Sample size requirements for stratified cluster randomization designs.
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.
Donner
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Department of Epidemiology and Biostatistics, University of Western Ontario, London, Canada.
D016000:Cluster Analysis; D006801:Humans; D016555:Matched-Pair Analysis; D016016:Proportional Hazards Models; D016032:Randomized Controlled Trials as Topic / Q000592:standards*; D012107:Research Design / Q000592:standards*; D012494:Sampling Studies