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Effectiveness of a worksite-based weight loss randomized controlled trial: the worksite study
Almeida FA, You W, Harden SM, Blackman KCA, Davy BM, Glasgow RE, Hill JL, Linnan LA, Wall SS, Yenerall J, Zoellner JM, Estabrooks PA
Obesity 2015 Apr;23(4):737-745
clinical trial
6/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: Yes; Intention-to-treat analysis: Yes; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

OBJECTIVE: To determine the effectiveness of an individually targeted internet-based intervention with monetary incentives (INCENT) at reducing weight of overweight and obese employees when compared with a less-intensive intervention (Livin' My Weigh (LMW)) 6 months after program initiation. METHODS: Twenty-eight worksites were randomly assigned to either INCENT or LMW conditions. Both programs used evidence-based strategies to support weight loss. INCENT was delivered via daily e-mails over 12 months while LMW was delivered quarterly via both newsletters and on-site educational sessions. Generalized linear mixed models were conducted for weight change from baseline to 6 months post-program and using an intention-to-treat analysis to include all participants with baseline weight measurements. RESULTS: Across 28 worksites, 1,790 employees (mean 47 years of age; 79% caucasian; 74% women) participated. Participants lost an average of 2.27 lbs (p < 0.001) with a BMI decrease of 0.36 kg/m2 (p < 0.001) and 1.30 lbs (p < 0.01) with a BMI decrease of 0.20 kg/m2 (p < 0.01) in INCENT and LMW, respectively. The differences between INCENT and LMW in weight loss and BMI reduction were not statistically significant. CONCLUSIONS: This study suggests that INCENT and a minimal intervention alternative may be effective approaches to help decrease the overall obesity burden within worksites.

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