MedicalResearch.com Interview with: Elliot B Tapper, M.D. Clinical Fellow in Medicine (EXT) Beth Israel Deaconess Medical Center Boston MA 02215 Medical Research: What is...
MedicalResearch.com Interview with:
Wiliam C. Huang, MD FACS
Associate Professor of Urology
Division of Urologic Oncology
NYU Langone Medical Center/Perlmutter Cancer Center
Medical Research: What is the background for this study? What are the main findings?
Dr. Huang: The presentation of kidney cancers has dramatically evolved over the past two decades with most kidney cancers being incidentally diagnosed at an early stage. We have begun to recognize that at this small size (< 4 cm), the tumors are frequently indolent in nature and some are completely benign. Consequently, the management options for these small cancers have expanded and evolved. Whereas the entire removal of the kidney was the treatment of choice in the past, alternative options including removal or ablation of the tumor-bearing portion of the kidney has become increasingly utilized. Similar to other early stage cancers, watchful waiting or observation is also becoming a reasonable treatment option.
We used the most recent SEER-Medicare Data (2001 – 2009) to evaluate the management trends and outcomes of small kidney cancers in the new millennium. We believe that this is an important study as it provides important and practical findings, which are useful to both clinical researches as well as practicing physicians.
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MedicalResearch.com Interview with:
Harley Goldberg, DO
Physical Medicine and Rehabilitation
Kaiser Permanente
Medical Research: What is the background for this study? What are the main findings?
Dr. Goldberg: This is the first large-scale randomized, double-blind, placebo-controlled clinical trial of oral steroids for acute radiculopathy, commonly called sciatica, associated with a herniated lumbar disk.
Lumbar radiculopathy (or pain down the leg in a lumbar nerve root distribution) is a common source of pain and disability for many adults. It is thought that inflammation from a disk herniation is responsible for many of the symptoms, so giving a powerful anti-inflammatory, such as steroid medication, might help relieve sciatica symptoms quickly. Prior research has shown that lumbar diskectomy does not affect the one year outcome for most patients, and epidural steroid injections do not have strong support by clinical trials. If the use of epidural steroids injections is based on application of steroid anti-inflammatory to the affected nerve root(s), perhaps an oral steroid can have affect. Although oral steroids are used by many physicians and have been included in some clinical guidelines, no large-scale clinical trials of oral steroids for sciatica have been conducted before.
Our study found that among patients with acute radiculopathy associated with a herniated lumbar disk, a short course of oral steroids resulted in only modest improvement in function and no significant improvement in pain.
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MedicalResearch.com Interview with:
Catherine M. Olsen, PhD
Population Health Department
QIMR Berghofer Medical Research Institute
Queensland, Australia
MedicalResearch: What is the background for this study?
Dr. Olsen: Effective skin cancer control requires two strategies: regular sun protection to prevent new cancers from occurring and early detection assisted by periodic skin examinations. The aim of our study was to describe the prevalence and predictive factors for sun protection and skin examination practices of adults in Queensland, Australia, a region that experiences the highest rates of skin cancer in the world. We were particularly interested in whether sun protection and skin examination practices differed between those with and without a previously confirmed melanoma and/or treatment for other skin lesions.
MedicalResearch: What are the main findings?
Dr. Olsen: The prevalence of both sun protection and skin examination practices was generally high in this large cohort of people who experience high levels of ambient sun exposure.
People who had been diagnosed with a melanoma or other skin lesion were more likely than those without to report sun protection practices including regular use of sunscreen and wearing hats.
The strongest predictor of sun protection practices was having a sun-sensitive skin type, and the strongest predictor of skin examination practices was having many moles and/or a family history of melanoma.
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MedicalResearch.com Interview with:
Efrat Amitay, PhD, MPH
School of Public Health
University of Haifa
Mount Carmel, Haifa, Israel
Medical Research: What is the background for this study?
Dr. Amitay: Although childhood cancer is still rare, we are seeing an increase of around 0.9% annually in the incidence rate in the western world. In spite of advancements in treatment technologies, childhood cancer is a leading cause of death among children and adolescents in the western world – accounting for about 12.3% of all deaths among children age 1-14 years in the US. Childhood cancer is also emerging as a major cause of death in other parts of the world where death rates from communicable diseases are declining. Leukemia is the most common type of childhood cancer and accounts for about 30% of all childhood and adolescent cancers.
