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Andrea Cipriani, Georgia Salanti, Toshi A Furukawa, Matthias Egger, Stefan Leucht, Henricus G Ruhe, Erick H Turner, Lauren Z Atkinson, Anna Chaimani, Julian P T Higgins, Yusuke Ogawa, Nozomi Takeshima, Yu Hayasaka, Hissei Imai, Kiyomi Shinohara, Aran Tajika, John P A Ioannidis, John R Geddes
No abstract text is available yet for this article.
April 5, 2018: Lancet Psychiatry
Ioannis Ioannidis, Jui-Han Huang
Extra-ovarian neoplasms incidentally discovered during cesarean section are very rare. Here we report a case of inflammatory myofibroblastic tumor found during cesarean section of a 30-year-old, full-term woman, forming a mass in her cul-de-sac. Histology revealed an extensively decidualized spindle cell process, positive for anaplastic large cell lymphoma kinase (ALK) through immunohistochemistry and fluorescent in situ hybridization (FISH). To the best of our knowledge, this is the first presentation of inflammatory myofibroblastic tumor in this location without concurrent intrauterine component, that additionally demonstrates this degree of decidualization, mimicking ectopic decidua...
April 3, 2018: International Journal of Gynecological Pathology
Maria Magana, Christina Sereti, Anastasios Ioannidis, Courtney A Mitchell, Anthony R Ball, Emmanouil Magiorkinis, Stylianos Chatzipanagiotou, Michael R Hamblin, Maria Hadjifrangiskou, George P Tegos
Bacteria can form single- and multispecies biofilms exhibiting diverse features based upon the microbial composition of their community and microenvironment. The study of bacterial biofilm development has received great interest in the past 20 years and is motivated by the elegant complexity characteristic of these multicellular communities and their role in infectious diseases. Biofilms can thrive on virtually any surface and can be beneficial or detrimental based upon the community's interplay and the surface...
July 2018: Clinical Microbiology Reviews
Rafael Dal-Ré, Perrine Janiaud, John P A Ioannidis
INTRODUCTION: Pragmatic randomized controlled trials (RCTs) mimic usual clinical practice and they are critical to inform decision-making by patients, clinicians and policy-makers in real-world settings. Pragmatic RCTs assess effectiveness of available medicines, while explanatory RCTs assess efficacy of investigational medicines. Explanatory and pragmatic are the extremes of a continuum. This debate article seeks to evaluate and provide recommendation on how to characterize pragmatic RCTs in light of the current landscape of RCTs...
April 3, 2018: BMC Medicine
David Moher, Florian Naudet, Ioana A Cristea, Frank Miedema, John P A Ioannidis, Steven N Goodman
Assessment of researchers is necessary for decisions of hiring, promotion, and tenure. A burgeoning number of scientific leaders believe the current system of faculty incentives and rewards is misaligned with the needs of society and disconnected from the evidence about the causes of the reproducibility crisis and suboptimal quality of the scientific publication record. To address this issue, particularly for the clinical and life sciences, we convened a 22-member expert panel workshop in Washington, DC, in January 2017...
March 29, 2018: PLoS Biology
John P A Ioannidis
OBJECTIVES: Meta-analyses are considered generally as the highest level of evidence, but concerns have been voiced about their massive, low-quality production. This paper aimed to evaluate the landscape of meta-analyses in the field of occupational and environmental health and medicine. METHODS: Using relevant search terms, all meta-analyses were searched for, but those published in 2015 were assessed for their origin, whether they included randomised trials and individual-level data and whether they had authors from the industry or consultancy firms...
March 24, 2018: Occupational and Environmental Medicine
Katherine M Flegal, John P A Ioannidis
The term "obesity paradox" is a figure of speech, not a scientific term. The term has no precise definition and has been used to describe numerous observations that have little in common other than the finding of an association of obesity with a favorable outcome. The terminology has led to misunderstandings among researchers and the public alike. It's time for authors and editors to abandon the use of this term. Simply labeling counterintuitive findings as the "obesity paradox" adds no value...
