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Worksite Program to Prevent Weight Gain Among Bus Drivers

This study has been completed.
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI) Identifier:
First received: July 20, 2005
Last updated: July 28, 2008
Last verified: July 2008

The purpose of this study is to implement and evaluate a two-year multi-component environmental intervention to prevent weight gain among city bus drivers at four bus garages.

It is hypothesized that transit employees in the intervention garages will gain less weight compared to the transit employees in the control garages.

Condition Intervention
Cardiovascular Diseases
Heart Diseases
Behavioral: Healthful eating and food choices behavior change programs and changes in worksite food availability and prices
Behavioral: Physical Activity
Behavioral: Environment

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Open Label
Primary Purpose: Prevention
Official Title: Worksite Environmental Interventions for Weight Control

Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Primary Outcome Measures:
  • Change in body weight [ Time Frame: Measured at Year 2 ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Changes in energy intake and physical activity [ Time Frame: Measured at Year 2 ] [ Designated as safety issue: No ]
  • Health claims cost [ Time Frame: Measured at Year 2 ] [ Designated as safety issue: No ]

Estimated Enrollment: 1200
Study Start Date: September 2004
Study Completion Date: April 2008
Primary Completion Date: December 2007 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
Multi-component environmental intervention to prevent excess weight gain among bus drivers
Behavioral: Healthful eating and food choices behavior change programs and changes in worksite food availability and prices
Food choices and eating behavior programs and environmental changes will be implemented for 18 months in intervention garages.
Behavioral: Physical Activity
Physical activity programs are offered at the intervention garages for an 18 month period.
Behavioral: Environment
Changes in the food and physical activity environment are made for an 18 month period in intervention garages. These include improving the healthfulness of the foods available in vending machines, and improving the fitness rooms at the garages.
No Intervention: 2
Control group

Detailed Description:


Environmental influences that support less healthful food choices and sedentary behaviors have contributed to the epidemic increase in overweight and obesity among U.S. adults. Worksite settings are an effective channel through which to reach adults with interventions designed to prevent excess weight gain and obesity.


This study will implement and evaluate a multi-component environmental intervention to prevent excess weight gain among 1200 bus drivers working in four garages in a major metropolitan area. Four garages will be randomized to the intervention or control group for a two-year period. The environmental interventions are based on a social ecological framework and target four worksite environmental areas: 1) food availability and incentives; 2) physical activity opportunities and incentives; 3) the social environment; and 4) media/promotion related to health food choices, physical activity, and body weight.


Ages Eligible for Study:   18 Years to 70 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Employed as a bus driver

Exclusion criteria:

  • Not employed as a bus operator at one of the four participating garages
  Contacts and Locations
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Please refer to this study by its identifier: NCT00122993

United States, Minnesota
University of Minnesota
Minneapolis, Minnesota, United States, 55454
Sponsors and Collaborators
Principal Investigator: Simone French University of Minnesota - Clinical and Translational Science Institute
  More Information

No publications provided

Responsible Party: Simone A. French, University of Minnesota Identifier: NCT00122993     History of Changes
Other Study ID Numbers: 222, R01 HL079478
Study First Received: July 20, 2005
Last Updated: July 28, 2008
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Cardiovascular Diseases
Heart Diseases processed this record on November 25, 2014