Medical Research: What are the main findings?
Dr. Amitay: The meta-analysis of all 18 studies indicated that compared with no or shorter duration of breastfeeding, breastfeeding for 6 months or longer was associated with a 19% lower risk for childhood leukemia (OR=0.81, 95% CI, 0.73-0.89). A separate analysis of 15 of those studies indicated that ever being breastfed compared with never being breastfed was associated with an 11% lower risk for childhood leukemia (OR=0.89, 95% CI, 0.84-0.94). All meta-analyses of other sub groups of studies have shown similar associations, indicating that 14%-19% of all childhood leukemia cases may be prevented by breastfeeding for 6 months or more.
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MedicalResearch.com Interview with:
Paula Chatterjee, MD, MPH
Department of Medicine, Brigham and Women’s Hospital
Harvard Medical School
Boston, Massachusetts
Medical Research: What is the background for this study? What are the main findings?
Dr. Chatterjee: Thousands of patients die every year due to organ shortages. Finding ways to address this public health issue is critical. States have designed a variety of strategies to promote organ donation and transplantation, however we don’t know if any of these strategies have been successful. The goal of our study was to try to figure out which strategies have been most successful in terms of increasing organ donation and transplantation.
We found that states have implemented a wide and creative set of strategies, but unfortunately, it seems that these strategies have had almost no effect on increasing organ donation and transplantation. In states that adopted these strategies compared to those that did not, the rates of donation and transplantation increased at nearly the same rate over the past two decades. The only strategy that seemed to have a small effect was when states created revenue pools dedicated toward organ donation activities.
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MedicalResearch.com Interview with:
Andrew Bastawrous, MRCOphth
International Centre for Eye Health, Clinical Research Department
London School of Hygiene and Tropical Medicine (LSHTM), London, England
Medical Research: What is the background for this study? What are the main findings?
Dr. Bastawrous: As part of my PhD with the International Centre for Eye Health at the London School of Hygiene & Tropical Medicine, I led the follow-up of a major cohort study of eye disease [http://www.biomedcentral.com/1471-2415/14/60] following up 5,000 people in 100 different locations across the Great Rift Valley in Kenya. It was really challenging, two-thirds of the locations had no road access or electricity and we were carrying over £100,000 worth of fragile eye equipment and a team of 15 people in two vans to be able to carry out high quality measures of eye disease and answer some important questions for planning eye services.
What we found was that in the most difficult to reach locations we would find lots of people waiting to see us who had been unnecessarily blind from preventable/treatable diseases. Despite the locations having no roads, electricity and often no water, nearly all the locations had good phone signal.
Together with a brilliant team of developers, engineers and ophthalmologists we developed a suite of smartphone based tests to see if we could replace some of the standard equipment being used, in the hope that we could make it more portable and easier for non-specialists to perform so that ultimately the most high-risk individuals could be reached and treated.
This paper describes one of those tests, the visual acuity test - Peek Acuity.
Our field workers tested patients in their own homes using a standard card based Snellen chart (the type of vision test most non-ophthalmic healthcare workers are familiar with and has been the most commonly used acuity test for several decades now) and Peek Acuity. The same tests were repeated by the same healthcare worker in the clinic the following day as well as a reference standard vision test (LogMAR ETDRS) performed by an eye trained clinical officer.
This allowed us to perform "test re-test", a measure of a tests repeatability. i.e. if you have the same test at two separate time points we would expect the the measures to be very close. We found that for both Peek Acuity and Snellen they were highly repeatable. An advantage of Snellen is the speed of the test, Peek Acuity came out slightly quicker overall. We also found when compared to the reference standard test, Peek Acuity was highly comparable and within a clinically acceptable limit of difference.
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MedicalResearch.com Interview with:
Mark L. Friedell, MD, FACS
Chairman Department of Surgery
University of Missouri Kansas City
School of Medicine
Kansas City, MO 64108
Medical Research: What is the background for this study? What are the main findings?
Response: The controversial practice of administering pre-surgery beta-blockers to patients having noncardiac surgery was associated with an increased risk of death in patients with no cardiac risk factors but it was beneficial for patients with three to four risk factors, according to a report published online by JAMA Surgery.