April 2018: Obesity
John P A Ioannidis
No abstract text is available yet for this article.
March 22, 2018: JAMA: the Journal of the American Medical Association
Stuart K Kim, John P A Ioannidis, Marwa A Ahmed, Andrew L Avins, John P Kleimeyer, Michael Fredericson, Jason L Dragoo
Plantar fascial disorder is comprised of plantar fasciitis and plantar fibromatosis. Plantar fasciitis is the most common cause of heel pain, especially for athletes involved in running and jumping sports. Plantar fibromatosis is a rare fibrous hyperproliferation of the deep connective tissue of the foot. To identify genetic loci associated with plantar fascial disorders, a genome-wide association screen was performed using publically available data from the Research Program in Genes, Environment and Health including 21,624 cases of plantar fascial disorders and 80,879 controls...
March 13, 2018: International Journal of Sports Medicine
John P A Ioannidis
Meta-research is the study of research itself: its methods, reporting, reproducibility, evaluation, and incentives. Given that science is the key driver of human progress, improving the efficiency of scientific investigation and yielding more credible and more useful research results can translate to major benefits. The research enterprise grows very fast. Both new opportunities for knowledge and innovation and new threats to validity and scientific integrity emerge. Old biases abound, and new ones continuously appear as novel disciplines emerge with different standards and challenges...
March 13, 2018: PLoS Biology
Pantelis Maiovis, Panagiotis Ioannidis, Georgios Gerasimou, Anna Gotzamani-Psarrakou, Dimitrios Karacostas
BACKGROUND AND OBJECTIVE: Cognitive reserve (CR) mediates the clinical expression of brain pathology in Alzheimer's disease, while there are much less relevant data in frontotemporal dementia (FTD). In the present study we examined whether CR, measured using the Cognitive Reserve Index (CRI), correlated with regional cerebral blood flow (rCBF) in Greek FTD patients. METHODS: Eighty FTD patients, i.e., 47 with behavioral variant FTD (bvFTD) and 33 with primary progressive aphasia (PPA), were enrolled into this study...
March 7, 2018: Neuro-degenerative Diseases
Ronald E Jung, Alexis Ioannidis, Christoph H F Hämmerle, Daniel S Thoma
In the esthetic zone, in the case of tooth extraction, the clinician is often confronted with a challenge regarding the optimal decision-making process for providing a solution using dental implants. This is because, after tooth extraction, alveolar bone loss and structural and compositional changes of the covering soft tissues, as well as morphological alterations, can be expected. Ideally, the therapeutic plan starts before tooth extraction and it offers three options: spontaneous healing of the extraction socket; immediate implant placement; and techniques for preserving the alveolar ridge at the site of tooth removal...
February 27, 2018: Periodontology 2000
Andrea Cipriani, Toshi A Furukawa, Georgia Salanti, Anna Chaimani, Lauren Z Atkinson, Yusuke Ogawa, Stefan Leucht, Henricus G Ruhe, Erick H Turner, Julian P T Higgins, Matthias Egger, Nozomi Takeshima, Yu Hayasaka, Hissei Imai, Kiyomi Shinohara, Aran Tajika, John P A Ioannidis, John R Geddes
BACKGROUND: Major depressive disorder is one of the most common, burdensome, and costly psychiatric disorders worldwide in adults. Pharmacological and non-pharmacological treatments are available; however, because of inadequate resources, antidepressants are used more frequently than psychological interventions. Prescription of these agents should be informed by the best available evidence. Therefore, we aimed to update and expand our previous work to compare and rank antidepressants for the acute treatment of adults with unipolar major depressive disorder...
February 20, 2018: Lancet
John P A Ioannidis, Muin J Khoury
Genomic and other related big data (Big Genomic Data, BGD for short) are ushering a new era of precision medicine. This overview discusses whether principles of evidence-based medicine (EBM) hold true for BGD and how they should be operationalized in the current era. Major EBM principles include the systematic identification, description and analysis of the validity and utility of BGD, the combination of individual clinical expertise with individual patient needs and preferences, and the focus on obtaining experimental evidence, whenever possible...
