Literature Review

Clinical question: What risk factors could predict the likelihood of Pseudomonas and methicillin-resistant Staphylococcus aureus (MRSA) in patients hospitalized with healthcare-associated pneumonia (HCAP)?

Background: Patients identified with HCAP have an increased risk for multi-drug-resistant pathogens, such as gram-negative (GNR) organisms and MRSA. Meeting criteria for HCAP does not discriminate between the different infections, which require different antibiotic classes for treatment. Risk factors need to be identified to determine the most likely infectious organism to help guide initial empiric antibiotic therapy.

Study design: Retrospective cohort study.

Setting: Veterans Affairs hospitals.

Synopsis: Of 61,651 veterans with HCAP diagnosis, 1,156 (1.9%) had a discharge diagnosis of Pseudomonas pneumonia and were found to be younger and more likely to be immunocompromised; have hemiplegia; have a history of chronic obstructive pulmonary disease; have had corticosteroid exposure; and have been exposed to a fluoroquinolone, β-lactam, cephalosporin, or carbapenem antiobiotic within 90 days prior to admission. Pseudomonas pneumonia was negatively associated with age >84, drug abuse, diabetes, and higher socioeconomic status. A discharge diagnosis of MRSA pneumonia was found in 641 patients (1.0%), who also were positively associated with the male gender, age >74, recent nursing home stay, and recent exposure to fluoroquinolone antibiotics within 90 days prior to admission.

MRSA pneumonia was negatively associated with complicated diabetes. Neither diagnosis was present in 59,854 patients (97.1%).

This study was limited due to its predominantly male veteran population, low incidence of Pseudomonas and MRSA pneumonia being identified, and Pseudomonas as the only GNR organism analyzed.

Bottom line: Risk factors identified for Pseudomonas and MRSA pneumonia can help guide targeted antibiotics for HCAP patients.

Citation: Metersky ML, Frei CR, Mortenson EM. Predictors of Pseudomonas and methicillin-resistant Staphylococcus aureus in hospitalized patients with healthcare-associated pneumonia. Respirology. 2016;21(1):157-163.

Short Take

Hematuria as Marker of Urologic Cancer

Narrative literature review did not demonstrate beneficial role of screening urinalysis for cancer detection in asymptomatic patients, but it did suggest including gross hematuria as part of routine review of systems.

Citation: Nielsen M, Qaseem A, High Value Care Task Force of the American College of Physicians. Hematuria as a marker of occult urinary tract cancer: advice for high-value care from the American College of Physicians. Ann Intern Med. 2016;164(7):488-497. doi:10.7326/M15-1496.

Clinical question: What risk factors could predict the likelihood of Pseudomonas and methicillin-resistant Staphylococcus aureus (MRSA) in patients hospitalized with healthcare-associated pneumonia (HCAP)?

Background: Patients identified with HCAP have an increased risk for multi-drug-resistant pathogens, such as gram-negative (GNR) organisms and MRSA. Meeting criteria for HCAP does not discriminate between the different infections, which require different antibiotic classes for treatment. Risk factors need to be identified to determine the most likely infectious organism to help guide initial empiric antibiotic therapy.

Study design: Retrospective cohort study.

Setting: Veterans Affairs hospitals.

Synopsis: Of 61,651 veterans with HCAP diagnosis, 1,156 (1.9%) had a discharge diagnosis of Pseudomonas pneumonia and were found to be younger and more likely to be immunocompromised; have hemiplegia; have a history of chronic obstructive pulmonary disease; have had corticosteroid exposure; and have been exposed to a fluoroquinolone, β-lactam, cephalosporin, or carbapenem antiobiotic within 90 days prior to admission. Pseudomonas pneumonia was negatively associated with age >84, drug abuse, diabetes, and higher socioeconomic status. A discharge diagnosis of MRSA pneumonia was found in 641 patients (1.0%), who also were positively associated with the male gender, age >74, recent nursing home stay, and recent exposure to fluoroquinolone antibiotics within 90 days prior to admission.

MRSA pneumonia was negatively associated with complicated diabetes. Neither diagnosis was present in 59,854 patients (97.1%).

This study was limited due to its predominantly male veteran population, low incidence of Pseudomonas and MRSA pneumonia being identified, and Pseudomonas as the only GNR organism analyzed.

Bottom line: Risk factors identified for Pseudomonas and MRSA pneumonia can help guide targeted antibiotics for HCAP patients.

Citation: Metersky ML, Frei CR, Mortenson EM. Predictors of Pseudomonas and methicillin-resistant Staphylococcus aureus in hospitalized patients with healthcare-associated pneumonia. Respirology. 2016;21(1):157-163.

Short Take

Hematuria as Marker of Urologic Cancer

Narrative literature review did not demonstrate beneficial role of screening urinalysis for cancer detection in asymptomatic patients, but it did suggest including gross hematuria as part of routine review of systems.

Citation: Nielsen M, Qaseem A, High Value Care Task Force of the American College of Physicians. Hematuria as a marker of occult urinary tract cancer: advice for high-value care from the American College of Physicians. Ann Intern Med. 2016;164(7):488-497. doi:10.7326/M15-1496.

Clinical question: What risk factors could predict the likelihood of Pseudomonas and methicillin-resistant Staphylococcus aureus (MRSA) in patients hospitalized with healthcare-associated pneumonia (HCAP)?

Background: Patients identified with HCAP have an increased risk for multi-drug-resistant pathogens, such as gram-negative (GNR) organisms and MRSA. Meeting criteria for HCAP does not discriminate between the different infections, which require different antibiotic classes for treatment. Risk factors need to be identified to determine the most likely infectious organism to help guide initial empiric antibiotic therapy.

Study design: Retrospective cohort study.

Setting: Veterans Affairs hospitals.

Synopsis: Of 61,651 veterans with HCAP diagnosis, 1,156 (1.9%) had a discharge diagnosis of Pseudomonas pneumonia and were found to be younger and more likely to be immunocompromised; have hemiplegia; have a history of chronic obstructive pulmonary disease; have had corticosteroid exposure; and have been exposed to a fluoroquinolone, β-lactam, cephalosporin, or carbapenem antiobiotic within 90 days prior to admission. Pseudomonas pneumonia was negatively associated with age >84, drug abuse, diabetes, and higher socioeconomic status. A discharge diagnosis of MRSA pneumonia was found in 641 patients (1.0%), who also were positively associated with the male gender, age >74, recent nursing home stay, and recent exposure to fluoroquinolone antibiotics within 90 days prior to admission.

MRSA pneumonia was negatively associated with complicated diabetes. Neither diagnosis was present in 59,854 patients (97.1%).

This study was limited due to its predominantly male veteran population, low incidence of Pseudomonas and MRSA pneumonia being identified, and Pseudomonas as the only GNR organism analyzed.

Bottom line: Risk factors identified for Pseudomonas and MRSA pneumonia can help guide targeted antibiotics for HCAP patients.

Citation: Metersky ML, Frei CR, Mortenson EM. Predictors of Pseudomonas and methicillin-resistant Staphylococcus aureus in hospitalized patients with healthcare-associated pneumonia. Respirology. 2016;21(1):157-163.

Short Take

Hematuria as Marker of Urologic Cancer

Narrative literature review did not demonstrate beneficial role of screening urinalysis for cancer detection in asymptomatic patients, but it did suggest including gross hematuria as part of routine review of systems.

Citation: Nielsen M, Qaseem A, High Value Care Task Force of the American College of Physicians. Hematuria as a marker of occult urinary tract cancer: advice for high-value care from the American College of Physicians. Ann Intern Med. 2016;164(7):488-497. doi:10.7326/M15-1496.

CHICAGO—One-third of a large cohort of patients with an implantable cardiac device in place at the time of an ischemic stroke had one or more episodes of atrial fibrillation within the previous 30 days, Rhea C. Pimentel, MD, said at the 65th Annual Meeting of the American College of Cardiology.

The in-hospital mortality rate of these atrial fibrillation–related strokes was high: 11 of 42 (26%) patients with this event died during their stroke hospitalization, compared with six of 83 (7%) patients whose strokes were not temporally related to atrial fibrillation, said Dr. Pimentel, an electrophysiologist at the University of Kansas Medical Center in Kansas City.

Data from the Framingham Heart Study and other sources suggest that stroke in patients with atrial fibrillation entails about double the mortality rate of strokes in patients without atrial fibrillation. Mortality associated with atrial fibrillation–related stroke in the study was probably much higher because the hospital serves as a comprehensive stroke center and admits patients from across the Midwest, she said.

Dr. Pimentel reported data on 125 patients who presented with an ischemic stroke when a cardiac monitoring device was in place. This study is described as the largest patient series ever reported. Patients’ mean age was 73, and 41% were women. The mean CHADS2 score was 3.96 and the mean CHA2DS2-VASc score was 5.28. Of the patients, 62% had a pacemaker; the rest had an implantable cardioverter-defibrillator or cardiac resynchronization device. One-quarter of the group had a prior history of atrial fibrillation, and a fifth were on an oral anticoagulant—warfarin, in 70% of cases—at the time of their stroke.

Investigators defined a stroke-related atrial fibrillation episode as a total of at least one hour spent in atrial fibrillation at 30 days preceding the stroke. Eighty percent of affected patients had paroxysmal atrial fibrillation. They typically fulfilled the one-hour atrial fibrillation requirement with multiple short, self-terminated episodes rather than with an hour-long episode.

