Explaining the variation in the attained power of a stepped-wedge trial with unequal cluster sizes

BACKGROUND: In a cross-sectional stepped-wedge trial with unequal cluster sizes, attained power in the trial depends on the realized allocation of the clusters. This attained power may differ from the expected power calculated using standard formulae by averaging the attained powers over all allocat...

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Veröffentlicht in:BMC Med Res Methodol
Hauptverfasser: Ouyang, Yongdong, Karim, Mohammad Ehsanul, Gustafson, Paul, Field, Thalia S., Wong, Hubert
Format: Artigo
Sprache:Inglês
Veröffentlicht: BioMed Central 2020
Schlagworte:
Research Article
Online Zugang:https://ncbi.nlm.nih.gov/pmc/articles/PMC7315519/
https://ncbi.nlm.nih.gov/pubmed/32580698
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/s12874-020-01036-5
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