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

ABSTRACT: BACKGROUND: 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...

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Bibliographic Details
Main Authors: Hemming, Karla, Girling, Alan J, Sitch, Alice J, Marsh, Jennifer, Lilford, Richard J
Format: Artigo
Language:Inglês
Published: BioMed Central 2011
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Online Access:https://ncbi.nlm.nih.gov/pmc/articles/PMC3149598/
https://ncbi.nlm.nih.gov/pubmed/21718530
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/1471-2288-11-102
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