Clinical trial NCT01900392: Financial Incentives for Maintenance of Weight Loss
Official title: A Randomized Trial of Financial Incentives for Maintenance of Weight Loss
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Obesity
Lead sponsor: University of Pennsylvania
Sponsor class: OTHER
Collaborators: name: Duke University
name: National Institute on Aging (NIA)
First posted: 2013-07-16
Enrollment: 191
Sex: ALL
Minimum age (years): 30
Maximum age (years): 80
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: HEALTH_SERVICES_RESEARCH

Brief summary: This study aims to evaluate the effectiveness of financial incentives in improving and maintaining weight loss.

Detailed description: 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. Among these participants, the following will be assessed: 1. The effectiveness of a daily lottery-based financial incentive, relative to the control group, on weight loss and weight maintenance; 2. The effectiveness of a direct payment incentive, relative to the control group, on maintenance of weight loss; 3. Assess the comparative effectiveness of lottery-based and direct payment financial incentives on weight loss and maintenance; 4. The degree to which weight loss is maintained in the intervention groups relative to usual care during the 6 months following cessation of the intervention will also be determined.

During Phase I, incentives will be provided to some study participants (direct payment and lottery arm) for the first 6 months and subjects will be followed for 6 more months to examine effects following cessation of incentives.

Eligibility criteria: Inclusion Criteria:

* Adults age 30-80
* BMI between 30 and 45 prior to starting Weight Watchers
* Have a documented weight loss of at least 5kg in the past 4-6 months before enrolling
* Stable health

Exclusion Criteria:

* Substance abuse
* Bulimia nervosa or related behaviors
* Pregnancy or breast feeding
* Medical contraindications to counseling about diet, physical activity, or weight reduction
* Unstable mental illness
* Screen positive for pathological gambling on the basis of the 10 item DSM-IV criteria (excluded if meets 5 or more criteria)
* Individuals unable to read consent forms or fill out surveys in English

Primary outcomes:
measure: Change in Weight From Baseline to 6 Months
timeFrame: 6 months
measure: Change in Weight From Baseline to 12 Months
timeFrame: 12 months
Secondary outcomes:
Other outcomes:
Locations:
city: Philadelphia
country: United States
facility: University of Pennsylvania
state: Pennsylvania
Study officials:
References:
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