Figure 1

Flow diagram describing the progress of participants through the phases of the trial. PT refers to physical training without a cognitive behavioral component and workplace specific exercises. PTCBWE refers to physical training with a cognitive behavioral component and workplace specific exercises. This figure presents the flow of (non-)participants from the inclusion period of the study till the end of follow-up. The number of participants included in each arm of the trial is the key information of this figure. Moreover, also information about exclusion of workers is given. Finally, this figure informs about the reasons why participants were not compliant to their treatment allocation.