Fig. 1From: Choosing an imbalance metric for covariate-constrained randomization in multiple-arm cluster-randomized trialsDistribution of site-level randomization variables by arm for trial NCT02979444. We planned for a total of 42 randomized sites (6:18:18), but owing to dropout we have 38 active sites. Sample size and power considerations accounted for dropout that we observed. Medians (interquartile ranges) are displayed in each arm for each variable aboveBack to article page