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Process Evaluation of a Multifaceted Health Program Aiming to Improve Physical Activity Levels and Dietary Patterns Among Construction Workers

Viester, Laura MSc; Verhagen, Evert A. L. M. PhD; Bongers, Paulien M. Prof; van der Beek, Allard J. Prof

Journal of Occupational and Environmental Medicine: November 2014 - Volume 56 - Issue 11 - p 1210–1217
doi: 10.1097/JOM.0000000000000250
Original Articles

Objective: To evaluate the process of a health promotion program, aiming to improve physical activity levels and diet among construction workers.

Methods: The process evaluation was conducted after 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 and dietary behavior.

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 program was implemented as intended was modest. The intervention was effective on participants’ progress through stages of behavior change.

Conclusions: Based on the RE-AIM dimensions, it is concluded that for construction workers, the program is feasible and potentially effective, but adjustments are required before widespread implementation.

From Body@Work, Research Center for Physical Activity, Work and Health (Mrs Viester, Dr Verhagen, Prof Bongers, and Prof van der Beek), TNO-VU University Medical Center; Department of Public and Occupational Health and the EMGO+ Institute for Health and Care Research (Mrs Viester, Dr Verhagen, and Prof van der Beek), VU University Medical Center, Amsterdam; and TNO Healthy Living (Prof Bongers), Hoofddorp, The Netherlands.

Address correspondence to: Laura Viester, MSc, Department of Public and Occupational Health, The EMGO Institute for Health and Care Research, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands (

This project is part of the research program “Vitality in Practice,” which is financed by Fonds Nuts Ohra (Nuts Ohra Foundation).

The authors declare that they have no conflicts of interests.

L.V. conceived of the study, conducted the data analysis, and drafted the manuscript. E.V., A.B., and P.B. were involved in the design of the study and contributed to the interpretation of the data. All authors contributed to the manuscript by reading and correcting draft versions. All authors read and approved the final manuscript.

Copyright © 2014 by the American College of Occupational and Environmental Medicine