Being on an oral anticoagulant had no impact on in-hospital mortality rate, which was 14.2% in patients on warfarin or a newer anticoagulant and 14.3% in those who were not. Dr. Pimentel presented the results of the investigators’ initial look at the data. They are in the process of obtaining the patients’ international normalized ratio data, which “should be enlightening,” she said.

She and her coinvestigators also plan to subdivide their 30-day study period into five-day segments to learn how soon after an atrial fibrillation episode the strokes occurred. Researchers at Stanford University have reported that the greatest stroke risk in patients with atrial fibrillation occurs during the first five days after an atrial fibrillation episode. Dr. Pimentel’s group would like to confirm that observation.

In addition, because it remains an unresolved question whether any amount of atrial fibrillation is safe, Dr. Pimentel and her coworkers are considering reanalyzing their data using a cutoff of six minutes of atrial fibrillation rather than one hour during the 30 days prior to stroke.

—Bruce Jancin

CHICAGO—One-third of a large cohort of patients with an implantable cardiac device in place at the time of an ischemic stroke had one or more episodes of atrial fibrillation within the previous 30 days, Rhea C. Pimentel, MD, said at the 65th Annual Meeting of the American College of Cardiology.

The in-hospital mortality rate of these atrial fibrillation–related strokes was high: 11 of 42 (26%) patients with this event died during their stroke hospitalization, compared with six of 83 (7%) patients whose strokes were not temporally related to atrial fibrillation, said Dr. Pimentel, an electrophysiologist at the University of Kansas Medical Center in Kansas City.

Data from the Framingham Heart Study and other sources suggest that stroke in patients with atrial fibrillation entails about double the mortality rate of strokes in patients without atrial fibrillation. Mortality associated with atrial fibrillation–related stroke in the study was probably much higher because the hospital serves as a comprehensive stroke center and admits patients from across the Midwest, she said.

Dr. Pimentel reported data on 125 patients who presented with an ischemic stroke when a cardiac monitoring device was in place. This study is described as the largest patient series ever reported. Patients’ mean age was 73, and 41% were women. The mean CHADS2 score was 3.96 and the mean CHA2DS2-VASc score was 5.28. Of the patients, 62% had a pacemaker; the rest had an implantable cardioverter-defibrillator or cardiac resynchronization device. One-quarter of the group had a prior history of atrial fibrillation, and a fifth were on an oral anticoagulant—warfarin, in 70% of cases—at the time of their stroke.

Investigators defined a stroke-related atrial fibrillation episode as a total of at least one hour spent in atrial fibrillation at 30 days preceding the stroke. Eighty percent of affected patients had paroxysmal atrial fibrillation. They typically fulfilled the one-hour atrial fibrillation requirement with multiple short, self-terminated episodes rather than with an hour-long episode.

Being on an oral anticoagulant had no impact on in-hospital mortality rate, which was 14.2% in patients on warfarin or a newer anticoagulant and 14.3% in those who were not. Dr. Pimentel presented the results of the investigators’ initial look at the data. They are in the process of obtaining the patients’ international normalized ratio data, which “should be enlightening,” she said.

She and her coinvestigators also plan to subdivide their 30-day study period into five-day segments to learn how soon after an atrial fibrillation episode the strokes occurred. Researchers at Stanford University have reported that the greatest stroke risk in patients with atrial fibrillation occurs during the first five days after an atrial fibrillation episode. Dr. Pimentel’s group would like to confirm that observation.

In addition, because it remains an unresolved question whether any amount of atrial fibrillation is safe, Dr. Pimentel and her coworkers are considering reanalyzing their data using a cutoff of six minutes of atrial fibrillation rather than one hour during the 30 days prior to stroke.

—Bruce Jancin

CHICAGO—One-third of a large cohort of patients with an implantable cardiac device in place at the time of an ischemic stroke had one or more episodes of atrial fibrillation within the previous 30 days, Rhea C. Pimentel, MD, said at the 65th Annual Meeting of the American College of Cardiology.

The in-hospital mortality rate of these atrial fibrillation–related strokes was high: 11 of 42 (26%) patients with this event died during their stroke hospitalization, compared with six of 83 (7%) patients whose strokes were not temporally related to atrial fibrillation, said Dr. Pimentel, an electrophysiologist at the University of Kansas Medical Center in Kansas City.

Data from the Framingham Heart Study and other sources suggest that stroke in patients with atrial fibrillation entails about double the mortality rate of strokes in patients without atrial fibrillation. Mortality associated with atrial fibrillation–related stroke in the study was probably much higher because the hospital serves as a comprehensive stroke center and admits patients from across the Midwest, she said.

Dr. Pimentel reported data on 125 patients who presented with an ischemic stroke when a cardiac monitoring device was in place. This study is described as the largest patient series ever reported. Patients’ mean age was 73, and 41% were women. The mean CHADS2 score was 3.96 and the mean CHA2DS2-VASc score was 5.28. Of the patients, 62% had a pacemaker; the rest had an implantable cardioverter-defibrillator or cardiac resynchronization device. One-quarter of the group had a prior history of atrial fibrillation, and a fifth were on an oral anticoagulant—warfarin, in 70% of cases—at the time of their stroke.

Investigators defined a stroke-related atrial fibrillation episode as a total of at least one hour spent in atrial fibrillation at 30 days preceding the stroke. Eighty percent of affected patients had paroxysmal atrial fibrillation. They typically fulfilled the one-hour atrial fibrillation requirement with multiple short, self-terminated episodes rather than with an hour-long episode.

Being on an oral anticoagulant had no impact on in-hospital mortality rate, which was 14.2% in patients on warfarin or a newer anticoagulant and 14.3% in those who were not. Dr. Pimentel presented the results of the investigators’ initial look at the data. They are in the process of obtaining the patients’ international normalized ratio data, which “should be enlightening,” she said.

She and her coinvestigators also plan to subdivide their 30-day study period into five-day segments to learn how soon after an atrial fibrillation episode the strokes occurred. Researchers at Stanford University have reported that the greatest stroke risk in patients with atrial fibrillation occurs during the first five days after an atrial fibrillation episode. Dr. Pimentel’s group would like to confirm that observation.

In addition, because it remains an unresolved question whether any amount of atrial fibrillation is safe, Dr. Pimentel and her coworkers are considering reanalyzing their data using a cutoff of six minutes of atrial fibrillation rather than one hour during the 30 days prior to stroke.

—Bruce Jancin

A biopsy of the submandibular gland may provide an accurate diagnosis of Parkinson’s disease and dementia with Lewy bodies (DLB), according to a study published March 30 in the Journal of Parkinson’s Disease. If confirmed, the results could improve patient recruitment for clinical trials.

Parkinson’s disease and DLB are widely misdiagnosed. Misdiagnosis may occur in approximately 50% of patients with Parkinson’s disease who are within the first five years of symptom onset, according to the researchers. Between 15% and 25% of neuropathologically defined patients with DLB receive a diagnosis of DLB during life.

“The low diagnostic accuracy, during life, for DLB has made it difficult to conduct effective clinical trials of possibly helpful new drugs,” said Thomas G. Beach, MD, PhD, Head and Senior Scientist at the Civin Laboratory for Neuropathology and Director of the Brain and Body Donation Program at Banner Sun Health Research Institute in Phoenix. “With better diagnostic accuracy, clinical trials would have a higher chance of success and could be done more quickly and at a lesser cost,” Dr. Beach said.

Brain biopsies are highly accurate for detecting Parkinson’s disease and DLB, but they entail a high risk of complications. Previous data suggested a high prevalence of submandibular gland synucleinopathy in patients with Parkinson’s disease. “This new work shows, in autopsies, that the submandibular gland also has the same signature alpha-synuclein pathology in a high proportion of subjects diagnosed during life with DLB,” said Dr. Beach.

Thomas G. Beach, MD, PhD

Dr. Beach and colleagues performed brain necropsies and neuropathologic examinations on elderly subjects with and without CNS Lewy-type pathology who had donated their bodies. The investigators stained submandibular gland sections with an immunohistochemical method to find Lewy-type α-synucleinopathy (LTS). Subjects with Lewy body disorders included 47 with Parkinson’s disease, 28 with DLB, nine with incidental Lewy-body disease, 33 with Alzheimer’s disease with Lewy bodies, and two with progressive supranuclear palsy with Lewy bodies. The 79 control subjects without CNS LTS included 15 with Alzheimer’s disease, 12 with progressive supranuclear palsy, two with corticobasal degeneration, and two with multiple system atrophy.

Submandibular gland LTS was present in 42 of 47 (89%) individuals with Parkinson’s disease, 20 of 28 (71%) people with DLB, four of 33 people with Alzheimer’s disease with Lewy bodies, one of nine people with incidental Lewy-body disease, and none of the 110 controls.

Needle biopsy of the submandibular gland may be useful as diagnostic biomarker or a biomarker of progression in Parkinson’s disease, said the researchers. In addition, the technique may improve diagnostic sensitivity for DLB and be a potential prognostic indicator. “The next step will be to do biopsies of the submandibular gland in living people with DLB to confirm these autopsy results,” Dr. Beach said.

—Erica Robinson

A biopsy of the submandibular gland may provide an accurate diagnosis of Parkinson’s disease and dementia with Lewy bodies (DLB), according to a study published March 30 in the Journal of Parkinson’s Disease. If confirmed, the results could improve patient recruitment for clinical trials.

