Two-Stage Sampling for Etiologic Studies: Sample Size and Power
نویسندگان
چکیده
منابع مشابه
Two-stage sampling for etiologic studies. Sample size and power.
Preexisting computerized databases are potentially valuable sources of epidemiologic data. Since such databases are infrequently created specifically for etiologic research, data may be available for the exposure of interest and, through record linkage, for the endpoint of interest, but lacking for potential confounders. Because of the size of these databases, two-stage sampling is an efficient...
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Background and purpose: Sample size and its determination is one of the most important problems in health researches. Calculating sample size for prevalence studies is one of the common questions of sample size topics. Minimum sample size with least complexity is desirable in order to achieve the basic goal of these studies. This study aims to compare two formulas of sample size calculation for...
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background and purpose: sample size and its determination is one of the most important problems in health researches. calculating sample size for prevalence studies is one of the common questions of sample size topics. minimum sample size with least complexity is desirable in order to achieve the basic goal of these studies. this study aims to compare two formulas of sample size calculation for...
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ژورنال
عنوان ژورنال: American Journal of Epidemiology
سال: 1997
ISSN: 0002-9262,1476-6256
DOI: 10.1093/oxfordjournals.aje.a009298