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Fig. 3 | Trials

Fig. 3

From: Understanding the cluster randomised crossover design: a graphical illustration of the components of variation and a sample size tutorial

Fig. 3

A single cluster in the cluster randomised crossover (CRXO) design where (a) ρ > η, η > 0. b η → ρ. c η → 0. The green solid vertical lines indicate difference between true intensive care unit (ICU) mean length of stay (LOS) and true cluster-period mean LOS. The yellow (blue) curve indicates a normal distribution of patient LOS within each cluster or cluster-period where the patient or cluster was allocated to intervention S (T). The true difference between intervention S and T is zero. The total variance in LOS remains constant

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Trials

ISSN: 1745-6215