Dr. Runhaar[/caption]
Jos Runhaar, PhD
Erasmus MC
Department of General Practice
Rotterdam
The Netherlands
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Most international guidelines report an overall lack of efficacy of glucosamine for osteoarthrits. We however know that it is a very heterogeneous disease. Therefore, it is possible that there are certain subgroups of osteoarthritis patients that actually might have effect from glucosamine; for instance subgroups based on different pathologies underlying the clinical presentation, different co-morbidities, or different disease stages.
For investigating efficacy in subgroups large sample sizes are needed, and certain methodological techniques are necessary, to get a valid and robust answer. Several years ago, a group of renowned international osteoarthritis researchers started the OA Trial Bank especially for investigating these subgroup effects of osteoarthritis treatments and collect individual patient data of worldwide-performed intervention studies in osteoarthritis patients. When using the individual patient data of multiple studies, it brings us the large sample size and allows us to use the right methods. We do these subgroup analyses in the OA Trial Bank for many different interventions, not just for glucosamine. The subgroup analyses for glucosamine and for corticosteroid injections are published, the others are ongoing (for instance exercise, orthoses and topicals) or planned and still waiting for funding.
The study did show, however, that glucosamine can be extremely beneficial for pets, and specifically dogs who have joint related issues. Knowing the most valuable sources of glucosamine for dogs is important, as it can be extracted and gained from multiple sources, and each have their own varied levels of quality and potency.
Dr. Krista Huybrechts[/caption]
Krista F. Huybrechts, MS PhD
Assistant Professor of Medicine
Brigham and Women’s Hospital
Harvard Medical School
Boston, MA 02120
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Neonatal drug withdrawal is common; in the U.S. about 1 infant is born every 25 minutes with signs of drug withdrawal. Neonatal drug withdrawal is a well-recognized complication of intrauterine exposure to illicit or prescription opioids, but other psychotropic medications can also cause signs of withdrawal. Psychotropic medications are frequently co-prescribed with opioids in pregnancy, and the use of both has increased significantly, raising concerns about an increase in the incidence and severity of neonatal drug withdrawal due to potential drug-drug interactions, but these risks are not well understood.
In this study, we found a 30-60% increase in the risk of neonatal drug withdrawal associated with co-exposure to antidepressants, benzodiazepines and gabapentin, compared to opioids alone; no significant increase in risk was observed for atypical antipsychotics and Z-drugs. Exposure to psychotropic polypharmacy along with opioids was associated with a two-fold increased risk of withdrawal.
Prof. Thangaratinam[/caption]
Shakila Thangaratinam
Professor of Maternal and Perinatal Health
Joint Director of BARC
(Barts Research Centre for Women's Health)
Women's Health Research Unit | Multidisciplinary Evidence Synthesis Hub (MESH)
Barts and the London School of Medicine and Dentistry
R & D Director for Women's Health
Queen Mary University of London
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Pregnant women who are overweight or obese, or who gain excess weight gain in pregnancy are at high risk of complications. We wanted to find
Dr. Ziyad Al-Aly[/caption]
Ziyad Al-Aly MD FASN
Assistant Professor of Medicine
Co-director for Clinical Epidemiology Center
Department of Medicine, Washington University School of Medicine
Saint Louis, Missouri
Associate Chief of Staff for Research and Education
Veterans Affairs Saint Louis Health Care System
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Proton Pump Inhibitors (PPI) are commonly used, and they are associated with adverse events including kidney disease, dementia, fractures, cardiovascular disease, and pneumonia. We asked the question of whether this translates to increased risk of death.
We conducted this large cohort study to specifically examine the association between PPI use and risk of death. The results consistently showed an association between use of PPI and increased mortality risk. Moreover, there was a graded relationship between duration of PPI use and risk of death in that longer duration of use was associated with incrementally higher risk of death.
Dr. Elmore[/caption]
Joann G. Elmore M.D., M.P.H.
Professor of Medicine,
Adjunct Professor of Epidemiology,
University of Washington School of Medicine
Harborview Medical Center
Seattle, WA 98104-2499
MedicalResearch.com: What is the background for this study?
JE: Previous studies on diagnostic accuracy in interpreting melanocytic lesions exist but have small sample size, inclusion of experts only, or small numbers of specimens. We sought to examine accuracy and reproducibility in melanocytic skin lesions by improving upon the methodological limitations of previous studies. Specifically, we recruited a large national sample of practicing community and academic pathologists with a wide range of experience, and we utilized a large sample of biopsy cases that were carefully selected. Given that diagnostic errors can lead to patient deaths and invasive melanoma kills more than 9,000 Americans each year, we wanted to study the issue of diagnostic accuracy in interpreting melanocytic skin lesions in a very robust fashion.