Pre-surgery β-blockade is a widely accepted practice in patients having cardiac surgery. But its use in patients at low risk of heart-related events having noncardiac surgery is controversial because of the increased risk of stroke and hypotension (low blood pressure).
Because of the persistent controversy, researcher Mark L. Friedell, M.D., of the University of Missouri-Kansas City School of Medicine, and coauthors analyzed data from the Veterans Health Administration to examine the effect of perioperative β-blockade on patients having noncardiac surgery by measuring 30-day surgical mortality.
The analysis included 326,489 patients: 314,114 (96.2 percent) had noncardiac surgery and 12,375 (3.8 percent) had cardiac surgery. Overall, 141,185 patients (43.2 percent) received a β-blocker. Of the patients having cardiac surgery, 8,571 (69.3 percent) received a β-blocker and 132,614 (42.2 percent) of the patients having noncardiac surgery got one.
The unadjusted 30-day mortality rates among patients having noncardiac surgery for those not receiving β-blockers were 0.5 percent for patients with no cardiac risk factors, 1.4 percent for patients with one to two risk factors and 6.7 percent for patients with three to four risk factors. For those patients having noncardiac surgery who did receive β-blockers, the unadjusted 30-day mortality rates for patients with no cardiac risk factors, one to two risk factors and three to four risk factors were 1 percent, 1.7 percent and 3.5 percent, respectively, according to the results.
The results suggest that among patients with no cardiac risk factors having noncardiac surgery, those patients receiving β-blockers were 1.2 times more likely to die than those not receiving β-blockers. The risk of death decreased for those patients with one to two risk factors but the reduction was not significant. However, for patients having noncardiac surgery with three to four cardiac risk factors, those receiving β-blockers were significantly less likely to die than those not receiving β-blockers, the authors found. The authors did not observe similar results in patients having cardiac surgery.
“β-blockade is beneficial perioperatively for patients with three to four cardiac risk factors undergoing NCS [noncardiac surgery] but not in patients with one to two cardiac risk factors. Most important, the use of β-blockers in patients with no cardiac risk factors appears to be associated with a higher risk of death, which has, to our knowledge, not been previously reported,” the study concludes.
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MedicalResearch.co Interview with:
Katherine Ornstein, PhD MPH
Assistant Professor
Brookdale Department of Geriatrics and Palliative Medicine
Institute for Translational Epidemiology
Icahn School of Medicine at Mount Sinai
New York, NY 10029
Medical Research: What is the background for this study? What are the main findings?
Dr. Ornstein: There is an increased focus on the need to support caregivers and families, particularly at the End of Life (EOL). They play a critical role in the care process and decision making, yet this can be a very high stress role with an increased risk for negative consequences. Hospice services, which are increasing, are focused on palliative rather than curative care and include medical services, symptom management, spiritual counseling, social services and bereavement counseling delivered by an interdisciplinary team of professionals for dying patients. An important part of the hospice service is the provision of support to families during illness and after death. Prior research suggests that hospice (which is cost saving, has benefits to patients), may also be beneficial to families. Yet these studies have been largely limited to patients with cancer, have failed to adequately control for differences between patients who do or do not use hospice.
Overall, there was an increase in depressive symptoms after death. However, surviving spouses of those who used hospice were more likely to have a decrease in depressive symptoms. We found that the positive benefit of hospice was much stronger when we looked at least 1 year after death.
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MedicalResearch.com Interview with:
Lewis J. Smith, MD
Professor of Medicine and Associate Vice President for Research
Northwestern University and the Feinberg School of Medicine
Chicago, IL 60611
Medical Research: What is the background for this study? What are the main findings?
