Sampling strategies in nested case-control studies.
نویسندگان
چکیده
منابع مشابه
Sampling strategies in nested case-control studies.
A stratified version of nested case-control sampling which we call "countermatching" is presented. This design uses data available for all cohort members to obtain a sample for collecting additional information in a case-control substudy. Hitherto the only stratified sampling design for such studies has involved matching of controls to cases with respect to confounding variables. However, in so...
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BACKGROUND The nested case-control design can be a very efficient approach to an epidemiological investigation. In order to obtain unbiased estimates of relative risk, controls should be selected by incidence density sampling, which involves matching each case to a sample of those who are at risk at the time of case occurrence. METHODS This paper presents a simple computer program for inciden...
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ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 1994
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.94102s847