Leading for change: line managers’ influence on the outcomes of an occupational health intervention

Line managers may play a central role in the success of occupational health interventions. However, few studies have focussed on the relationship between line managers’ behaviours and the outcomes of occupational health interventions. We examined the influence of both line managers’ attitudes and actions towards an intervention as well as their transformational leadership on the expected outcomes of the intervention (i.e. employee self-rated health and work ability). The intervention consisted of the implementation and use of a web-based system for occupational health management. A sample of 180 employees provided data for the analysis. Self-rated health and work ability were measured at the baseline (Time 1) and follow-up (Time 3), while employee ratings of line managers’ attitudes and actions, and transformational leadership were measured during the intervention process (Time 2). The results revealed that line managers’ attitudes and actions positively predicted changes in both self-rated health and work ability. The influence of transformational leadership was indirect and mediated through line managers’ attitudes and actions towards the intervention. Based on the results, we suggest using process measures that include aspects of both line managers’ attitudes and actions as well as their transformational leadership in future process evaluation.