Sample size calculations for cluster randomised controlled trials with a fixed number of clusters
Abstract
Cluster randomised controlled trials (CRCTs) are frequently used in health service evaluation. Assuming an average cluster size, required sample sizes are readily computed for both binary and continuous outcomes, by estimating a design effect or inflation factor. However, where the number of clusters are fixed in advance, but where it is possible to increase the number of individuals within each cluster, as is frequently the case in health...
Paper Details
Title
Sample size calculations for cluster randomised controlled trials with a fixed number of clusters
Published Date
Jun 30, 2011
Volume
11
Issue
1
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