Abstract:Cluster-randomized trials (CRTs) involve randomizing entire groups of participants to treatment arms, but are often comprised of a limited number of available clusters. While covariate adjustment can account for chance imbalances between treatment arms and increase statistical efficiency in individually-randomized trials, analytical methods for covariate adjustment in small CRTs have received little attention to date. In this paper, we systematically investigate, through extensive simulations, the operating ch… Show more
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