title: Second-year results of an obesity prevention program at the Dow Chemical Company.
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.
authors.affiliation: Institute for Health and Productivity Studies, Rollins School of Public Health, Emory University, Atlanta, GA, USA. ron.goetzel@thomsonreuters.com
authors.forename: Ron Z
authors.initials: RZ
authors.lastname: Goetzel
authors.forename: Enid C
authors.initials: EC
authors.lastname: Roemer
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Pei
authors.forename: Meghan E
authors.initials: ME
authors.lastname: Short
authors.forename: Maryam J
authors.initials: MJ
authors.lastname: Tabrizi
authors.forename: Mark G
authors.initials: MG
authors.lastname: Wilson
authors.forename: David M
authors.initials: DM
authors.lastname: Dejoy
authors.forename: Beth A
authors.initials: BA
authors.lastname: Craun
authors.forename: Karen J
authors.initials: KJ
authors.lastname: Tully
authors.forename: John M
authors.initials: JM
authors.lastname: White
authors.forename: Catherine M
authors.initials: CM
authors.lastname: Baase
mesh_terms: D000328:Adult; D015992:Body Mass Index; D016022:Case-Control Studies; D002617:Chemical Industry; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000517:prevention & control*; D009786:Occupational Health Services; D040242:Risk Reduction Behavior; D015431:Weight Loss