Dr. Smith: We previously observed in a survey of more than 1,000 patients with asthma that those consuming soy isoflavones in their diet had better lung functioning than their counterparts who consumed little or none. Using a more detailed soy questionnaire, we confirmed the observation in a different group of patients with asthma, and followed that up with laboratory studies. In cell culture studies, we saw that genistein, the major soy isoflavone, at levels that are achieved in individuals consuming a high soy diet, reduces eosinophilic inflammation, a key feature in asthma. In addition, people who consume more soy products, mostly in Japan and parts of China, generally have less asthma than in western countries. Although these data indicate a potential beneficial effect of soy isoflavones in patients with asthma and nutritional supplements are commonly used by people to treat and prevent disease and improve their health, there was little direct data to prove that the supplement is actually effective. As a result, we explored the effects of a soy isoflavone supplement in 386 adults and children aged 12 or older with poorly controlled asthma. All were taking medicine to treat their asthma – either corticosteroids or leukotriene modifiers – but none consumed soy more than once a week. In the randomized, double-blind study, half of the participants took a soy isoflavone supplement twice daily for six months, and the other half took a placebo. We found that the supplement, though able to increase blood levels of genistein, did not improve lung function, symptoms or measures of inflammation in these individuals.
(more…)MedicalResearch.co Interview with: Katherine Ornstein, PhD MPH Assistant Professor Brookdale Department of Geriatrics and Palliative Medicine Institute for Translational Epidemiology Icahn School of Medicine at...
MedicalResearch.com Interview with:
Robert E Kalb, M.D.
Clinical Professor of Dermatology
State University of New York at Buffalo School of Medicine and Biomedical Sciences
Buffalo Medical Group, P.C.
Buffalo, NY 14221
Medical Research: What is the background for this study? What are the main findings?
Dr. Kalb: It's important to evaluate the safety of biologics in the real world post-marketing setting, and in particular with respect to serious infections. We studied patients with psoriasis in the PSOLAR registry and evaluated the risk of various biologic therapies. We found that infliximab and adalimumab were associated with increased risk of serious infections when compared with non-biologic/non-methotrexate therapies, while ustekinumab and etanercept were not associated with increased risk. (more…)
MedicalResearch.com Interview with :
Prof. Alexandre Reymond
Director, Center for Integrative Genomics
University of Lausanne
Lausanne Switzerland
MedicalResearch : What is the background for this study?
Prof. Reymond: Though a subset of recurrent DNA copy number variants (differing numbers of copies of genetic sequence at locations in the genome; CNVs) with rare population prevalence are known to have strong impact on carrier’s health, up to now their association with phenotypes such as intellectual disability has been almost exclusively evaluated in clinical context using individuals ascertained for diagnostics of developmental disorders. Thus the contribution of these genetic variants to health, cognition and life quality in the general population remains unclear. We used a population biobank, that of Estonia (Estonian Genome Center, University of Tartu), which contains samples from 52,000 adult participants (representative 5% of the country’s adult population), a British birth cohort (The Avon Longitudinal Study of Parents and Children; ALSPAC) and two more population-based cohorts from the USA and Italy to explore the consequences of CNVs in presumptively healthy populations.
MedicalResearch : What are the main findings?
Prof. Reymond: Rare recurrent CNVs known to be causative for specific syndromes (termed genomic disorders) have a global population prevalence of around 1%. Contrary to popular assumption that carriers of these syndromic CNVs identified in unselected, but assumed to be healthy, adult population cohorts are asymptomatic, we found that they are associated with unrecognized, but serious clinical sequelae.
Additionally our results showed that individually rare (less than 1 in 2000 individuals) but collectively common (around 10% of population) intermediate-size CNVs are negatively associated with carriers’ educational attainment. Altogether our results suggest that the life quality of at least 1 of 40 people might be negatively affected by rare CNVs.
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MedicalResearch.com Interview with:
Rik Ossenkoppele PhD.
Postdoctoral researcher
UCSF Memory and Aging Center
MedicalResearch: What is the background for this study?
Dr. Ossenkoppele: Since 2004, several PET tracers have been developed that measure fibrillar amyloid-β plaques, a neuropathological hallmark of Alzheimer’s disease (AD). Through visual assessment by a nuclear medicine physician or quantitative cut-points, the presence or absence of amyloid-β pathology can be determined in the living human brain. The FDA, in support of the clinical application of amyloid imaging, has recently approved three of these PET tracers. A proportion of patients with other types of dementia then Alzheimer’s disease that harbor cerebral amyloid-β pathology, however, potentially limits the clinical utility of amyloid imaging. When ordering clinical amyloid PET scans and correctly interpreting the significance of amyloid PET results, clinicians need to understand the prevalence of amyloid-positivity across different types of dementia. It is also important to be aware of the relationships of amyloid-positivity prevalence and demographic (e.g. age and sex), cognitive and genetic (e.g. presence of the AD-risk allele apolipoprotein E [APOE] ε4) factors. Most amyloid PET studies to date come from single centers with modest sample sizes. We therefore conducted a meta-analysis with individual participant data from 29 cohorts worldwide, including 1359 patients with clinically diagnosed Alzheimer’s disease and 538 patients with non-AD dementia. We also included 1849 healthy controls with amyloid PET data, and an independent sample of 1369 AD patients with autopsy data from the NACC database.