Parkinson’s disease and DLB are widely misdiagnosed. Misdiagnosis may occur in approximately 50% of patients with Parkinson’s disease who are within the first five years of symptom onset, according to the researchers. Between 15% and 25% of neuropathologically defined patients with DLB receive a diagnosis of DLB during life.

“The low diagnostic accuracy, during life, for DLB has made it difficult to conduct effective clinical trials of possibly helpful new drugs,” said Thomas G. Beach, MD, PhD, Head and Senior Scientist at the Civin Laboratory for Neuropathology and Director of the Brain and Body Donation Program at Banner Sun Health Research Institute in Phoenix. “With better diagnostic accuracy, clinical trials would have a higher chance of success and could be done more quickly and at a lesser cost,” Dr. Beach said.

Brain biopsies are highly accurate for detecting Parkinson’s disease and DLB, but they entail a high risk of complications. Previous data suggested a high prevalence of submandibular gland synucleinopathy in patients with Parkinson’s disease. “This new work shows, in autopsies, that the submandibular gland also has the same signature alpha-synuclein pathology in a high proportion of subjects diagnosed during life with DLB,” said Dr. Beach.

Thomas G. Beach, MD, PhD

Dr. Beach and colleagues performed brain necropsies and neuropathologic examinations on elderly subjects with and without CNS Lewy-type pathology who had donated their bodies. The investigators stained submandibular gland sections with an immunohistochemical method to find Lewy-type α-synucleinopathy (LTS). Subjects with Lewy body disorders included 47 with Parkinson’s disease, 28 with DLB, nine with incidental Lewy-body disease, 33 with Alzheimer’s disease with Lewy bodies, and two with progressive supranuclear palsy with Lewy bodies. The 79 control subjects without CNS LTS included 15 with Alzheimer’s disease, 12 with progressive supranuclear palsy, two with corticobasal degeneration, and two with multiple system atrophy.

Submandibular gland LTS was present in 42 of 47 (89%) individuals with Parkinson’s disease, 20 of 28 (71%) people with DLB, four of 33 people with Alzheimer’s disease with Lewy bodies, one of nine people with incidental Lewy-body disease, and none of the 110 controls.

Needle biopsy of the submandibular gland may be useful as diagnostic biomarker or a biomarker of progression in Parkinson’s disease, said the researchers. In addition, the technique may improve diagnostic sensitivity for DLB and be a potential prognostic indicator. “The next step will be to do biopsies of the submandibular gland in living people with DLB to confirm these autopsy results,” Dr. Beach said.

—Erica Robinson

A biopsy of the submandibular gland may provide an accurate diagnosis of Parkinson’s disease and dementia with Lewy bodies (DLB), according to a study published March 30 in the Journal of Parkinson’s Disease. If confirmed, the results could improve patient recruitment for clinical trials.

Parkinson’s disease and DLB are widely misdiagnosed. Misdiagnosis may occur in approximately 50% of patients with Parkinson’s disease who are within the first five years of symptom onset, according to the researchers. Between 15% and 25% of neuropathologically defined patients with DLB receive a diagnosis of DLB during life.

“The low diagnostic accuracy, during life, for DLB has made it difficult to conduct effective clinical trials of possibly helpful new drugs,” said Thomas G. Beach, MD, PhD, Head and Senior Scientist at the Civin Laboratory for Neuropathology and Director of the Brain and Body Donation Program at Banner Sun Health Research Institute in Phoenix. “With better diagnostic accuracy, clinical trials would have a higher chance of success and could be done more quickly and at a lesser cost,” Dr. Beach said.

Brain biopsies are highly accurate for detecting Parkinson’s disease and DLB, but they entail a high risk of complications. Previous data suggested a high prevalence of submandibular gland synucleinopathy in patients with Parkinson’s disease. “This new work shows, in autopsies, that the submandibular gland also has the same signature alpha-synuclein pathology in a high proportion of subjects diagnosed during life with DLB,” said Dr. Beach.

Thomas G. Beach, MD, PhD

Dr. Beach and colleagues performed brain necropsies and neuropathologic examinations on elderly subjects with and without CNS Lewy-type pathology who had donated their bodies. The investigators stained submandibular gland sections with an immunohistochemical method to find Lewy-type α-synucleinopathy (LTS). Subjects with Lewy body disorders included 47 with Parkinson’s disease, 28 with DLB, nine with incidental Lewy-body disease, 33 with Alzheimer’s disease with Lewy bodies, and two with progressive supranuclear palsy with Lewy bodies. The 79 control subjects without CNS LTS included 15 with Alzheimer’s disease, 12 with progressive supranuclear palsy, two with corticobasal degeneration, and two with multiple system atrophy.

Submandibular gland LTS was present in 42 of 47 (89%) individuals with Parkinson’s disease, 20 of 28 (71%) people with DLB, four of 33 people with Alzheimer’s disease with Lewy bodies, one of nine people with incidental Lewy-body disease, and none of the 110 controls.

Needle biopsy of the submandibular gland may be useful as diagnostic biomarker or a biomarker of progression in Parkinson’s disease, said the researchers. In addition, the technique may improve diagnostic sensitivity for DLB and be a potential prognostic indicator. “The next step will be to do biopsies of the submandibular gland in living people with DLB to confirm these autopsy results,” Dr. Beach said.

—Erica Robinson

Trajectories of blood pressure in mid to late life are associated with incident stroke and mortality, according to research published online ahead of print May 9 in Hypertension.

Most associations between blood pressure—a major modifiable risk factor for stroke—and incident stroke have been based on blood pressure measurements taken at a single time point.

Although long-term trajectories of blood pressure can vary considerably in the elderly, studies have not looked at the long-term blood pressure trajectories in mid to late life or at whether such trajectories relate to stroke, said M. Arfan Ikram, MD, PhD, senior study author and Associate Professor of Neuroepidemiology at Erasmus University Medical Center in Rotterdam, the Netherlands.

M. Arfan Ikram, MD, PhD

To identify long-term trajectories of blood pressure in a population-based study and examine the risk of stroke within those trajectories, Dr. Ikram and colleagues evaluated the course of systolic blood pressure in 6,745 participants within the Rotterdam Study.

Participants resided in Ommoord, a suburb of Rotterdam, and received baseline examinations starting in 1990. The investigators used data from five follow-up visits, which occurred every three to four years from 1990 to 2011. During each follow-up visit, blood pressure was measured twice in the right arm, in sitting position, after a resting period of five minutes. Researchers used the average of the two measurements. The investigators focused on systolic blood pressure because it is the best predictor of cardiovascular events.

Participants’ ages ranged from 55 to 106, and 60% were women. Participants had a mean follow-up of 13.5 years.

Four Trajectories

The investigators jointly modeled participants’ risk of stroke and competing causes of death using joint latent class mixed modeling. When assessing blood pressure trajectories, the researchers found that the joint latent class model with four trajectory classes had the best fit.

Class 1, the largest class, included 4,938 participants. It was characterized by a gradually increasing blood pressure, starting at an average of 120 mm Hg at age 55 and increasing to an average of 160 mm Hg at age 95. Class 2, with 822 participants, was characterized by a similar blood pressure at age 55, but a much steeper increase in blood pressure, to an average of 200 mm Hg. The two other classes were characterized by a relatively higher baseline blood pressure. In class 3 (870 participants), the average baseline blood pressure of 140 mm Hg had modest variation over time. In class 4 (115 patients), the average baseline blood pressure of 160 mm Hg decreased after age 65.

People in class 4 were more frequently men. Use of blood pressure-lowering medication was similar between classes at baseline. At the end of follow-up, classes 3 and 4 had higher proportions of blood pressure-lowering medication users. Frequency of current smokers varied between classes, with particularly higher frequencies in classes 2 and 4.

Groups’ Risk Varied

During the study period, 1,053 participants had a stroke. Researchers also studied the number of deaths that occurred from nonstroke health events. They adjusted for sex and baseline blood-pressure lowering medication.

Classes 2, 3, and 4 had a significantly and substantially higher risk of stroke, compared with class 1 (ie, 4.7% to 13.6% vs 0.7%). Classes 2 and 4 had the highest risk of dying of other causes. The risk of dying of other causes in class 3 was similar to that of class 1. The risk of stroke in class 3, however, continued to increase until older age and was highest overall.

In all, 2,546 people (51.5%) in class 1, 575 (70.0%) people in class 2, 288 (33.1%) people in class 3, and 87 (75.7%) people in class 4 died due to a nonstroke-related cause. Between 25% and 38% of nonstroke deaths were due to cardiovascular events.

In multivariable-adjusted models that controlled for cholesterol, lipid-lowering medication, BMI, smoking, alcohol use, diabetes mellitus type 2, and antithrombotic medication, the results were relatively similar, the researchers said. The risk of stroke in classes 2 and 4 was attenuated by data adjustment, whereas the risk increased in class 3.

“Assessing trajectories of blood pressure provides a more nuanced understanding of the associations between blood pressure, stroke, and mortality,” the authors said.

The researchers noted that people in class 2 with steep increases in blood pressure might not receive effective treatment in time under current guidelines, and future studies could determine whether this class can be a target for prevention.

Effect of Slope

Prior studies that examined blood pressure trajectories in young to middle-aged people identified several parallel trajectories and found that long-term higher blood pressure related to more cardiovascular pathology.

