Choosing an imbalance metric for covariate-constrained randomization in multiple-arm cluster-randomized trials
Choosing an imbalance metric for covariate-constrained randomization in multiple-arm cluster-randomized trials
In cluster-randomized controlled trials (C-RCTs), covariate-constrained randomization (CCR) methods efficiently control imbalance in multiple baseline cluster-level variables, but the choice of imbalance metric to define the subset of "adequately balanced" possible allocation schemes for C-RCTs involving more than two arms and continuous variables is unclear. In an ongoing three-armed C-RCT, …