Clinical trial NCT00708461: Environmental Intervention for Weight Gain Prevention
Official title: Environmental Intervention for Weight Gain Prevention
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Obesity
Keywords: obesity
obesity prevention
worksite
environment
intervention
Lead sponsor: University of Minnesota
Sponsor class: OTHER
Collaborators: name: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
First posted: 2008-07-02
Enrollment: 1747
Sex: ALL
Minimum age (years): 18
Maximum age (years): 70
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: 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: 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.

Eligibility criteria: 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

Primary outcomes:
measure: Change in Body Mass Index (BMI)
timeFrame: Baseline to 24 months
Secondary outcomes:
Other outcomes:
Locations:
city: Minneapolis
country: United States
facility: University of Minnesota
state: Minnesota
Study officials:
affiliation: University of Minnesota, Division of Epidemiology and Community Health
name: Robert W Jeffery, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: VanWormer JJ, Linde JA, Harnack LJ, Stovitz SD, Jeffery RW. Weight change and workplace absenteeism in the HealthWorks study. Obes Facts. 2012;5(5):745-52. doi: 10.1159/000345119. Epub 2012 Oct 24.
citation: Linde JA, Nygaard KE, MacLehose RF, Mitchell NR, Harnack LJ, Cousins JM, Graham DJ, Jeffery RW. HealthWorks: results of a multi-component group-randomized worksite environmental intervention trial for weight gain prevention. Int J Behav Nutr Phys Act. 2012 Feb 16;9:14. doi: 10.1186/1479-5868-9-14.
citation: VanWormer JJ, Linde JA, Harnack LJ, Stovitz SD, Jeffery RW. Is baseline physical activity a determinant of participation in worksite walking clubs? Data from the HealthWorks Trial. J Phys Act Health. 2012 Aug;9(6):849-56. doi: 10.1123/jpah.9.6.849. Epub 2011 Jul 29.
citation: VanWormer JJ, Linde JA, Harnack LJ, Stovitz SD, Jeffery RW. Self-weighing frequency is associated with weight gain prevention over 2 years among working adults. Int J Behav Med. 2012 Sep;19(3):351-8. doi: 10.1007/s12529-011-9178-1.
citation: Graham DJ, Linde JA, Cousins JM, Jeffery RW. Environmental modifications and 2-year measured and self-reported stair-use: a worksite randomized trial. J Prim Prev. 2013 Dec;34(6):413-22. doi: 10.1007/s10935-013-0323-2.