نتایج جستجو برای: matched case control studies
تعداد نتایج: 3744722 فیلتر نتایج به سال:
An improved technique for matching the asymptotic solutions of non-linear differential equations is presented and successfully applied to the three-dimensional atmospheric skip trajectories. The classical method of matched asymptotic expansions (MAE) is generally applied to two-point-boundary value problems. When we apply the MAE method to initial value problems, due to error propagation, the r...
The authors propose a method to perform a combined analysis of matched and unmatched case-control studies that is based on an adaptation of logistic regression and can be performed using standard software. This methodology can be used to do pooled analyses of studies with different designs. Likelihood ratio tests can be performed to assess association, heterogeneity, or trend. The standard erro...
ôbjective: previous studies reported that individuals with parkinson’s disease are less likely to have smoking history and it seems that nicotine has a neuroprotective effect. the authors have conducted a case-control retrospective study to determine if there is an association between cigarette smoking and parkinson’s disease. methods: ïn a matched case-control study, 92 individuals with parkin...
critical thinking ability has an important role in education. accordingly, scholars around the world are searching for new ways for teaching and improving students critical thinking ability. in line with the studies in efl contexts supporting the positive relationship between critical thinking and writing performances, this study investigated the differential effects of halverson’s critical thi...
Introduction & Objective: Cerebral infarction is a sudden dysfunction of brain tissue secondary to circulatory accidents. There are two types of ischemic and hemorrhagic accidents the former is the most common type. It is the third cause of mortality and morbidity in United States. Many studies have postulated neuroprotective effects for potassium and magnesium. These two elements are also in...
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Background and Objectives: The role of gene-environment interaction in epidemiology has been widely considered. The traditional methods of studying the gene-environment interaction need appropriate control groups which their selection may be associated with some problems. Therefore, new methods have been created to study these interactions from which are the case-only designs. In this method,...
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