MedicalResearch: What are the main findings?
Dr. Ossenkoppele: In patients clinically diagnosed with Alzheimer’s disease, the prevalence of amyloid-positivity decreased from 93% at age 50 to 79% at age 90. The drop in amyloid-positivity was most prominent in older Alzheimer’s disease patients who did not carry an APOE ε4 allele (~1/3 of these patients had a negative amyloid PET scan). This most likely reflects a mix of
1) clinical misdiagnoses (i.e. non-AD pathology causing an AD phenotype),
2) false negative PET scans (i.e. abundance of cerebral amyloid pathology that is not detected by PET), and
3) possibly elder patients need less amyloid pathology (sub-threshold levels for PET) to reach the stage of dementia due to age-related reductions in cognitive resilience (“cognitive reserve theory”) or simultaneous presence of multiple pathologies (“double-hit theory”).
The relatively high rate of amyloid-negative Alzheimer’s disease patients highlights the necessity of biomarker-informed patient selection for Alzheimer’s disease clinical trials.
In most patients clinically diagnosed with non-AD, the prevalence of amyloid-positivity increased with aging and was ~18% higher in APOE ε4 carriers. Presence of amyloid pathology in non-AD dementia may reflect
1) clinical misdiagnosis (i.e. AD pathology is the causative pathology), or
2) comorbid pathologies, where amyloid may be secondary to other pathologies that are actually driving the clinical presentation. Interestingly, patients with a clinical diagnosis of non-AD dementia who harbored cerebral amyloid pathology showed lower Mini-Mental State Examination scores (measure of global cognition), suggesting that amyloid-β is not just an innocent bystander.
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MedicalResearch.com Interview with:
Robert Wong, M.D., M.S.
Attending Physician, Gastroenterology & Hepatology
Director, GI Research
Highland Hospital I A member of Alameda Health System
Oakland, CA 94602
Medical Research: What is the background for this study? What are the main findings?
Dr. Wong: The main findings are that despite the stabilizing prevalence of metabolic syndrome, a large proportion of U.S. adults affected with metabolic still raises concern, especially given the significant health consequences associated with this syndrome. In additional to cardiovascular disease, metabolic syndrome also increases the risk of concurrent nonalcoholic fatty liver disease, often considered the hepatic manifestation of metabolic syndrome. Many studies, including work that our group has completed suggests that nonalcoholic fatty liver disease will soon become the leading etiology of chronic liver disease in the U.S. Furthermore, our finding that metabolic syndrome increases with increasing age, reflects the increased risk for metabolic syndrome associated diseases such as hypertension, diabetes, and dyslipidemia with older age. This is important to recognize given the aging population of the U.S.
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MedicalResearch.com Interview with:
C. Munro Cullum, PhD, ABPP
Professor of Psychiatry and Neurology & Neurotherapeutics
Pamela Blumenthal Distinguished Professor of Clinical Psychology
Chief of Psychology , Director of Neuropsychology
Univ. of Texas Southwestern Medical Center Dallas, TX
Medical Research: What is the background for this study? What are the main findings?
Dr. Cullum: My colleague and principal investigator of the study, Dr. John Hart and I have been interested in the acute and longer-term effects of traumatic brain injury for years, and because of my roles in the Alzheimer’s Disease Center and the Texas Institute for Brain Injury and Repair at the University of Texas Southwestern Medical Center, it seemed like a natural to begin studying older individuals with and without cognitive disorder who have a history of traumatic brain injury. Our main findings are two-fold:
First, we demonstrated that a history of concussion with loss of consciousness (which make up only about 10% of all concussions) was associated with smaller memory centers in the brain (the hippocampus) and lower memory results in our sample of retired professional football players. Concussions that did not result in loss of consciousness did not show that same strong association.
