Effectiveness of a Worksite Intervention for Male Construction Workers on Dietary and Physical Activity Behaviors, Body Mass Index, and Health Outcomes: Results of a Randomized Controlled Trial.
PURPOSE
To evaluate the effectiveness of an individually tailored intervention for improvement in lifestyle behavior, health indicators, and prevention and reduction of overweight among construction workers.


DESIGN
Randomized controlled trial.


SETTING
Various blue-collar departments of a large construction company in the Netherlands.


PARTICIPANTS
Blue-collar workers randomized to an intervention (n = 162) or a control group (n = 152).


INTERVENTION
The intervention group received individual coaching sessions, tailored information, and materials to improve lifestyle behavior during a 6-month period, and the control group received usual care.


MEASURES
Body weight, body mass index (BMI), waist circumference, physical activity (PA) levels, dietary behavior, blood pressure, and blood cholesterol were assessed.


ANALYSIS
Effectiveness of the intervention on outcome measures at 6- and 12-month follow-up was assessed by using linear and logistic regression models adjusting for baseline levels.


RESULTS
After 6 months, a statistically significant intervention effect was found on body weight ( B = -1.06, P = .010), BMI ( B = -0.32, P = .010), and waist circumference ( B = -1.38, P = .032). At 6 months, the percentage of those meeting public health guidelines for PA increased significantly in the intervention group compared to the control group ( B = 2.06, P = .032), and for sugar-sweetened beverages, an intervention effect was found at 6 months as well ( B = -2.82, P = .003). At 12 months, for weight-related outcomes, these differences were slightly smaller and no longer statistically significant. The intervention was not effective on the total amount of moderate to vigorous PA and other dietary and health outcomes.


CONCLUSION
Intervention participants showed positive changes in vigorous PA and intake of sugar-sweetened beverages compared to controls, as well as effects on weight-related outcomes at 6 months. Long-term effects were still promising but not statistically significant.
['Viester|Laura|L|', 'Verhagen|Evert A L M|EALM|', 'Bongers|Paulien M|PM|', 'van der Beek|Allard J|AJ|']
D000328:Adult D001794:Blood Pressure D015992:Body Mass Index D001837:Body Weights and Measures D002784:Cholesterol D060389:Construction Industry D004032:Diet D015444:Exercise D006293:Health Promotion D006801:Humans D008019:Life Style D008297:Male D008875:Middle Aged D009426:Netherlands D016272:Occupational Health D017132:Workplace
construction workers physical activity dietary behavior health promotion weight control