“In our older population, we also observed that the class with a high mid-life blood pressure had the highest risk of stroke and death, compared to the class with the lowest blood pressure,” Dr. Ikram and colleagues said. “However, a novel finding of our study is that the slope of increase was associated with an increasing risk of stroke and competing causes of death. Namely, we identified two classes characterized by equally low baseline blood pressure and increasing trajectories, but only the class characterized by steep increases had a high risk of stroke and death. Of note, the risks in that class were even similar to the class with a high mid-life blood pressure.”

The large study population, the use of repeated measures of blood pressure over a long follow-up, and thorough collection of stroke assessments were among the study’s strengths. The study was not large enough to examine stroke subtypes, the authors said. In addition, the study’s population was geographically limited and mostly white, although the findings likely apply to people from other communities, Dr. Ikram said.

“Blood pressure should be measured regularly because it can change markedly over the course of a couple years and put you at high risk for an adverse event,” said Dr. Ikram. “Since the risks of stroke and death differ across these trajectory paths, they are potentially important for preventive strategies.”

—Jake Remaly

Trajectories of blood pressure in mid to late life are associated with incident stroke and mortality, according to research published online ahead of print May 9 in Hypertension.

Most associations between blood pressure—a major modifiable risk factor for stroke—and incident stroke have been based on blood pressure measurements taken at a single time point.

Although long-term trajectories of blood pressure can vary considerably in the elderly, studies have not looked at the long-term blood pressure trajectories in mid to late life or at whether such trajectories relate to stroke, said M. Arfan Ikram, MD, PhD, senior study author and Associate Professor of Neuroepidemiology at Erasmus University Medical Center in Rotterdam, the Netherlands.

M. Arfan Ikram, MD, PhD

To identify long-term trajectories of blood pressure in a population-based study and examine the risk of stroke within those trajectories, Dr. Ikram and colleagues evaluated the course of systolic blood pressure in 6,745 participants within the Rotterdam Study.

Participants resided in Ommoord, a suburb of Rotterdam, and received baseline examinations starting in 1990. The investigators used data from five follow-up visits, which occurred every three to four years from 1990 to 2011. During each follow-up visit, blood pressure was measured twice in the right arm, in sitting position, after a resting period of five minutes. Researchers used the average of the two measurements. The investigators focused on systolic blood pressure because it is the best predictor of cardiovascular events.

Participants’ ages ranged from 55 to 106, and 60% were women. Participants had a mean follow-up of 13.5 years.

Four Trajectories

The investigators jointly modeled participants’ risk of stroke and competing causes of death using joint latent class mixed modeling. When assessing blood pressure trajectories, the researchers found that the joint latent class model with four trajectory classes had the best fit.

Class 1, the largest class, included 4,938 participants. It was characterized by a gradually increasing blood pressure, starting at an average of 120 mm Hg at age 55 and increasing to an average of 160 mm Hg at age 95. Class 2, with 822 participants, was characterized by a similar blood pressure at age 55, but a much steeper increase in blood pressure, to an average of 200 mm Hg. The two other classes were characterized by a relatively higher baseline blood pressure. In class 3 (870 participants), the average baseline blood pressure of 140 mm Hg had modest variation over time. In class 4 (115 patients), the average baseline blood pressure of 160 mm Hg decreased after age 65.

People in class 4 were more frequently men. Use of blood pressure-lowering medication was similar between classes at baseline. At the end of follow-up, classes 3 and 4 had higher proportions of blood pressure-lowering medication users. Frequency of current smokers varied between classes, with particularly higher frequencies in classes 2 and 4.

Groups’ Risk Varied

During the study period, 1,053 participants had a stroke. Researchers also studied the number of deaths that occurred from nonstroke health events. They adjusted for sex and baseline blood-pressure lowering medication.

Classes 2, 3, and 4 had a significantly and substantially higher risk of stroke, compared with class 1 (ie, 4.7% to 13.6% vs 0.7%). Classes 2 and 4 had the highest risk of dying of other causes. The risk of dying of other causes in class 3 was similar to that of class 1. The risk of stroke in class 3, however, continued to increase until older age and was highest overall.

In all, 2,546 people (51.5%) in class 1, 575 (70.0%) people in class 2, 288 (33.1%) people in class 3, and 87 (75.7%) people in class 4 died due to a nonstroke-related cause. Between 25% and 38% of nonstroke deaths were due to cardiovascular events.

In multivariable-adjusted models that controlled for cholesterol, lipid-lowering medication, BMI, smoking, alcohol use, diabetes mellitus type 2, and antithrombotic medication, the results were relatively similar, the researchers said. The risk of stroke in classes 2 and 4 was attenuated by data adjustment, whereas the risk increased in class 3.

“Assessing trajectories of blood pressure provides a more nuanced understanding of the associations between blood pressure, stroke, and mortality,” the authors said.

The researchers noted that people in class 2 with steep increases in blood pressure might not receive effective treatment in time under current guidelines, and future studies could determine whether this class can be a target for prevention.

Effect of Slope

Prior studies that examined blood pressure trajectories in young to middle-aged people identified several parallel trajectories and found that long-term higher blood pressure related to more cardiovascular pathology.

“In our older population, we also observed that the class with a high mid-life blood pressure had the highest risk of stroke and death, compared to the class with the lowest blood pressure,” Dr. Ikram and colleagues said. “However, a novel finding of our study is that the slope of increase was associated with an increasing risk of stroke and competing causes of death. Namely, we identified two classes characterized by equally low baseline blood pressure and increasing trajectories, but only the class characterized by steep increases had a high risk of stroke and death. Of note, the risks in that class were even similar to the class with a high mid-life blood pressure.”

The large study population, the use of repeated measures of blood pressure over a long follow-up, and thorough collection of stroke assessments were among the study’s strengths. The study was not large enough to examine stroke subtypes, the authors said. In addition, the study’s population was geographically limited and mostly white, although the findings likely apply to people from other communities, Dr. Ikram said.

“Blood pressure should be measured regularly because it can change markedly over the course of a couple years and put you at high risk for an adverse event,” said Dr. Ikram. “Since the risks of stroke and death differ across these trajectory paths, they are potentially important for preventive strategies.”

—Jake Remaly

Trajectories of blood pressure in mid to late life are associated with incident stroke and mortality, according to research published online ahead of print May 9 in Hypertension.

Most associations between blood pressure—a major modifiable risk factor for stroke—and incident stroke have been based on blood pressure measurements taken at a single time point.

Although long-term trajectories of blood pressure can vary considerably in the elderly, studies have not looked at the long-term blood pressure trajectories in mid to late life or at whether such trajectories relate to stroke, said M. Arfan Ikram, MD, PhD, senior study author and Associate Professor of Neuroepidemiology at Erasmus University Medical Center in Rotterdam, the Netherlands.

M. Arfan Ikram, MD, PhD

To identify long-term trajectories of blood pressure in a population-based study and examine the risk of stroke within those trajectories, Dr. Ikram and colleagues evaluated the course of systolic blood pressure in 6,745 participants within the Rotterdam Study.

Participants resided in Ommoord, a suburb of Rotterdam, and received baseline examinations starting in 1990. The investigators used data from five follow-up visits, which occurred every three to four years from 1990 to 2011. During each follow-up visit, blood pressure was measured twice in the right arm, in sitting position, after a resting period of five minutes. Researchers used the average of the two measurements. The investigators focused on systolic blood pressure because it is the best predictor of cardiovascular events.

Participants’ ages ranged from 55 to 106, and 60% were women. Participants had a mean follow-up of 13.5 years.

Four Trajectories

The investigators jointly modeled participants’ risk of stroke and competing causes of death using joint latent class mixed modeling. When assessing blood pressure trajectories, the researchers found that the joint latent class model with four trajectory classes had the best fit.

Class 1, the largest class, included 4,938 participants. It was characterized by a gradually increasing blood pressure, starting at an average of 120 mm Hg at age 55 and increasing to an average of 160 mm Hg at age 95. Class 2, with 822 participants, was characterized by a similar blood pressure at age 55, but a much steeper increase in blood pressure, to an average of 200 mm Hg. The two other classes were characterized by a relatively higher baseline blood pressure. In class 3 (870 participants), the average baseline blood pressure of 140 mm Hg had modest variation over time. In class 4 (115 patients), the average baseline blood pressure of 160 mm Hg decreased after age 65.

People in class 4 were more frequently men. Use of blood pressure-lowering medication was similar between classes at baseline. At the end of follow-up, classes 3 and 4 had higher proportions of blood pressure-lowering medication users. Frequency of current smokers varied between classes, with particularly higher frequencies in classes 2 and 4.

Groups’ Risk Varied

During the study period, 1,053 participants had a stroke. Researchers also studied the number of deaths that occurred from nonstroke health events. They adjusted for sex and baseline blood-pressure lowering medication.

Classes 2, 3, and 4 had a significantly and substantially higher risk of stroke, compared with class 1 (ie, 4.7% to 13.6% vs 0.7%). Classes 2 and 4 had the highest risk of dying of other causes. The risk of dying of other causes in class 3 was similar to that of class 1. The risk of stroke in class 3, however, continued to increase until older age and was highest overall.

In all, 2,546 people (51.5%) in class 1, 575 (70.0%) people in class 2, 288 (33.1%) people in class 3, and 87 (75.7%) people in class 4 died due to a nonstroke-related cause. Between 25% and 38% of nonstroke deaths were due to cardiovascular events.

In multivariable-adjusted models that controlled for cholesterol, lipid-lowering medication, BMI, smoking, alcohol use, diabetes mellitus type 2, and antithrombotic medication, the results were relatively similar, the researchers said. The risk of stroke in classes 2 and 4 was attenuated by data adjustment, whereas the risk increased in class 3.

