Process Evaluation of the Nationwide Implementation of a Lifestyle Intervention in the Construction Industry.

OBJECTIVE The aim of this study was to monitor the national scale up of the effective lifestyle intervention Health Under Construction in the Dutch construction industry. METHODS Data were collected on seven process indicators, ie, reach, dose delivered, dose received, fidelity, competence, satisfaction, and barriers. RESULTS The intervention reached 2.4% of the target group. Thirty-eight percent of the participants received five to seven consultations and 41% discussed all six intervention components. None of the counselors attained motivational interviewing proficiency. Participants perceived their counselor as competent and were satisfied with the intervention. Counselors were moderately satisfied with the intervention and experienced various barriers. CONCLUSIONS Even though important conditions for scale up were met, the implementation was characterized by a low reach, a high drop-out rate, and a low quality of the counseling technique.