February 20, 2018: Human Molecular Genetics
George Mantziaras, Natalia Gc Vasileiou, Katerina S Ioannidi, Vasiliki S Mavrogianni, Dimitrios A Gougoulis, George C Fthenakis, Ioannis G Petridis, Mariana S Barbagianni
No abstract text is available yet for this article.
February 2018: Journal of Dairy Research
Christopher D Gardner, John F Trepanowski, Liana C Del Gobbo, Michelle E Hauser, Joseph Rigdon, John P A Ioannidis, Manisha Desai, Abby C King
Importance: Dietary modification remains key to successful weight loss. Yet, no one dietary strategy is consistently superior to others for the general population. Previous research suggests genotype or insulin-glucose dynamics may modify the effects of diets. Objective: To determine the effect of a healthy low-fat (HLF) diet vs a healthy low-carbohydrate (HLC) diet on weight change and if genotype pattern or insulin secretion are related to the dietary effects on weight loss...
February 20, 2018: JAMA: the Journal of the American Medical Association
Konstantinos Ioannidis, Matthias S Treder, Samuel R Chamberlain, Franz Kiraly, Sarah A Redden, Dan J Stein, Christine Lochner, Jon E Grant
BACKGROUND AND AIMS: Problematic internet use (PIU; otherwise known as Internet Addiction) is a growing problem in modern societies. There is scarce knowledge of the demographic variables and specific internet activities associated with PIU and a limited understanding of how PIU should be conceptualized. Our aim was to identify specific internet activities associated with PIU and explore the moderating role of age and gender in those associations. METHODS: We recruited 1749 participants aged 18 and above via media advertisements in an Internet-based survey at two sites, one in the US, and one in South Africa; we utilized Lasso regression for the analysis...
February 12, 2018: Addictive Behaviors
Florian Naudet, Charlotte Sakarovitch, Perrine Janiaud, Ioana Cristea, Daniele Fanelli, David Moher, John P A Ioannidis
OBJECTIVES: To explore the effectiveness of data sharing by randomized controlled trials (RCTs) in journals with a full data sharing policy and to describe potential difficulties encountered in the process of performing reanalyses of the primary outcomes. DESIGN: Survey of published RCTs. SETTING: PubMed/Medline. ELIGIBILITY CRITERIA: RCTs that had been submitted and published by The BMJ and PLOS Medicine subsequent to the adoption of data sharing policies by these journals...
February 13, 2018: BMJ: British Medical Journal
Jason Ioannidis, Judith Risse, F Xavier Donadeu
The value of circulating microRNAs (miRNAs) as noninvasive biomarkers of human disease has been extensively demonstrated. Significant potential also exists in other species, particularly in relation to control of veterinary diseases and selection/monitoring of production traits in livestock. Although robust protocols have been developed for miRNA profiling of human biofluids, significant optimization may be required before these can be applied to other species. In this chapter, we describe protocols for small-RNA sequencing and RT-qPCR analyses of plasma samples from livestock species...
2018: Methods in Molecular Biology
Benjamin Djulbegovic, Paul Glasziou, Farina A Klocksieben, Tea Reljic, Magali VanDenBergh, Rahul Mhaskar, John P A Ioannidis, Iain Chalmers
OBJECTIVES: Evaluate how often the European Medicines Agency (EMA) has authorized drugs based on non-randomized studies and whether there is an association between treatment effects and EMA preference for further testing in RCTs. STUDY DESIGN AND SETTING: We reviewed all initial marketing authorizations in the EMA database on human medicines between 1995 and 2015 and included authorizations granted without randomized data. We extracted data on treatment effects and EMA preference for further testing in RCTs...
February 9, 2018: Journal of Clinical Epidemiology
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