“Assessing trajectories of blood pressure provides a more nuanced understanding of the associations between blood pressure, stroke, and mortality,” the authors said.

The researchers noted that people in class 2 with steep increases in blood pressure might not receive effective treatment in time under current guidelines, and future studies could determine whether this class can be a target for prevention.

Effect of Slope

Prior studies that examined blood pressure trajectories in young to middle-aged people identified several parallel trajectories and found that long-term higher blood pressure related to more cardiovascular pathology.

“In our older population, we also observed that the class with a high mid-life blood pressure had the highest risk of stroke and death, compared to the class with the lowest blood pressure,” Dr. Ikram and colleagues said. “However, a novel finding of our study is that the slope of increase was associated with an increasing risk of stroke and competing causes of death. Namely, we identified two classes characterized by equally low baseline blood pressure and increasing trajectories, but only the class characterized by steep increases had a high risk of stroke and death. Of note, the risks in that class were even similar to the class with a high mid-life blood pressure.”

The large study population, the use of repeated measures of blood pressure over a long follow-up, and thorough collection of stroke assessments were among the study’s strengths. The study was not large enough to examine stroke subtypes, the authors said. In addition, the study’s population was geographically limited and mostly white, although the findings likely apply to people from other communities, Dr. Ikram said.

“Blood pressure should be measured regularly because it can change markedly over the course of a couple years and put you at high risk for an adverse event,” said Dr. Ikram. “Since the risks of stroke and death differ across these trajectory paths, they are potentially important for preventive strategies.”

—Jake Remaly

Clinical question: What are the current recommendations for antithrombotic therapy in various venous thromboembolism (VTE) scenarios?

Background: VTE is commonly encountered with a multitude of therapeutic options. Selecting the optimal anticoagulant is as important as making the diagnosis and requires knowledge of individual patient characteristics to initiate the correct therapy. These factors include malignancy, location of thrombus, and history of recurrent VTE despite anticoagulation.

Study design: Guideline.

Setting: Expert panel.

Synopsis: For VTE patients without cancer, non-vitamin K oral anticoagulants (NOAC) are now suggested over vitamin K antagonists (Grade 2B). However, there remains no strong evidence to favor one NOAC over another.

Better evidence now supports the prior recommendation to discourage IVC filters for VTE that is being treated with anticoagulation (Grade 1B).

In pulmonary embolism of the subsegmental type without proximal DVT, clinical surveillance is favored over anticoagulation in lower-risk patients (Grade 2C).

Low-molecular-weight heparin (LMWH) is advised in recurrent VTE treated with non-LMWH, and for recurrences on LMWH, a dose increase of LMWH is advised (Grade 2C).

Finally, routine use of compression stockings for post-thrombotic syndrome prevention is not routinely recommended (Grade 2B).

Limitations include only 20 of the 54 total recommendations being of strong Grade 1 criteria. Additionally, none of the 54 statements are drawn from high-quality evidence.

Further study is needed to continually update our practice in caring for VTE disease as more experience and comparison data are obtained with the use of NOAC drugs.

Bottom line: Anticoagulant therapy recommendations have been updated, but few are strong recommendations and none are based on high-quality evidence.

Citation: Kearon C, Akl EA, Ornelas J, et al. Antithrombotic therapy for VTE disease: CHEST guideline and expert panel report. Chest. 2016;149(2):315-352.

Clinical question: What are the current recommendations for antithrombotic therapy in various venous thromboembolism (VTE) scenarios?

Background: VTE is commonly encountered with a multitude of therapeutic options. Selecting the optimal anticoagulant is as important as making the diagnosis and requires knowledge of individual patient characteristics to initiate the correct therapy. These factors include malignancy, location of thrombus, and history of recurrent VTE despite anticoagulation.

Study design: Guideline.

Setting: Expert panel.

Synopsis: For VTE patients without cancer, non-vitamin K oral anticoagulants (NOAC) are now suggested over vitamin K antagonists (Grade 2B). However, there remains no strong evidence to favor one NOAC over another.

Better evidence now supports the prior recommendation to discourage IVC filters for VTE that is being treated with anticoagulation (Grade 1B).

In pulmonary embolism of the subsegmental type without proximal DVT, clinical surveillance is favored over anticoagulation in lower-risk patients (Grade 2C).

Low-molecular-weight heparin (LMWH) is advised in recurrent VTE treated with non-LMWH, and for recurrences on LMWH, a dose increase of LMWH is advised (Grade 2C).

Finally, routine use of compression stockings for post-thrombotic syndrome prevention is not routinely recommended (Grade 2B).

Limitations include only 20 of the 54 total recommendations being of strong Grade 1 criteria. Additionally, none of the 54 statements are drawn from high-quality evidence.

Further study is needed to continually update our practice in caring for VTE disease as more experience and comparison data are obtained with the use of NOAC drugs.

Bottom line: Anticoagulant therapy recommendations have been updated, but few are strong recommendations and none are based on high-quality evidence.

Citation: Kearon C, Akl EA, Ornelas J, et al. Antithrombotic therapy for VTE disease: CHEST guideline and expert panel report. Chest. 2016;149(2):315-352.

Clinical question: What are the current recommendations for antithrombotic therapy in various venous thromboembolism (VTE) scenarios?

Background: VTE is commonly encountered with a multitude of therapeutic options. Selecting the optimal anticoagulant is as important as making the diagnosis and requires knowledge of individual patient characteristics to initiate the correct therapy. These factors include malignancy, location of thrombus, and history of recurrent VTE despite anticoagulation.

Study design: Guideline.

Setting: Expert panel.

Synopsis: For VTE patients without cancer, non-vitamin K oral anticoagulants (NOAC) are now suggested over vitamin K antagonists (Grade 2B). However, there remains no strong evidence to favor one NOAC over another.

Better evidence now supports the prior recommendation to discourage IVC filters for VTE that is being treated with anticoagulation (Grade 1B).

In pulmonary embolism of the subsegmental type without proximal DVT, clinical surveillance is favored over anticoagulation in lower-risk patients (Grade 2C).

Low-molecular-weight heparin (LMWH) is advised in recurrent VTE treated with non-LMWH, and for recurrences on LMWH, a dose increase of LMWH is advised (Grade 2C).

Finally, routine use of compression stockings for post-thrombotic syndrome prevention is not routinely recommended (Grade 2B).

Limitations include only 20 of the 54 total recommendations being of strong Grade 1 criteria. Additionally, none of the 54 statements are drawn from high-quality evidence.

Further study is needed to continually update our practice in caring for VTE disease as more experience and comparison data are obtained with the use of NOAC drugs.

Bottom line: Anticoagulant therapy recommendations have been updated, but few are strong recommendations and none are based on high-quality evidence.

Citation: Kearon C, Akl EA, Ornelas J, et al. Antithrombotic therapy for VTE disease: CHEST guideline and expert panel report. Chest. 2016;149(2):315-352.

Clinical question: Is tamsulosin efficacious as an expulsive therapy for distal ureter stones ≤10 mm in diameter?

Background: Ureteric calculi are a common reason for hospital admission, and use of medical expulsive therapy during observation periods for small caliber stones has gained much attention recently. Specifically, tamsulosin has been suggested as a medical therapy for small stones.

Study design: Randomized, double-blind, placebo-controlled study.

Setting: Five EDs in Australia.

Synopsis: A total of 403 patients participated in the study, based on inclusion criteria of age older than 18 years with symptoms and CT evidence of ureteric stones Exclusion criteria included fever, glomerular filtration rate <60, and calculi >10 mm. Patients were randomized to placebo or 0.4 mg tamsulosin daily for 28 days. The outcome was stone expulsion demonstrated by absence of calculi on repeat CT. Stone passage in the entire group occurred in 87% of the tamsulosin arm and 81.9% of the placebo, with a 95% CI of -3.0% to 13%, which was not a significant difference with P=0.22.

Interestingly, in a subgroup analysis of larger stones 5–10 mm, 83% of tamsulosin subjects compared to 61% of placebo subjects had stone passage that was significant at a 22% difference and P=.03.

Limitations included compliance in both groups, applicability to other populations given study based in Australia, and the lack of follow-through with CT scan at 28 days in 17% of the original group, resulting in missing outcome data.

Bottom line: Patients with ureteric stones 5–10 mm in size demonstrate increased spontaneous stone expulsion with the addition of tamsulosin and should thus be offered this therapy.

Citation: Furyk J, Chu K, Banks C, et al. Distal ureteric stones and tamsulosin: a double-blind, placebo-controlled, randomized, multicenter trial. Ann Emerg Med. 2016;67(1):86-95.e2.

Short Take

Low Diagnostic Yield of Blood Cultures in Hospitalized Medical Patients

Prospective cohort study of patients hospitalized on a medical service demonstrated a true positive rate of blood cultures that was lower than previously studied. Using objective clinical predictors may improve likelihood of true positive blood cultures.

Citation: Linsenmeyer K, Gupta K, Strymish JM, Dhanani M, Brecher SM, Breu AC. Culture if spikes? Indications and yield of blood cultures in hospitalized medical patients [published online ahead of print January 13, 2016]. J Hosp Med. doi:10.1002/jhm.2541.

Clinical question: Is tamsulosin efficacious as an expulsive therapy for distal ureter stones ≤10 mm in diameter?

Background: Ureteric calculi are a common reason for hospital admission, and use of medical expulsive therapy during observation periods for small caliber stones has gained much attention recently. Specifically, tamsulosin has been suggested as a medical therapy for small stones.

