SWPERMUTE: Stata module to compute Permutation tests for Stepped-Wedge Cluster-Randomised Trials

Permutation tests are useful in stepped-wedge trials to provide robust statistical tests of intervention-effect estimates. However, the Stata command permute does not produce valid tests in this setting because individual observations are not exchangeable. We introduce the swpermute command that permutes clusters to sequences to maintain exchangeability. The command provides additional functionality to aid users in performing analyses of stepped-wedge trials. In particular, we include the option “withinperiod" that performs the specified analysis separately in each period of the study and the resulting period-specific intervention-effect estimates are combined as a weighted average.

Additional Information

Handle: RePEc:boc:bocode:s458426

Keywords

Stepped-wedge trial, Permutation tests, Cluster randomised trial, Stata