Sample size requirements for stratified cluster randomization designs.
作者信息
Donner A
机构信息
Department of Epidemiology and Biostatistics, University of Western Ontario, London, Canada.
出版信息
Stat Med. 1992 Apr;11(6):743-50. doi: 10.1002/sim.4780110605.
PMID:1594813
Abstract
Sample size requirements are provided for designs of studies in which clusters are randomized within each of several strata, where cluster size itself may be a stratifying factor. The approach generalizes a formula derived by Woolson et al., which provides sample size requirements for the Cochran-Mantel-Haenszel statistic. Issues of data analysis are also discussed.
摘要
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