Chapter 4 Process evaluation of a multifaceted health programme aiming ot improve physical levels and dietary patterns among construction workers

Objective: To evaluate the process of a health promotion programme, aiming to improve physical activity levels and diet among construction workers. Methods: The process evaluation was conducted following the RE-AIM framework for the evaluation of the public health impact of health promotion interventions. Effectiveness was assessed on motivational stage-of-change, self-efficacy and decisional balance for physical activity as well as dietary behaviour. Results: The external validity of the trial was satisfactory with representative reach of workers and adoption of workplace units in the participating construction company. The extent to which the programme was implemented as intended was modest. The intervention was effective on participants' progress through stages of behaviour change. Conclusions: Based on the RE-AIM dimensions it is concluded that for construction workers the programme is feasible and potentially effective, but adjustments are required before widespread implementation.