Stepped-Wedge Design

Stepped-wedge designs encompass a broad range of methods, which have gained popularity in recent decades as a means to evaluate interventions that are implemented in a sequential rollout to the target population. The most common approach is for participants to be classified into clusters, which are then randomized (stepped-wedge cluster randomized trial) to determine when the cluster receives the intervention.

As all of the eligible participants in the target population ultimately receive the intervention, the design is appealing from a number of perspectives. Due to logistical, practical, or financial constraints, complex interventions can be very challenging, if not impossible, to commence concurrently to all eligible recipients; therefore, there is a need to deliver the intervention in a phased sequence. Furthermore, such designs do not raise ...

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