Second, our data suggest that patients with a clinical diagnosis of mild cognitive impairment (ie a memory disorder that does not grossly impair overall functioning but may lead to dementia) who also have a history of concussion with loss of consciousness show worse memory results and more brain atrophy than similar individuals diagnosed with mild cognitive impairment in the absence of a history of concussion.
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MedicalResearch.com Interview with:
Michael B. Weinstock, MD
Professor of Emergency Medicine, Adjunct
Department of Emergency Medicine, The Ohio State University College of Medicine
Emergency Department Chairman and Director of Medical Education, Mt. Carmel St. Ann's Dept. of Emergency Medicine
Columbus, Ohio
Medical Research: What is the background for this study?
Response: Patients with potential cardiac ischemia are often admitted to the hospital even after a negative evaluation in the emergency department due to concern about missed MI, unstable angina, or potential for cardiac arrhythmia.
Medical Research: What are the main findings?
Response: Our study was different than previous studies and clinical decision rules; instead of looking at a 30 day marker, which is important to the cardiologist, ours looked at the risk of a Clinically Relevant Adverse Cardiac Event (CRACE) occurring during hospitalization. These events included inpatient STEMI, life-threatening arrhythmia, cardiac or respiratory arrest, or death. The study found only 4 of these events out of 7266 patients studied and of the 4, two were possibly iatrogenic, suggesting that after a negative ED evaluation (including 2 negative serial cardiac enzyme tests, non-ischemic and interpretable ECG, and nonconcerning vital signs) a patient can be safely sent home for an expedited cardiac outpatient evaluation.
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MedicalResearch.com Interview with:
Robert A. Meguid, MD MPH FACS
Assistant Professor Section of General Thoracic Surgery
Division of Cardiothoracic Surgery Department of Surgery
University of Colorado Denver | Anschutz Medical Campus
Aurora, CO 80045
Medical Research: What is the background for this study? What are the main findings?
Dr. Meguid: The surgical literature on adverse outcomes after surgery on pregnant patients is conflicting. We know that the majority of surgery performed on pregnant patients is not elective (and just over 50% of it in the database studied was emergency surgery). We expected to find an increased rate of adverse outcomes in those pregnant patients. However, when we matched the pregnant and non-pregnant women who underwent surgery in the database, with excellent matching on all available preoperative characteristics and on the actual operation performed, we found similar, low rates of 30-day postoperative death and complication. In this study, pregnant patients had undergone a broad spectrum of different types of operations, including general, vascular, thoracic, head and neck, non-obstetric gynecologic and urologic, orthopedic, reconstructive, and neuro-surgery. Given the concern that we as surgeons have over operating on pregnant patients, both for the well-being of the patient and her child, our findings are reassuring. This suggests that we as a medical profession are diligent in minimizing risk to pregnant women who need surgery that cannot be delayed until after the child's birth. Again, this study faces the limitations of being unable to assess any short term harm done to the fetus and the subsequent long term outcome of the child.
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MedicalResearch.com Interview with:
William M. Sage MD JD
James R. Dougherty Chair for Faculty Excellence
School of Law
The University of Texas
Medical Research: What is the background for this study? What are the main findings?
Response: We reviewed settlement agreements in malpractice claims closed by The University of Texas System as part of a larger study on incorporating patient perspectives into safety improvement funded by the Agency for Health Care Research and Quality. Over the five years studied, we found that 88.7% of the 124 settlement agreements that met our study criteria contained non-disclosure provisions, but with little standardization or consistency. Restrictions on disclosure, which selectively burdened patients and their families, seemed broader than needed to protect health care providers from disparagement or to avoid attracting additional litigation. Medical malpractice could happen to anyone at any time during your visit to your hospital. If you or a member of your family have been the victim of medical palpractice you might want to look into getting help from someone like this Tate Law Offices Ft. Worth Personal Injury Law Firm or a law firm that is local to you that might be able to help with your case.
