry. 2008 Jul;22[4]: 531-44). “We asked patients what they have experienced, and in the end that is what’s important, so this adds to the neurocognitive testing,” run in EBBINGHAUS, Dr. Giugliano said in an interview.

“The neurocognitive results in the present study were self-reported, and that might be a limitation, as it is less specific and objective, but it is also a strength, as it could be more sensitive” especially for a “nocebo effect common to all lipid-lowering drugs linked to the bad reputation historically attributed to statins,” Dr. Mannarino said.

Should the new FOURIER data “be interpreted as definitive evidence that intensive LDL-C lowering with PCSK9 monoclonal antibodies has no major harmful cognitive effects, at least over a period of 3 years? The answer appears to be a qualified yes, but with three important caveats,” Jennifer G. Robinson, MD, a professor of epidemiology at the University of Iowa College of Public Health in Iowa City, said in an editorial that accompanied the new report (J Am Coll Cardiol. 2020 May 12;75[18]:2294-6). Her three caveats are the missing 18% of patients who never took the end-of-study assessment, the relative paucity of patients at very advanced age in FOURIER, in which patients averaged 62.5 years old, and the exclusion from FOURIER of patients with a history of hemorrhagic stroke. Dr. Robinson also cited the 2.2 year median follow-up as leaving unsettled the potential cognitive impact of longer treatment.

In response, Dr. Giugliano noted that the very large size of FOURIER and the 22,655 patients who completed their survey provided substantial numbers of patients to address some of these concerns in robust subgroup analyses. For example, the new report showed no signal of excess cognitive complaints with evolocumab treatment among 1,999 patients who were at least 75 years old when entering the study, or in more than 5,000 patients with a history of cerebrovascular disease at baseline, or in 1,990 patients with a history of a nonstroke neurologic disease. In addition, while he conceded that the 18% of patients not accounted for in the new study placed some limits on generalizability of the findings, he also maintained that this unavoidable failure to collect data from a modest percentage of patients doesn’t scuttle the overarching signal of cognitive safety for most patients. And regarding the duration of treatment monitored, he noted that 5-year follow-up cognitive assessments are planned.

FOURIER was sponsored by Amgen, the company that markets evolocumab (Repatha). Dr. Giugliano has received personal fees and research support from Amgen and from several other companies. Dr. Mannarino had no disclosures. Dr. Robinson has been a consultant to The Medicines Company, Novartis, and Pfizer, and she has received research funding to her institution from Amgen and several other companies.

mzoler@mdedge.com

SOURCE: Gencer B et al. J Am Coll Cardiol. 2020 May 12;75[18]:2283-93.

Correction: Dr. Giugliano's name was misspelled in an earlier version of this article.