Reposted by Anders Granholm
Estimating effective sample sizes using standard errors from appropriate analyses of cluster-randomised trials - Journal of Clinical Epidemiology www.jclinepi.com/article/S089...
jclinepi.com
Estimating effective sample sizes using standard errors from appropriate analyses of cluster-randomised trials
Cluster-randomised trials (CRTs) typically provide less information than similarly
sized trials with individual randomisation due to correlation within clusters, i.e.,
the effective sample size (ESS) ...