Dear Allstat,
I wish to calculate the sample size required for a cluster randomised
trial. I need to calculate the intra-cluster correlation coefficient
using existing data on proportions measured in 55 clusters. I would
greatly appreciate advice on how to calculate the coefficient when the
data take the form of proportions.
Thanks, Carol Coupland
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Carol Coupland
Division of Public Health Medicine and Epidemiology
School of Community Health Sciences
University of Nottingham Medical School
Nottingham NG7 2UH.
Tel: 0115 9709311
e-mail [log in to unmask]
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