Obesity Clinical Trial
Official title:
A Randomized Trial of Financial Incentives for Maintenance of Weight Loss
This study aims to evaluate the effectiveness of financial incentives in improving and maintaining weight loss.
The study will evaluate the effectiveness of financial incentives in improving maintenance of
weight loss. The investigators propose a 2-arm randomized controlled trial in which 258
participants who lose at least 5 kgs in a weight loss program will be randomized to one of
the following: 1) daily weigh-ins and weekly feedback, 2) daily weigh-ins,weekly feedback,
and a weekly escalating lottery-based financial incentive.
Study participants will be obese volunteers recruited from a major community-based weight
loss program (Weight Watchers), who have lost at least 5kg during the 4-6 months prior to
enrolling in the study. Upon enrollment, these participants will have an active online
membership with Weight Watchers. Among these participants, the following will be assessed: 1.
Assess the effectiveness of escalating lottery rewards, relative to the control group, on
maintenance of weight loss over the ensuing 6 months (Phase I); 2.The degree to which weight
loss is maintained in the intervention group relative to usual care during the 6 months
following the cessation of the interventions (Phase II).
During Phase I, incentives will be provided to some study participants (escalating lottery
arm) for the first 6 months and participants will be followed for 6 more months to examine
effects following cessation of incentives.
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