MedicalResearch.com Interview with: Dr. Martina Persson Clinical Epidemiology Unit Department of Medicine Solna Karolinska University Hospita MedicalResearch.com: What is the background for this study? What are the main findings? Response: It is well known that obesity increases risks of several maternal, fetal and neonatal complications including congenital malformations. However, it has not been clear if risks...
Dr. Adderley[/caption]
Dr Nicola Adderley BA, MSci (Cantab), MA, MPhil, PhD
Institute of Applied Health Research
Research Fellow
University of Birmingham
MedicalResearch.com: What is the background for this study?
Response: Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia and a major global public health problem. It is associated with a five-fold increase in risk of stroke.
There are three types of AF – paroxysmal, persistent or permanent. In paroxysmal AF, episodes come and go, and usually stop without any treatment. With persistent AF episodes can last for periods of more than seven days and are treated with medication or a medical procedure called cardioversion. In permanent AF, the irregular heartbeat is present all the time and cardioversion has failed to restore a normal heart rhythm.
All patients with AF, including paroxysmal AF, are at an increased risk of stroke. UK guidelines recommend anticoagulant treatment, such as the blood-thinning drug warfarin, for patients with all types of AF in order to reduce the risk of stroke.
Our study aimed to determine whether patients with paroxysmal AF are less likely to be treated with anticoagulants than patients with persistent or permanent AF and to investigate trends in treatment between 2000 and 2015.
Dr. Reginster[/caption]
Jean-Yves Reginster M.D.,PH.D.
Professor of Epidemiology, Public Health and Health Economics
Head of the Bone and Cartilage Metabolism Unit
University of Liège
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Whereas several recommendations, issued by scientific societies, recommend to use Symptom-Modifying Slow Acting Drugs (SYSADOAs) for the symptomatic and structural management of osteoarthritis, no medication is currently registered, in this particular indication, by the European Medicines Agency (EMA) or by the Food and Drug Administration (FDA).
This study is the first study, conducted, with a SYSADOA which fully complies with the requirements of the EMA for the assessment of drugs to be used in the treatment of osteoarthritis, i.e. a six-month duration, two co-primary endpoints (pain and function) and a three-arm design, with a placebo and an active comparator. The main findings are that pharmaceutical grade chondroitin sulfate provides an improvement in pain and function, which is greater than placebo and not distinguishable from celecoxib, a non-steroidal anti-inflammatory drug currently licensed for the symptomatic management of osteoarthritis.
Dr. Tsugawa[/caption]
Yusuke Tsugawa, MD, MPH, PhD
Harvard T. H. Chan School of Public Health
Department of Health Policy and Management
Cambridge, MA 02138
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Although evidence has suggested that older physicians may experience a
decline in medical knowledge and are less likely to adhere to standard care, patients in general had a perception that older doctors are more
experienced and therefore provide superior care.
Using a nationally representative sample of Medicare beneficiaries who were hospitalized
for medical conditions in 2011-2014, we found that patients treated by
younger doctors have lower 30-day mortality compared to those cared
for by older doctors, after adjusting for patient, physician, and
hospital characteristics.
Tine Vertommen[/caption]
Tine Vertommen, Criminologist
Faculty of Medicine and Health Sciences
Universiteitsplein 1
Antwerp, Belgium
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: A recent prevalence study into interpersonal violence against child athletes in the Netherlands and Belgium showed that 6% experienced severe sexual violence, 8% experienced severe physical violence, and 9% of respondents experienced severe psychological violence in sport (Vertommen et al., 2016). While general literature has repeatedly shown that exposure to interpersonal violence during childhood is associated with mental health problems in adulthood, this relationship has not yet been demonstrated in (former) athletes. Thus, the objective of the current study is to assess the long-term consequences of these experiences on adult mental health and quality of life.
Dr. Bart Ferket[/caption]
Bart S Ferket, MD, PhD
Assistant Professor, Population Health Science and Policy
Icahn School of Medicine at Mount Sinai
MedicalResearch.com: What is the background for this study?
Response: The annual rate of total knee replacement in the US has doubled since 2000, and especially in those aged 45-65 utilization of this procedure has increased. The increase in practice cannot fully be explained by an increase in the prevalence of osteoarthritis and population growth, and has been partly attributed to expansion to people with less severe symptoms. The total number of procedures performed each year now exceeds 640,000. The evidence for the benefit of total knee replacement has been based on studies without a comparison group of no total knee replacement, and so far only one randomized clinical trial has been published. Although the published literature shows large improvements of pain, physical functioning and overall quality of life following the procedure, patients included in these studies generally had severe preoperative symptoms. A number of studies have suggested, however, that up to a third of recipients of total knee replacement show no benefit, and that those with poor physical functioning before surgery may show larger improvements. Therefore, the current US patient population undergoing total knee replacement might show less significant improvement in symptoms on average as compared with a hypothetical scenario in which eligibility is limited to those with more severe symptoms.