Study design: Randomized, double-blind, placebo-controlled study.

Setting: Five EDs in Australia.

Synopsis: A total of 403 patients participated in the study, based on inclusion criteria of age older than 18 years with symptoms and CT evidence of ureteric stones Exclusion criteria included fever, glomerular filtration rate <60, and calculi >10 mm. Patients were randomized to placebo or 0.4 mg tamsulosin daily for 28 days. The outcome was stone expulsion demonstrated by absence of calculi on repeat CT. Stone passage in the entire group occurred in 87% of the tamsulosin arm and 81.9% of the placebo, with a 95% CI of -3.0% to 13%, which was not a significant difference with P=0.22.

Interestingly, in a subgroup analysis of larger stones 5–10 mm, 83% of tamsulosin subjects compared to 61% of placebo subjects had stone passage that was significant at a 22% difference and P=.03.

Limitations included compliance in both groups, applicability to other populations given study based in Australia, and the lack of follow-through with CT scan at 28 days in 17% of the original group, resulting in missing outcome data.

Bottom line: Patients with ureteric stones 5–10 mm in size demonstrate increased spontaneous stone expulsion with the addition of tamsulosin and should thus be offered this therapy.

Citation: Furyk J, Chu K, Banks C, et al. Distal ureteric stones and tamsulosin: a double-blind, placebo-controlled, randomized, multicenter trial. Ann Emerg Med. 2016;67(1):86-95.e2.

Short Take

Low Diagnostic Yield of Blood Cultures in Hospitalized Medical Patients

Prospective cohort study of patients hospitalized on a medical service demonstrated a true positive rate of blood cultures that was lower than previously studied. Using objective clinical predictors may improve likelihood of true positive blood cultures.

Citation: Linsenmeyer K, Gupta K, Strymish JM, Dhanani M, Brecher SM, Breu AC. Culture if spikes? Indications and yield of blood cultures in hospitalized medical patients [published online ahead of print January 13, 2016]. J Hosp Med. doi:10.1002/jhm.2541.

Clinical question: Is tamsulosin efficacious as an expulsive therapy for distal ureter stones ≤10 mm in diameter?

Background: Ureteric calculi are a common reason for hospital admission, and use of medical expulsive therapy during observation periods for small caliber stones has gained much attention recently. Specifically, tamsulosin has been suggested as a medical therapy for small stones.

Study design: Randomized, double-blind, placebo-controlled study.

Setting: Five EDs in Australia.

Synopsis: A total of 403 patients participated in the study, based on inclusion criteria of age older than 18 years with symptoms and CT evidence of ureteric stones Exclusion criteria included fever, glomerular filtration rate <60, and calculi >10 mm. Patients were randomized to placebo or 0.4 mg tamsulosin daily for 28 days. The outcome was stone expulsion demonstrated by absence of calculi on repeat CT. Stone passage in the entire group occurred in 87% of the tamsulosin arm and 81.9% of the placebo, with a 95% CI of -3.0% to 13%, which was not a significant difference with P=0.22.

Interestingly, in a subgroup analysis of larger stones 5–10 mm, 83% of tamsulosin subjects compared to 61% of placebo subjects had stone passage that was significant at a 22% difference and P=.03.

Limitations included compliance in both groups, applicability to other populations given study based in Australia, and the lack of follow-through with CT scan at 28 days in 17% of the original group, resulting in missing outcome data.

Bottom line: Patients with ureteric stones 5–10 mm in size demonstrate increased spontaneous stone expulsion with the addition of tamsulosin and should thus be offered this therapy.

Citation: Furyk J, Chu K, Banks C, et al. Distal ureteric stones and tamsulosin: a double-blind, placebo-controlled, randomized, multicenter trial. Ann Emerg Med. 2016;67(1):86-95.e2.

Short Take

Low Diagnostic Yield of Blood Cultures in Hospitalized Medical Patients

Prospective cohort study of patients hospitalized on a medical service demonstrated a true positive rate of blood cultures that was lower than previously studied. Using objective clinical predictors may improve likelihood of true positive blood cultures.

Citation: Linsenmeyer K, Gupta K, Strymish JM, Dhanani M, Brecher SM, Breu AC. Culture if spikes? Indications and yield of blood cultures in hospitalized medical patients [published online ahead of print January 13, 2016]. J Hosp Med. doi:10.1002/jhm.2541.

Clinical question: Do claim-prone physicians account for a substantial share of all paid malpractice claims?

Background: Many studies have compared physicians who have multiple malpractice claims against them with colleagues who have few or no claims against them and have identified systemic differences in their age, sex, and specialty. However, only a few published studies have analyzed the nature of maldistribution itself.

Study design: Retrospective cohort study.

Setting: Using data from the National Practitioner Data Bank (NPDB).

Synopsis: The NPDB is a confidential data repository created by Congress in 1986. Information was obtained on all payments reported to the NPDB against physicians in the U.S. between January 1, 2005, and December 31, 2014. The study sample consisted of 66,426 paid claims against 54,099 physicians.

Physicians in four specialty groups accounted for more than half the claims: internal medicine (15%), obstetrics and gynecology (13%), general surgery (12%), and family medicine (11%). One percent of all physicians accounted for 32% of paid claims. Physicians’ risk of future paid claims increased monotonically with their number of previous paid claims. Physicians who had two paid claims had almost twice the risk of having another one (HR, 1.97; 95% CI, 1.86–2.07).

Risk also varied widely according to specialty. Compared with internal medicine physicians, neurosurgeons had approximately double the risk of recurrence (HR, 2.32; 95% CI, 1.77–3.03).

The study has some limitations. Some malpractice payments do not reach the NPDB. The study also focused on paid claims only.

Bottom line: A small group of U.S. physicians accounted for a disproportionately large share of paid malpractice claims. Several physician characteristics, most notably the number of previous claims and physician specialty, were significantly associated with recurrence of claims.

Citation: Studdert DM, Bismark MM, Mello MM, Singh H, Spittal MJ. Prevalence and characteristics of physicians prone to malpractice claims. N Engl J Med. 2016;374(4):354-362. doi:10.1056/nejmsa1506137.

Clinical question: Do claim-prone physicians account for a substantial share of all paid malpractice claims?

Background: Many studies have compared physicians who have multiple malpractice claims against them with colleagues who have few or no claims against them and have identified systemic differences in their age, sex, and specialty. However, only a few published studies have analyzed the nature of maldistribution itself.

Study design: Retrospective cohort study.

Setting: Using data from the National Practitioner Data Bank (NPDB).

Synopsis: The NPDB is a confidential data repository created by Congress in 1986. Information was obtained on all payments reported to the NPDB against physicians in the U.S. between January 1, 2005, and December 31, 2014. The study sample consisted of 66,426 paid claims against 54,099 physicians.

Physicians in four specialty groups accounted for more than half the claims: internal medicine (15%), obstetrics and gynecology (13%), general surgery (12%), and family medicine (11%). One percent of all physicians accounted for 32% of paid claims. Physicians’ risk of future paid claims increased monotonically with their number of previous paid claims. Physicians who had two paid claims had almost twice the risk of having another one (HR, 1.97; 95% CI, 1.86–2.07).

Risk also varied widely according to specialty. Compared with internal medicine physicians, neurosurgeons had approximately double the risk of recurrence (HR, 2.32; 95% CI, 1.77–3.03).

The study has some limitations. Some malpractice payments do not reach the NPDB. The study also focused on paid claims only.

Bottom line: A small group of U.S. physicians accounted for a disproportionately large share of paid malpractice claims. Several physician characteristics, most notably the number of previous claims and physician specialty, were significantly associated with recurrence of claims.

Citation: Studdert DM, Bismark MM, Mello MM, Singh H, Spittal MJ. Prevalence and characteristics of physicians prone to malpractice claims. N Engl J Med. 2016;374(4):354-362. doi:10.1056/nejmsa1506137.

Clinical question: Do claim-prone physicians account for a substantial share of all paid malpractice claims?

Background: Many studies have compared physicians who have multiple malpractice claims against them with colleagues who have few or no claims against them and have identified systemic differences in their age, sex, and specialty. However, only a few published studies have analyzed the nature of maldistribution itself.

Study design: Retrospective cohort study.

Setting: Using data from the National Practitioner Data Bank (NPDB).

Synopsis: The NPDB is a confidential data repository created by Congress in 1986. Information was obtained on all payments reported to the NPDB against physicians in the U.S. between January 1, 2005, and December 31, 2014. The study sample consisted of 66,426 paid claims against 54,099 physicians.

Physicians in four specialty groups accounted for more than half the claims: internal medicine (15%), obstetrics and gynecology (13%), general surgery (12%), and family medicine (11%). One percent of all physicians accounted for 32% of paid claims. Physicians’ risk of future paid claims increased monotonically with their number of previous paid claims. Physicians who had two paid claims had almost twice the risk of having another one (HR, 1.97; 95% CI, 1.86–2.07).

Risk also varied widely according to specialty. Compared with internal medicine physicians, neurosurgeons had approximately double the risk of recurrence (HR, 2.32; 95% CI, 1.77–3.03).

The study has some limitations. Some malpractice payments do not reach the NPDB. The study also focused on paid claims only.

Bottom line: A small group of U.S. physicians accounted for a disproportionately large share of paid malpractice claims. Several physician characteristics, most notably the number of previous claims and physician specialty, were significantly associated with recurrence of claims.

