A multicentre cluster-randomized controlled study to evaluate a train-the-trainer programme for implementing internal and external participation in medical rehabilitation.

Objective: Evaluation of the effect of the train-the-trainer programme 'Fit for Shared Decision-Making' on internal (team) and external (patient) participation in medical rehabilitation from a patient and staff perspective.

Design: A multicentre, cluster-randomized controlled study.

Setting: Eleven medical rehabilitation clinics, divided into intervention and control groups.