Dr. Eric Sun[/caption]
Eric C Sun MD PhD, assistant professor
Department of Anesthesiology
Perioperative and Pain Medicine
Stanford University School of Medicine
Stanford, CA
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: There have been large increases in opioid-related adverse events over the past decade. The goal of our study was to examine the extent to which these increases may have been driven by combined use of opioids and benzodiazepines, a combination that is known to be potentially risky. Overall, we found that the combined use of opioids and benzodiazepines nearly doubled (80% increase) between 2001 and 2013, and that opioid users who also used benzodiazepines were at a higher risk of an opioid-related adverse event. Indeed, our results suggest eliminating the combined use of opioids and benzodiazepines could have reduced the population risk of an opioid-related adverse event by 15%.
Dr. Kyrgiou[/caption]
Dr Maria Kyrgiou MSc, PhD, MRCOG
Clinical Senior Lecturer & Consultant in Gynaecologic Oncology
IRDB - Department of Surgery and Cancer, Imperial College London
West London Gynaecological Cancer Centre, Queen Charlotte's & Chelsea-Hammersmith Hospital, Imperial Healthcare NHS Trust
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Obesity has become a major public health challenge and it's prevalence worldwide has more than doubled amongst women n the last four decades. Excess body weight has been associated with an increased risk of developing and dying from numerous cancers. Although the reported associations may be potentially causal, some of the associations may be flawed due to inherent study biases such as residual confounding and selective reporting of positive results.
We included 204 meta-analyses investigating associations between adiposity and the development or death from 36 primary cancers and their sub-types. Adiposity was associated with a higher risk of developing esophageal adenocarcinoma, gastric cardia, colon and rectal cancer in men, biliary tract system, pancreatic, postmenopausal breast among HRT non-users, endometrial, ovarian, and kidney cancer and multiple myeloma.
Dr. Graner[/caption]
Dr. Sophie Graner
Department of Women's and Childrens Health
Karolinska Institute, Stockholm, Sweden
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Pregnant women are at increased risks of severe disease and death due to influensa infection, as well as hospitalization. Also influenza and fever increase the risk of adverse pregnancy outcomes for their infants such as intrauterine death and preterm birth. Due to this, the regulatory agencies in Europe and the US recommended post exposure prophylaxis and treatment for pregnant women with neuraminidase inhibitors during the last influenza pandemic 2009-10. Despite the recommendations, the knowledge on the effect of neuraminidase inhibitors on the infant has been limited. Previously published studies have not shown any increased risk, but they have had limited power to assess specific neonatal outcomes such as stillbirth, neonatal mortality, preterm birth, low Agar score, neonatal morbidity and congenital malformations.
Dr. Jonas Thorlund[/caption]
Jonas Bloch Thorlund
Associate Professor (MSc, PhD)
Department of Sports Science and Clinical Biomechanics
Research Unit for Musculoskeletal Function and Physiotherapy
University of Southern Denmark
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Arthroscopic partial meniscectomy is a very common knee surgery. Research evidence has seriously questioned the effect of this type of surgery for degenerative meniscal tears in middle-aged and older patients. Most young patients with traumatic meniscal injury (from sports or similar) also undergo this type of surgery. There is a general understanding that young patients with traumatic tears experience larger improvements in patient reported pain, function and quality of life. However, evidence for this presumption is sparse.
Dr. Gustavo Machado[/caption]
Dr. Gustavo Machado BPhty (Hons) Cert.MDT
The George Institute for Global Health
Sydney Medical School, University of Sydney
Sydney, New South Wales, Australia
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: People with back pain are usually told by their health care practitioners to take analgesic medications to relieve their pain. But our previous research published in the BMJ showed that paracetamol does not have a measurable impact on patient’s symptoms. This resulted in recent changes in guidelines' recommendations. The 2017 National Institute for Health and Care Excellence (NICE) guidelines/UK no longer recommend paracetamol as a stand-alone intervention for back pain.
So now non-steroidal anti-inflammatory drugs (NSAIDs) are recommended as the analgesic of first choice. However, our results show that compared to placebo, commonly used NSAIDs, such as Ibuprofen (e.g. Nurofen) and Diclofenac (e.g. Voltaren), provide only small benefits for people with back pain while increasing the risk of gastrointestinal adverse effects by 2.5 times.
