. Limitations and methodological implications Several factors could have influenced the outcome of the study. For instance, the situation of the workplace and changes concerning organization and management might have influenced the employees during the duration of the interventions. How the intervention was conducted and by whom might have affected the results, particularly if the relation between the facilitator and the to affect the outcome of the intervention. Because it is a study with only one case of each intervention method and in some cases few employees, there was a need for uniform results to reach statistical significance.