Citation: Studdert DM, Bismark MM, Mello MM, Singh H, Spittal MJ. Prevalence and characteristics of physicians prone to malpractice claims. N Engl J Med. 2016;374(4):354-362. doi:10.1056/nejmsa1506137.

Clinical question: What is the association of preoperative frailty on one-year postoperative mortality?

Background: Frailty is an aggregate expression of susceptibility to poor outcomes owing to age and disease-related deficits that accumulate with multiple domains. Frailty in this study was defined by the Johns Hopkins Adjusted Clinical Groups (ACG) frailty-defining diagnoses indicator. It is a binary variable that uses 12 clusters of frailty-defining diagnoses.

Study design: Population-based retrospective cohort study.

Setting: All hospital and physician services funded through the public health care system in Toronto.

Synopsis: The study had 202,980 patients who underwent major elective non-cardiac surgery. Frailty-defining diagnoses were present in 6,289 patients (3.1%). Mean age for the frail population was about 77 years. Joint replacements were the most common procedures for the frail and non-frail groups. Knee replacements were more prevalent in the non-frail group. One year after surgery, 855 frail patients (13.6%) and 9,433 non-frail patients (4.8%) died (unadjusted hazard ratio [HR], 2.98; 95% CI, 2.78–3.20). When adjusted for age, sex, neighborhood income quintile, and procedure, one-year mortality risk remained significantly higher in the frail group. One-year risk of death was significantly higher in frail patients for all surgical procedures, especially with total joint arthroplasty.

The relative hazard ratio of mortality in frail versus non-frail was extremely high in the early postoperative period, most notably at postoperative day three.

One major weakness of the study is that there is no universal definition of frailty, plus the results are difficult to generalize across populations.

Bottom line: Presence of preoperative frailty-defining diagnoses is associated with increased risk for one-year postoperative mortality; the risk appears to be very high in the early postoperative period.

Citation: McIsaac D, Bryson G, van Walraven C. Association of frailty and 1-year postoperative mortality following major elective noncardiac surgery: a population-based cohort study [published online ahead of print January 20, 2016]. JAMA Surg. doi:10.1001/jamasurg.2015.5085.

Short Take

Early Discharge Associated with Longer Length of Stay

Retrospective analysis showed early discharge before noon was associated with longer length of stay, especially among emergent admissions. However, multiple metrics should be used to measure true effectiveness of an early discharge program.

Citation: Rajkomar A, Valencia V, Novelero M, Mourad M, Auerbach A. The association between discharge before noon and length of stay in medical and surgical patients [published online ahead of print December 30, 2015]. J Hosp Med. doi:10.1002/jhm.2529.

Clinical question: What is the association of preoperative frailty on one-year postoperative mortality?

Background: Frailty is an aggregate expression of susceptibility to poor outcomes owing to age and disease-related deficits that accumulate with multiple domains. Frailty in this study was defined by the Johns Hopkins Adjusted Clinical Groups (ACG) frailty-defining diagnoses indicator. It is a binary variable that uses 12 clusters of frailty-defining diagnoses.

Study design: Population-based retrospective cohort study.

Setting: All hospital and physician services funded through the public health care system in Toronto.

Synopsis: The study had 202,980 patients who underwent major elective non-cardiac surgery. Frailty-defining diagnoses were present in 6,289 patients (3.1%). Mean age for the frail population was about 77 years. Joint replacements were the most common procedures for the frail and non-frail groups. Knee replacements were more prevalent in the non-frail group. One year after surgery, 855 frail patients (13.6%) and 9,433 non-frail patients (4.8%) died (unadjusted hazard ratio [HR], 2.98; 95% CI, 2.78–3.20). When adjusted for age, sex, neighborhood income quintile, and procedure, one-year mortality risk remained significantly higher in the frail group. One-year risk of death was significantly higher in frail patients for all surgical procedures, especially with total joint arthroplasty.

The relative hazard ratio of mortality in frail versus non-frail was extremely high in the early postoperative period, most notably at postoperative day three.

One major weakness of the study is that there is no universal definition of frailty, plus the results are difficult to generalize across populations.

Bottom line: Presence of preoperative frailty-defining diagnoses is associated with increased risk for one-year postoperative mortality; the risk appears to be very high in the early postoperative period.

Citation: McIsaac D, Bryson G, van Walraven C. Association of frailty and 1-year postoperative mortality following major elective noncardiac surgery: a population-based cohort study [published online ahead of print January 20, 2016]. JAMA Surg. doi:10.1001/jamasurg.2015.5085.

Short Take

Early Discharge Associated with Longer Length of Stay

Retrospective analysis showed early discharge before noon was associated with longer length of stay, especially among emergent admissions. However, multiple metrics should be used to measure true effectiveness of an early discharge program.

Citation: Rajkomar A, Valencia V, Novelero M, Mourad M, Auerbach A. The association between discharge before noon and length of stay in medical and surgical patients [published online ahead of print December 30, 2015]. J Hosp Med. doi:10.1002/jhm.2529.

Clinical question: What is the association of preoperative frailty on one-year postoperative mortality?

Background: Frailty is an aggregate expression of susceptibility to poor outcomes owing to age and disease-related deficits that accumulate with multiple domains. Frailty in this study was defined by the Johns Hopkins Adjusted Clinical Groups (ACG) frailty-defining diagnoses indicator. It is a binary variable that uses 12 clusters of frailty-defining diagnoses.

Study design: Population-based retrospective cohort study.

Setting: All hospital and physician services funded through the public health care system in Toronto.

Synopsis: The study had 202,980 patients who underwent major elective non-cardiac surgery. Frailty-defining diagnoses were present in 6,289 patients (3.1%). Mean age for the frail population was about 77 years. Joint replacements were the most common procedures for the frail and non-frail groups. Knee replacements were more prevalent in the non-frail group. One year after surgery, 855 frail patients (13.6%) and 9,433 non-frail patients (4.8%) died (unadjusted hazard ratio [HR], 2.98; 95% CI, 2.78–3.20). When adjusted for age, sex, neighborhood income quintile, and procedure, one-year mortality risk remained significantly higher in the frail group. One-year risk of death was significantly higher in frail patients for all surgical procedures, especially with total joint arthroplasty.

The relative hazard ratio of mortality in frail versus non-frail was extremely high in the early postoperative period, most notably at postoperative day three.

One major weakness of the study is that there is no universal definition of frailty, plus the results are difficult to generalize across populations.

Bottom line: Presence of preoperative frailty-defining diagnoses is associated with increased risk for one-year postoperative mortality; the risk appears to be very high in the early postoperative period.

Citation: McIsaac D, Bryson G, van Walraven C. Association of frailty and 1-year postoperative mortality following major elective noncardiac surgery: a population-based cohort study [published online ahead of print January 20, 2016]. JAMA Surg. doi:10.1001/jamasurg.2015.5085.

Short Take

Early Discharge Associated with Longer Length of Stay

Retrospective analysis showed early discharge before noon was associated with longer length of stay, especially among emergent admissions. However, multiple metrics should be used to measure true effectiveness of an early discharge program.

Citation: Rajkomar A, Valencia V, Novelero M, Mourad M, Auerbach A. The association between discharge before noon and length of stay in medical and surgical patients [published online ahead of print December 30, 2015]. J Hosp Med. doi:10.1002/jhm.2529.

Doctors can detect evidence of a concussion up to one week after a patient is injured by using a simple blood test, according to a report published online ahead of print March 28 in JAMA Neurology. Researchers tested two blood biomarkers—glial fibrillary acidic protein (GFAP) and ubiquitin C-terminal hydrolase L1 (UCH-L1)—separately and together in patients with mild and moderate traumatic brain injury (TBI) within seven days of the injury. They examined the blood biomarkers with respect to diagnostic precision of TBI, presence of traumatic intracranial lesions detectable by CT, and need for neurosurgical intervention. Linda Papa, MDCM, MSc, and colleagues reported that GFAP performed consistently in detecting mild to moderate TBI, CT lesions, and the need for neurosurgical interventions across seven days. UCH-L1, they said, performed best in the early postinjury period.

Linda Papa, MDCM, MSc

“We have so many diagnostic blood tests for different parts of the body, like the heart, liver and kidneys, but there’s never been a reliable blood test to identify trauma in the brain,” said Dr. Papa, an emergency medicine physician at Orlando Health in Florid and lead author of the study. “We think this particular test could change that.”

Dr. Papa and colleagues designed a prospective cohort study that enrolled adults with trauma seen at a level 1 trauma center from March 1, 2010, to March 5, 2014. All patients underwent screening to determine whether they had experienced mild or moderate TBI, which was defined as blunt head trauma with loss of consciousness, amnesia, or disorientation and a Glasgow Coma Scale score of 9 to 15. Of 3,025 patients assessed, 1,030 met eligibility criteria for enrollment; 446 declined participation. Initial blood samples were obtained in 584 patients enrolled within four hours of injury. Repeated blood sampling was conducted every four hours up to 24 hours postinjury, and then every 12 hours thereafter until 180 hours postinjury.

A total of 1,831 blood samples were drawn from 584 patients (mean age, 40; 62% male) over seven days. Both GFAP and UCH-L1 were detectible within one hour of injury. GFAP peaked at 20 hours postinjury and slowly declined over 72 hours. UCH-L1 rose rapidly and peaked at eight hours postinjury, then declined rapidly over 48 hours.