Nearly half of the agreements (46.4%) prohibited disclosure of the underlying facts, which may be inconsistent with emerging principles of patient safety and compassionate care, and 26.4% prohibited reporting to regulatory bodies, a restriction that the health system subsequently eliminated in response to our findings. Settlements reached after tort reform took full effect in Texas had stricter non-disclosure provisions than earlier settlements, suggesting greater leverage by defendants notwithstanding the reduced risk of additional litigation.
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MedicalResearch.com Interview with:
Dale N. Gerding, MD
Research Physician, Edward Hines, Jr., VA Hospital
Professor, Department of Medicine of Loyola University Chicago Stritch School of Medicine
Medical Research: What is the background for this study? What are the main findings?
Dr. Gerding: Naturally occurring strains of C. difficile lack the genes for production of the toxins that cause C. difficile infection (CDI) and are known as non-toxigenic C. difficile (NTCD). These strains when ingested by patients whose normal microbiota is disrupted by antibiotic treatment will harmlessly colonize the colon and remain in the gut for weeks to months. Specific strains of NTCD found in patients were shown to colonize the gut and prevent C. difficile infection when challenged with toxigenic C. difficile strains in animal models. One such NTCD strain, NTCD-M3, was shown to be safe and well tolerated in human volunteer trials and was used in the present study to determine if it would prevent recurrence of C. difficile infection in patients who had just completed treatment with vancomycin or metronidazole of either their first CDI episode or first recurrence of
C. difficile infection. 168 patients were randomized to receive by mouth in a liquid form, either 10,000 spores/day of NTCD-M3 for 7 days, 10 million spores/day for 7 days, 10 million spores/day for 14 days, or an identical placebo for 14 days. Primary outcome was safety, and secondary outcomes were the percent who colonized the gut with NTCD-M3 in the time period from end of treatment to week 6, and the rate of recurrent CDI in the patients at week 6. The results showed that NTCD-M3 was safe and well tolerated, and colonized the gut of 69% of patients who received it. The C. difficile infection recurrence rate was 30% in the placebo patients and 11% in patients who received any of the NTCD-M3 doses (P<.006). The best dose tested was 10 million spores/day for 7 days which resulted in a recurrence rate of only 5% (p<.01 vs placebo). Colonization of the gut was not permanent, but lasted a maximum of 22 weeks. The summary conclusion is that NTCD-M3 is safe, colonized the gut, and when it colonized the gut, reduced recurrence of C. difficile infection to 2% (p<.001 vs patients who were not colonized).
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MedicalResearch.com Interview with:
Thomas P. Dompier, PhD, ATC
President and Injury Epidemiologist
Datalys Center for Sports Injury Research and Prevention, Inc
Indianapolis, IN 46202
Adjunct Faculty Appointments
Ohio University Rocky Mountain University of Health Professions
University of South Carolina
Medical Research: What is the background for this study?
D: Dompler: Per the Institute of Medicine’s recent recommendations to better describe the incidence of concussion in sport across the entire spectrum of youth sports (5-23 years), this study is the first to provide an apples-to-apples comparison using epidemiologic data provided by healthcare providers (athletic trainers) who attended all practices and games and used the same methodology to report concussions and student-athlete exposure information.
Medical Research: What are the main findings?
D: Dompler:
a. The main findings are that the risk (how many players out of 100 can expect to suffer at least one concussion during the season) is lowest in the youth, and increases with age.
b. Game concussion rates (how many players out of 1000 exposed during a practice or game, includes multiple concussions to the same player) are highest in college but practice concussion rates are lowest in college during practice. This suggests more can be done during high school and youth practices to reduce concussion frequency (e.g. limiting how much time can be devoted to full contact, reducing player-to-player contact by teaching proper tackling without using full contact drills such as the Oklahoma drill and others).
c. While the rate is higher, there is still a substantial number of concussions that occur during practice (because there are more practices), therefore sports medicine staff should be available at both if possible (this is difficult at the youth level because of cost, however).
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MedicalResearch.com Interview with:
Lynn L. Moore, DSc, MPH
Department of Medicine
Boston University School of Medicine
Boston, Massachusetts
Medical Research: What is the background for this study?
Dr. Moore: The USDA’s current Dietary Guidelines for sodium intake have become increasingly controversial. Current recommendations include restricting sodium intake after the age of 2 years to no more than 2300 mg per day. For African-American adults and children, intakes should be restricted to no more than 1500 mg per day. Actual intake levels are much higher, with most Americans consuming about 3500 mg per day. Our goal was to estimate the effects of dietary sodium and potassium intakes on the change in blood pressure throughout adolescence.
