Study design
This study was part of a project to evaluate the occupational health management system of a large, global, private-sector company in Germany from December 2020 to June 2022. The company’s employees received information about the aims of the study and the scope of the evaluation project orally, by email or from brochures. The participants of the WHPP were asked to complete the survey on paper at the start and after completion of the intervention, as well as online at follow-up measurements six and 18 months after the intervention. Identification of the participants across the four measurement times was achieved by means of an individual pseudonym, which was presented before completing the questionnaires.The participants of this study were asked to provide their informed consent at the start of the intervention and before completing the online version of the survey at the follow-up stages. This study complied with the company’s data privacy guidelines. The Ethics Committee of the School of Medicine at the Technical University of Munich gave its ethical approval for this study (IRB number: 645/20 S-KH). The study was registered in the German Clinical Trials Register (DRKS00030514).