Power and sample size in clinical studies
نویسندگان
چکیده
منابع مشابه
Sample size estimation and power analysis for clinical research studies
Determining the optimal sample size for a study assures an adequate power to detect statistical significance. Hence, it is a critical step in the design of a planned research protocol. Using too many participants in a study is expensive and exposes more number of subjects to procedure. Similarly, if study is underpowered, it will be statistically inconclusive and may make the whole protocol a f...
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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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ژورنال
عنوان ژورنال: Journal of Nuclear Cardiology
سال: 2015
ISSN: 1071-3581,1532-6551
DOI: 10.1007/s12350-015-0288-z