Donner A
Department of Epidemiology and Biostatistics, University of Western Ontario, London, Canada.
Stat Med. 1992 Apr;11(6):743-50. doi: 10.1002/sim.4780110605.
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.
