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Fig. 6 | BMC Medical Research Methodology

Fig. 6

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

Fig. 6

The impact of imbalance of observations between control and intervention condition on the precision of a stepped-wedge cluster randomised trial. CMC: Cluster mean correlation. The balance statistic was calculated as: (number of observation in intervention condition – number of observation in control condition)2. A larger value of the balance statistic indicates greater imbalance. Each point is the balance statistic and power for a particular set of simulated cluster sizes. The default values for the design characteristics are: number of clusters: 12; CV: 1.5

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