Su1607 Risk of Serious Upper Gastrointestinal (UGI) Complications With Concomitant use of Non-Selective NSAIDs and Clopidogrel for at Least 4 Weeks: A Series of Systematic Reviews of Randomized Controlled Trials (RCT), Cohort Studies and Case Control Studies

2012 ◽  
Vol 142 (5) ◽  
pp. S-463
Author(s):  
Grigorios I. Leontiadis ◽  
Yuhong Yuan ◽  
Frances Tse ◽  
Richard H. Hunt ◽  
Paul Moayyedi
2021 ◽  
Author(s):  
Laura Paige Penkert ◽  
Ruogu Li ◽  
Jing Huang ◽  
Anil Gurcan ◽  
Mei Chun Chung ◽  
...  

Pork is a frequently consumed red meat that provides substantial amounts of energy, macronutrients, and micronutrients to the diet. Its role in human nutrition and health is controversial and a plethora of data exist in the peer-reviewed scientific literature. Therefore, we conducted a scoping review of clinical and population-based studies to assess the effects of pork consumption on human nutrition and health. Results are reported according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) extension for scoping reviews. Data were extracted from 86 studies, including 16 randomized controlled trials, 1 uncontrolled trial, 7 cohort studies, 4 nonrandomized controlled trials, 4 case-cohort and nested case-control studies, 33 case-control studies, and 21 cross-sectional studies. Intervention studies were conducted in healthy individuals and were short to moderate in duration. The effect of pork intake on patients’ nutrient status was the most commonly assessed outcome. The majority of observational studies assessed the effect of pork on cancer incidence, but no studies assessed the effects of pork on inflammation or oxidative stress. No interventional studies explored diabetes mellitus risk, and only one study assessed cancer risk associated with pork consumption. Several micronutrients in pork, including zinc, iron, selenium, choline, thiamin, and vitamins B6 and vitamin B12, are thought to influence cognitive function and may prove to be a unique area of research. To date, there is a dearth of high-quality randomized controlled trials assessing the effects of pork intake on disease risk factors and outcomes. This review helps highlight the many research gaps that future studies should be designed to address.


2021 ◽  
pp. 121-134
Author(s):  
J Patrick Vaughan ◽  
Cesar Victora ◽  
A Mushtaque R Chowdhury

Observational health studies look for associations between exposures and possible subsequent health outcomes. To test hypotheses, case-control studies look backward in time to earlier exposures while cohort studies observe exposed and non-exposed groups forward in time to record outcome incidence data. Both designs test hypotheses for associations while cohorts can also identify causality. Interventions are best tested using randomized controlled trials for efficacy and community trials for effectiveness. These studies utilize complicated methods and require specialist expertise.


Author(s):  
Mark Harrison

This chapter describes types of trials as applied to Emergency Medicine, and in particular the Primary FRCEM examination. The chapter outlines the key details and advantages and disadvantages of case reports, case series, cohort studies, case–control studies, randomized controlled trials, crossover trials, systematic reviews, and meta-analysis. This chapter is laid out exactly following the RCEM syllabus, to allow easy reference and consolidation of learning.


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