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Sample size requirements for stratified cluster randomization designs
Author(s) -
Donner Allan
Publication year - 1992
Publication title -
statistics in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.996
H-Index - 183
eISSN - 1097-0258
pISSN - 0277-6715
DOI - 10.1002/sim.4780110605
Subject(s) - sample size determination , statistics , statistic , cluster (spacecraft) , sample (material) , computer science , randomization , mathematics , econometrics , data mining , randomized controlled trial , medicine , chemistry , surgery , chromatography , programming language
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.