ABSTRACT
OBJECTIVE: Evaluate innovative, evidence-based approaches to organizational/supportive environmental interventions aimed at reducing the prevalence of obesity among Dow employees after 2 years of implementation. METHODS: A quasi-experimental study design compared outcomes for two levels of intervention intensity with a control group. Propensity scores were used to weight baseline differences between intervention and control subjects. Difference-in-differences methods and multilevel modeling were used to control for individual and site-level confounders. RESULTS: Intervention participants maintained their weight and body mass index, whereas control participants gained 1.3 pounds and increased their body mass index values by 0.2 over 2 years. Significant differences in blood pressure and cholesterol values were observed when comparing intervention employees with controls. At higher intensity sites, improvements were more pronounced. CONCLUSIONS: Environmental interventions at the workplace can support weight management and risk reduction after 2 years.
Subject(s)
Obesity/prevention & control , Occupational Health Services , Risk Reduction Behavior , Adult , Body Mass Index , Case-Control Studies , Chemical Industry , Female , Follow-Up Studies , Humans , Male , Middle Aged , Weight LossABSTRACT
OBJECTIVE: To examine first-year results from a workplace environmental obesity prevention program at The Dow Chemical Company. METHODS: A quasi-experimental cohort study was conducted among employees at nine treatment worksites (n = 8013) who received environmental weight management interventions and three control worksites (n = 2269). Changes in employees' weight, body mass index (BMI), and other health risks were examined using chi2 and t-tests. RESULTS: After 1 year, a modest treatment effect was observed for weight and BMI largely because the control group subjects gained weight; however, no effect was observed for overweight and obesity prevalence. Other risk factors (tobacco use, high blood pressure, and systolic and diastolic blood pressure values) decreased significantly, although blood glucose (high risk prevalence and values) increased. CONCLUSIONS: Environmental changes to the workplace can achieve modest improvements in employees' health risks, including weight and BMI measures, in 1 year.
