Matching in case-control studies
نویسندگان
چکیده
منابع مشابه
Flexible matching in case-control studies of gene-environment interactions.
Because of the lack of power of case-control study designs to detect gene-environment interactions, flexible matching has recently been proposed as a method of improving efficiency. In this paper, the authors consider a large-sample approximation method that allows estimation of the most efficient matching strategy when genotype and exposure are either independent or associated. The authors pro...
متن کاملNested case-control studies: should one break the matching?
In a nested case-control study, controls are selected for each case from the individuals who are at risk at the time at which the case occurs. We say that the controls are matched on study time. To adjust for possible confounding, it is common to match on other variables as well. The standard analysis of nested case-control data is based on a partial likelihood which compares the covariates of ...
متن کاملCase-Control Studies, Inference in
Classic (or ‘‘cumulative’’) case-control sampling designs do not admit inferences about quantities of interest other than risk ratios and then only by making the rare events assumption. Probabilities, risk differences, number needed to treat, and other quantities cannot be computed without knowledge of the population incidence fraction. Similarly, density (or ‘‘risk set’’) case-control sampling...
متن کاملConfounding in case control studies
I read with interest the article on computerized tests to evaluate psychomotor performance in children with specific learning disabilities (SpLD) by taur and colleagues1. the study was conducted with the aim to compare the performance on a battery of six psychomotor tests of children with SpLD and those without any learning disabilities (controls) using computerized tests. the authors deserve c...
متن کاملSecondary matching: a method for selecting controls in case-control studies on environmental risk factors.
BACKGROUND The problem of control selection was considered in a population-based case-control study on pleural mesothelioma in Spain. Random sampling from the population was discarded because of potential selection bias due to low participation. Selection of hospital controls by matching them to cases by hospital seemed unsuitable for investigating environmental exposures, as the choice of hosp...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: BMJ
سال: 1995
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.310.6975.329d