Sample size calculations for cluster randomised controlled trials with a fixed number of clusters

<p>Abstract</p> <p>Background</p> <p>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 desi...

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Bibliographic Details
Main Authors: Marsh Jennifer, Sitch Alice J, Girling Alan J, Hemming Karla, Lilford Richard J
Format: Article
Language:English
Published: BMC 2011-06-01
Series:BMC Medical Research Methodology
Online Access:http://www.biomedcentral.com/1471-2288/11/102