Over the course of one week, GFAP demonstrated a diagnostic range of areas under the curve for detecting mild to moderate TBI of 0.73 to 0.94, and UCH-L1 demonstrated a diagnostic range of 0.30 to 0.67. For detecting intracranial lesions on CT, the diagnostic ranges of areas under the curve were 0.80 to 0.97 for GFAP and 0.31 to 0.77 for UCH-L1. For distinguishing patients with and without the need for a neurosurgical intervention, the range for GFAP was 0.91 to 100 and the range for UCH-L1 was 0.50 to 0.92.

“In the context of developing a point-of-care test, the early and rapid rise of UCH-L1 could be used to detect TBI immediately at the scene of injury in settings such as in the ambulance, on the playing field, or at the battlefield,” the researchers wrote. “The longer half-life of GFAP makes it a favorable biomarker to use in both the acute and subacute phases of injury because it is able to detect CT lesions for up to seven days after injury. Although its rise is not as rapid as [that of] UCH-L1, it performs well for detecting mild TBI and CT lesions within one hour of injury.”

—Glenn S. Williams

Doctors can detect evidence of a concussion up to one week after a patient is injured by using a simple blood test, according to a report published online ahead of print March 28 in JAMA Neurology. Researchers tested two blood biomarkers—glial fibrillary acidic protein (GFAP) and ubiquitin C-terminal hydrolase L1 (UCH-L1)—separately and together in patients with mild and moderate traumatic brain injury (TBI) within seven days of the injury. They examined the blood biomarkers with respect to diagnostic precision of TBI, presence of traumatic intracranial lesions detectable by CT, and need for neurosurgical intervention. Linda Papa, MDCM, MSc, and colleagues reported that GFAP performed consistently in detecting mild to moderate TBI, CT lesions, and the need for neurosurgical interventions across seven days. UCH-L1, they said, performed best in the early postinjury period.

Linda Papa, MDCM, MSc

“We have so many diagnostic blood tests for different parts of the body, like the heart, liver and kidneys, but there’s never been a reliable blood test to identify trauma in the brain,” said Dr. Papa, an emergency medicine physician at Orlando Health in Florid and lead author of the study. “We think this particular test could change that.”

Dr. Papa and colleagues designed a prospective cohort study that enrolled adults with trauma seen at a level 1 trauma center from March 1, 2010, to March 5, 2014. All patients underwent screening to determine whether they had experienced mild or moderate TBI, which was defined as blunt head trauma with loss of consciousness, amnesia, or disorientation and a Glasgow Coma Scale score of 9 to 15. Of 3,025 patients assessed, 1,030 met eligibility criteria for enrollment; 446 declined participation. Initial blood samples were obtained in 584 patients enrolled within four hours of injury. Repeated blood sampling was conducted every four hours up to 24 hours postinjury, and then every 12 hours thereafter until 180 hours postinjury.

A total of 1,831 blood samples were drawn from 584 patients (mean age, 40; 62% male) over seven days. Both GFAP and UCH-L1 were detectible within one hour of injury. GFAP peaked at 20 hours postinjury and slowly declined over 72 hours. UCH-L1 rose rapidly and peaked at eight hours postinjury, then declined rapidly over 48 hours.

Over the course of one week, GFAP demonstrated a diagnostic range of areas under the curve for detecting mild to moderate TBI of 0.73 to 0.94, and UCH-L1 demonstrated a diagnostic range of 0.30 to 0.67. For detecting intracranial lesions on CT, the diagnostic ranges of areas under the curve were 0.80 to 0.97 for GFAP and 0.31 to 0.77 for UCH-L1. For distinguishing patients with and without the need for a neurosurgical intervention, the range for GFAP was 0.91 to 100 and the range for UCH-L1 was 0.50 to 0.92.

“In the context of developing a point-of-care test, the early and rapid rise of UCH-L1 could be used to detect TBI immediately at the scene of injury in settings such as in the ambulance, on the playing field, or at the battlefield,” the researchers wrote. “The longer half-life of GFAP makes it a favorable biomarker to use in both the acute and subacute phases of injury because it is able to detect CT lesions for up to seven days after injury. Although its rise is not as rapid as [that of] UCH-L1, it performs well for detecting mild TBI and CT lesions within one hour of injury.”

—Glenn S. Williams

Doctors can detect evidence of a concussion up to one week after a patient is injured by using a simple blood test, according to a report published online ahead of print March 28 in JAMA Neurology. Researchers tested two blood biomarkers—glial fibrillary acidic protein (GFAP) and ubiquitin C-terminal hydrolase L1 (UCH-L1)—separately and together in patients with mild and moderate traumatic brain injury (TBI) within seven days of the injury. They examined the blood biomarkers with respect to diagnostic precision of TBI, presence of traumatic intracranial lesions detectable by CT, and need for neurosurgical intervention. Linda Papa, MDCM, MSc, and colleagues reported that GFAP performed consistently in detecting mild to moderate TBI, CT lesions, and the need for neurosurgical interventions across seven days. UCH-L1, they said, performed best in the early postinjury period.

Linda Papa, MDCM, MSc

“We have so many diagnostic blood tests for different parts of the body, like the heart, liver and kidneys, but there’s never been a reliable blood test to identify trauma in the brain,” said Dr. Papa, an emergency medicine physician at Orlando Health in Florid and lead author of the study. “We think this particular test could change that.”

Dr. Papa and colleagues designed a prospective cohort study that enrolled adults with trauma seen at a level 1 trauma center from March 1, 2010, to March 5, 2014. All patients underwent screening to determine whether they had experienced mild or moderate TBI, which was defined as blunt head trauma with loss of consciousness, amnesia, or disorientation and a Glasgow Coma Scale score of 9 to 15. Of 3,025 patients assessed, 1,030 met eligibility criteria for enrollment; 446 declined participation. Initial blood samples were obtained in 584 patients enrolled within four hours of injury. Repeated blood sampling was conducted every four hours up to 24 hours postinjury, and then every 12 hours thereafter until 180 hours postinjury.

A total of 1,831 blood samples were drawn from 584 patients (mean age, 40; 62% male) over seven days. Both GFAP and UCH-L1 were detectible within one hour of injury. GFAP peaked at 20 hours postinjury and slowly declined over 72 hours. UCH-L1 rose rapidly and peaked at eight hours postinjury, then declined rapidly over 48 hours.

Over the course of one week, GFAP demonstrated a diagnostic range of areas under the curve for detecting mild to moderate TBI of 0.73 to 0.94, and UCH-L1 demonstrated a diagnostic range of 0.30 to 0.67. For detecting intracranial lesions on CT, the diagnostic ranges of areas under the curve were 0.80 to 0.97 for GFAP and 0.31 to 0.77 for UCH-L1. For distinguishing patients with and without the need for a neurosurgical intervention, the range for GFAP was 0.91 to 100 and the range for UCH-L1 was 0.50 to 0.92.

“In the context of developing a point-of-care test, the early and rapid rise of UCH-L1 could be used to detect TBI immediately at the scene of injury in settings such as in the ambulance, on the playing field, or at the battlefield,” the researchers wrote. “The longer half-life of GFAP makes it a favorable biomarker to use in both the acute and subacute phases of injury because it is able to detect CT lesions for up to seven days after injury. Although its rise is not as rapid as [that of] UCH-L1, it performs well for detecting mild TBI and CT lesions within one hour of injury.”

—Glenn S. Williams

A recent study suggests that brain MRI abnormalities are more common in patients with psychogenic nonepileptic events, when compared to the findings in normal persons. When investigators analyzed MRI data from 339 patients discharged from their epilepsy monitoring units, they found brain MRI abnormalities in 33.8% of patients with PNEEs and 57.7% in patients with epilepsy, much higher than would be found in a normal population.  The researchers also discovered that the brain MRI anomalies during epileptic seizures were more likely to occur in the temporal region of the brain, while PNEE anomalies were more frequently multifocal. 

Bolen RD, Koontz EH, Pritchard PB. Prevalence and distribution of MRI abnormalities in patients with psychogenic nonepileptic events. Epilepsy Behav. 2016;59:73-76. 

A recent study suggests that brain MRI abnormalities are more common in patients with psychogenic nonepileptic events, when compared to the findings in normal persons. When investigators analyzed MRI data from 339 patients discharged from their epilepsy monitoring units, they found brain MRI abnormalities in 33.8% of patients with PNEEs and 57.7% in patients with epilepsy, much higher than would be found in a normal population.  The researchers also discovered that the brain MRI anomalies during epileptic seizures were more likely to occur in the temporal region of the brain, while PNEE anomalies were more frequently multifocal. 

Bolen RD, Koontz EH, Pritchard PB. Prevalence and distribution of MRI abnormalities in patients with psychogenic nonepileptic events. Epilepsy Behav. 2016;59:73-76. 

A recent study suggests that brain MRI abnormalities are more common in patients with psychogenic nonepileptic events, when compared to the findings in normal persons. When investigators analyzed MRI data from 339 patients discharged from their epilepsy monitoring units, they found brain MRI abnormalities in 33.8% of patients with PNEEs and 57.7% in patients with epilepsy, much higher than would be found in a normal population.  The researchers also discovered that the brain MRI anomalies during epileptic seizures were more likely to occur in the temporal region of the brain, while PNEE anomalies were more frequently multifocal. 

Bolen RD, Koontz EH, Pritchard PB. Prevalence and distribution of MRI abnormalities in patients with psychogenic nonepileptic events. Epilepsy Behav. 2016;59:73-76.