Dr. Yusuke Tsugawa[/caption]
Yusuke Tsugawa, MD, MPH, PhD
Research Associate at Department of Health Policy and Management
Harvard T.H. Chan School of Public Health
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Prior evidence has been mixed as to whether or not patient outcomes
differ between U.S. and foreign medical graduates.
However, previous studies used small sample sizes or data from a small number of states.
Therefore, it was largely unknown how international medical graduates
perform compared with US medical graduates.
To answer this question, we analyzed a nationally representative
sample of Medicare beneficiaries admitted to hospitals with a medical
condition in 2011-2014. Our sample included approximately 1.2 million
hospitalizations treated by 40,000 physicians. After adjusting for
severity of illness of patients and hospitals (we compared physicians
within the same hospital), we found that patient treated by
international medical graduates had lower mortality than patients
cared for by US medical graduates (adjusted 30-day mortality rate
11.2% vs 11.6%, p<0.001). We observed no difference in readmissions,
whereas costs of care was slightly higher for international medical
graduates.
Prof. Regina Kunz[/caption]
Prof. Dr. Regina Kunz
Professorin für Versicherungsmedizin
Evidence-based Insurance Medicine I Departement Klinische Forschung
Universitätsspital Basel
Basel Switzerland
MedicalResearch.com: What is the background for this study?
Response: Many workers seek wage replacement benefits due to a disabling illness or injury. Public and private insurance systems provide wage replacement benefits for such employees, as long as eligibility criteria are met. Insurers often arrange for evaluation of eligibility by medical professionals, but there are concerns regarding low quality evaluations and poor reliability between medical experts assessing the same claimant. In order to better understand this situation, we performed a systematic review of reproducibility studies on the inter-rater agreement in evaluation of disability.
We carried out a systematic review of 23 studies, conducted between 1992-2016, from 12 countries in Europe, North America, Australia, the Middle East, and Northeast Asia. The studies include those carried out in an insurance setting, with medical experts assessing claimants for work disability benefits, and in a research setting, where evaluation of patients took place outside of actual assessments, for example, for rehabilitation.
Dr. Spyridoula Maraka[/caption]
Dr. Spyridoula Maraka
Assistant professor of medicine
Division of Endocrinology and Metabolism
Center for Osteoporosis and Metabolic Bone Diseases
University of Arkansas for Medical Sciences and
Central Arkansas Veterans Health Care System
Little Rock Arkansas
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Subclinical hypothyroidism, a mild thyroid dysfunction, has been associated in pregnancy with multiple adverse outcomes. Our aim was to estimate the effectiveness and safety of thyroid hormone treatment among pregnant women with subclinical hypothyroidism.
Using a large national US dataset, we identified 5,405 pregnant women diagnosed with subclinical hypothyroidism. Of these, 843 women, with an average pretreatment TSH concentration of 4.8 milli-international units per liter, were treated with thyroid hormone. The remaining 4,562, with an average pretreatment TSH concentration of 3.3 milli-international units per liter, were not treated.
Compared with the untreated group, treated women were 38 percent less likely to experience pregnancy loss. However, they were more likely to experience a preterm delivery, gestational diabetes or preeclampsia. Moreover, the benefit of thyroid hormone treatment on pregnancy loss was seen only among women with higher TSH levels (4.1 to 10 mIU/L) before treatment. We also found that for women with lower levels of TSH (2.5–4.0 mIU/L), the risk of gestational hypertension was significantly higher for treated women than for untreated women.
Dr. Talar Markossian[/caption]
Talar W. Markossian PhD MPH
Assistant Professor of Health Policy
Loyola University Chicago
2160 S. First Ave, CTRE 554
Maywood, IL 60153
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Approximately 10% of U.S. adults currently have non-dialysis dependent chronic kidney disease (CKD), while dialysis dependent CKD accounts for only 0.5% of the U.S. population. The escalation in healthcare expenditures associated with CKD starts prior to requirement for dialysis, and treatment costs escalate as non-dialysis dependent CKD progresses.
We examined the total healthcare expenditures including out-of-pocket costs for non-dialysis dependent and compared these expenditures with those incurred for cancer and stroke in the U.S. adult population. After adjusting for demographics and comorbidities, the adjusted difference in total direct healthcare expenditures was $4746 (95% CI $1775-$7718) for CKD, $8608 (95% CI $6167-$11,049) for cancer and $5992 (95% CI $4208-$7775) for stroke vs. group without CKD, cancer or stroke. Adjusted difference in out-of-pocket healthcare expenditures was highest for adults with CKD ($760; 95% CI 0-$1745) and was larger than difference noted for cancer ($419; 95% CI 158–679) or stroke ($246; 95% CI 87–406) relative to group without CKD, cancer or stroke.