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A priori postulated and real power in cluster randomized trials: mind the gap

BACKGROUND: Cluster randomization design is increasingly used for the evaluation of health-care, screening or educational interventions. The intraclass correlation coefficient (ICC) defines the clustering effect and be specified during planning. The aim of this work is to study the influence of the...

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Hlavní autoři: Guittet, Lydia, Giraudeau, Bruno, Ravaud, Philippe
Médium: Artigo
Jazyk:Inglês
Vydáno: BioMed Central 2005
Témata:
On-line přístup:https://ncbi.nlm.nih.gov/pmc/articles/PMC1190183/
https://ncbi.nlm.nih.gov/pubmed/16109162
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/1471-2288-5-25
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