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Life sciences · Interventional Study
ClinicalTrials.gov · October 28, 2026
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Interventional Study.
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Registry record from ClinicalTrials.gov (NCT02105571). This is a study registration, not published results. Lead sponsor: Oregon Health and Science University. Recruitment status: COMPLETED. Phase: NA. Study type: INTERVENTIONAL. Enrollment: 452 participants (ACTUAL). Conditions: Obesity. Interventions: BEHAVIORAL: Intervention. Primary outcome measures: Change From Baseline in Body Weight (lb) at 6 Months , Baseline, 6 months; Change From Baseline in Body Weight (lb) at 18 Months , Baseline, 18 months; Change From Baseline in Body Mass Index at 6 Months , Baseline, 6 Months; Change From Baseline in Body Mass Index at 18 Months , Baseline, 18 Months; Change From Baseline in Daily Fruit or Vegetable Servings at 6 Months , Baseline, 6 Months; Change From Baseline in Daily Fruit or Vegetable Servings at 18 Months , Baseline, 18 Months; Change From Baseline in Percent Energy From Fat at 6 Months , Baseline, 6 Months; Change From Baseline in Percent Energy From Fat at 18 Months , Baseline, 18 Months; Change From Baseline in Sugary Snack Consumption at 6 Months , Baseline, 6 Months; Change From Baseline in Sugary Snack Consumption at 18 Months , Baseline, 18 Months; Change From Baseline in Sugary Drink Consumption at 6 Months , Baseline, 6 Months; Change From Baseline in Sugary Drink Consumption at 18 Months , Baseline, 18 Months; Change From Baseline in Fast Food Consumption at 6 Months , Baseline, 6 months; Change From Baseline in Fast Food Consumption at 18 Months , Baseline, 18 months; Change From Baseline in Physical Activity at 6 Months , Baseline, 6 months; Change From Baseline in Physical Activity at 18 Months , Baseline, 18 months. Brief summary: The current project is a randomized, controlled evaluation of a new weight loss and health promotion intervention for truck drivers. The intervention is a 6-month weight loss competition supported with computer based training, behavioral self-monitoring, and motivational interviewing. We hypothesize that the intervention will produce greater change than a usual practices control condition. Our secondary hypothesis is that social support and stress in home and work environments will moderate intervention efficacy.