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The impact of varying cluster size in cross-sectional stepped-wedge cluster randomised trials

BACKGROUND: Cluster randomised trials with unequal sized clusters often have lower precision than with clusters of equal size. To allow for this, sample sizes are inflated by a modified version of the design effect for clustering. These inflation factors are valid under the assumption that randomisa...

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Detalles Bibliográficos
Autores principales:	Martin, James Thomas, Hemming, Karla, Girling, Alan
Formato:	Online Artículo Texto
Lenguaje:	English
Publicado:	BioMed Central 2019
Materias:	Research Article
Acceso en línea:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6570871/ https://www.ncbi.nlm.nih.gov/pubmed/31200640 http://dx.doi.org/10.1186/s12874-019-0760-6

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