We used data from the National Growth and Health Study, a prospective study of more than 2000 girls who were 9-10 years of age at the time of enrollment. Lifestyle factors were assessed repeatedly throughout the study, and blood pressure was measured annually. Dietary sodium and potassium were assessed using multiple sets of three-day diet records. We used longitudinal modeling to estimate the effects of dietary sodium and potassium on blood pressure change over 10 years.
Medical Research: What are the main findings?
Dr. Moore: In this study, there was no evidence for a beneficial effect of reduced sodium intake on blood pressure change during adolescence. By 19-20 years of age, girls who consumed more than 4000 mg of sodium per day had systolic and diastolic blood pressure levels that were similar to those seen among girls with lower levels of sodium intake. Specifically, there was no beneficial effect on blood pressure associated with sodium intakes of less than 2500 mg per day. These results were similar for blacks and whites. In contrast, the repeated measures analyses showed that girls who consumed more than 2400 mg of potassium per day had lower blood pressures throughout adolescence compared with girls consuming less than 1800 mg per day of potassium.
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MedicalResearch.com Interview with:
Mihaela S Stefan, MD FACP
Research Scientist, Center for Quality of Care Research
Director of Outpatient Perioperative Clinic and
Medical Consultation Program
Academic Hospitalist Baystate Medical Center
Assistant Professor of Medicine, Tufts University School of Medicine
Springfield MA 01199
MedicalResearch: What is the background for this study?
Dr. Stefan : Mortality rates for patients with pneumonia are publicly reported and are used to evaluate hospital performance. The rates are calculated using Medicare administrative claims data which provide limited insight into severity of illness and comorbidities that may be associated with death. The mortality measure does not take into consideration advance directives or changes in goals of care preferences during hospitalization.
MedicalResearch: What are the main findings?
Dr. Stefan : In this retrospective chart review of 202 adults who died with a principal diagnosis of pneumonia between January 2008 and December 2012 in 3 hospitals in MA, we assessed the proportion of patients for whom pneumonia was determined to play a major or a minor role in the patient death. Pneumonia was considered a minor cause if the patient had advanced life threatening illnesses and this was found in 82% of the deaths. More than half of the patients were DNR at admission to the hospital. The majority of patients who died were frail elderly with life-threatening conditions who decided to forgo aggressive care at some point during their admission. Only a small fraction of deaths in the pneumonia mortality measure were the direct result of pneumonia.
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MedicalResearch.com Interview with:
Addie Weaver PhD
Research Investigator and LEO Adjunct Lecturer
School of Social Work
University of Michigan
Medical Research: What is the background for this study? What are the main findings?
Dr. Weaver: The mental health of both African Americans and rural Americans has been understudied. Though depression is one of the most common, debilitating mental illnesses among women, very little is known about depression among African American women living in rural areas of the United States. In fact, much of what we know about rural women's depression in general is based on research conducted with community samples, as limited epidemiolgical research includes large enough samples of both African American respondents and rural respondents to assess potentially important subgroup differences by urbanicity (e.g., urban, suburban, rural) and race. Our study used the National Survey of American Life, the first and only nationally representative survey of African Americans, to examine the interaction of urbanicity and race/ethnicity on Major Depressive Disorder and mood disorder prevalence among African American and non-Hispanic white women residing in the South.
We found that rural residence has a differential effect on depression and mood disorder for African American women and non-Hispanic white women. Overall, African American women living in rural areas experienced significantly lower odds of meeting criteria for lifetime and 12-month Major Depressive Disorder and lifetime and 12-month mood disorder than urban African American women. Conversely, non-Hispanic white women residing in rural areas had significantly higher odds of meeting criteria for lifetime and 12-month Major Depressive and lifetime and 12-month mood disorder when compared to rural African American women, and had significantly higher prevalence rates of 12-month Major Depressive Disorder and 12-month mood disorder than urban non-Hispanic white women. All analyses controlled for age, education level, household income, and marital status, suggesting that the urbanicity differences were not due to resource disparities often experienced by individuals residing in rural communities. (more…)