Environmental Intervention for Weight Gain Prevention

Study Overview
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Brief Summary
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The primary aim of this research is to evaluate the efficacy of a multicomponent worksite-based, environmental intervention in reducing weight increase and obesity over time in working adults.

Detailed Description
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This study is a randomized trial designed to evaluate the effectiveness of a multi-component worksite intervention with strong environmental components to prevent weight gain. Six worksites will be randomized to either an intervention or a no-treatment control group. The intervention will be comprised of 1) changing the availability, portion sizes, and prices of foods and beverages sold to employees in their worksites in ways that encourage healthier food choices; 2) increasing the availability of physical activity opportunities at the worksite by implementing walking programs and increasing stairwell access and attractiveness; 3) placing scales in the work environment to encourage body weight monitoring and to enable workers to set goals for their weight; and 4) to provide educational materials to all employees to make them aware of the environmental intervention and of behavioral practices likely to be effective in preventing weight gain. The intervention will be implemented for a 2-year period in each intervention site. Effectiveness will be evaluated by assessing body weight, eating behavior and physical activity in a cohort of employees in both control and intervention sites at baseline and again 2 years later. Weight trends in these populations will also be compared to data from national and state-level annual surveys of weight in representative population samples. Data will be collected on the effects of specific intervention components via aggregate measures of food choice and physical activity.

Official Title
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Environmental Intervention for Weight Gain Prevention

Conditions
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Obesity

Intervention / Treatment
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* Behavioral: weight gain prevention


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: age 18 or older generally in good health part- or full-time employee in one of the participating worksites Exclusion Criteria: work on site <50% of the time work second or third shift

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Worksite Environmental Intervention<br>Changes to healthy food availability, physical activity opportunities and promotion, body weight scale access, and media enhancements to target weight gain prevention | Behavioral: weight gain prevention<br>* Changes in the food environment that increase the availability of healthy foods and beverages, reduce food and beverage portion sizes, reduce prices on healthy food items, and increase prices on less healthy food items. Changes in the activity environment that increase cues and incentives for walking at work and at home, using stairs, and to increase exposure of employees to information about active recreational opportunities at work and at home. Changes to the environment to increase cues and incentives for regular weight monitoring by providing scales at convenient locations. Changes in the informational environment that increase frequency of exposure of the employee population to accurate information about healthy food and activity choices.<br>* Other names: obesity prevention;|
| No Intervention: No-contact control<br>No-treatment control condition. Worksites were offered program materials upon completion of programs at intervention sites. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Body Mass Index (BMI) | Assessed in kilograms per meter squared. | Baseline to 24 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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obesity, obesity prevention, worksite, environment, intervention