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Financial Incentives for Maintenance of Weight Loss

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ClinicalTrials.gov Identifier: NCT01900392
Recruitment Status : Completed
First Posted : July 16, 2013
Results First Posted : September 27, 2018
Last Update Posted : September 27, 2018
Sponsor:
Collaborators:
Duke University
National Institute on Aging (NIA)
Information provided by (Responsible Party):
University of Pennsylvania

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

Condition or disease Intervention/treatment Phase
Obesity Behavioral: Financial incentive Not Applicable

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.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 191 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Investigator)
Primary Purpose: Health Services Research
Official Title: A Randomized Trial of Financial Incentives for Maintenance of Weight Loss
Study Start Date : September 2013
Actual Primary Completion Date : August 2015
Actual Study Completion Date : February 2016

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
No Intervention: Control Arm
No other financial incentive other than for the 3-, 6-, 9-, & 12-month weigh-ins and surveys. Participants will receive daily feedback for months 1-6 and will be observed without intervention in Phase II (months 7-12). Two weigh-ins will be required during Phase II, one at 9 months and the other at 12 months.
Experimental: Direct payment

In addition to the incentives for the 3-, 6-, 9-, & 12-month weigh-ins, participants who meet their daily goal will be eligible to receive an incentive for each day their goal is met during the first 6 months of the study. All daily incentive earnings will be paid out after verifying participants' weights during an in person weigh in at a Weight Watchers location at months 3 and 6. Winnings will be proportional to weight loss. For example, if a participant's goal was to lose 6 pounds by month 3, but he/she only lost 3 pounds, that participant would only receive 50% of their total eligible winnings.

Similar to the control arm, participants will receive daily feedback for months 1-6 and will be observed without intervention in Phase II (months 7-12). The weigh-ins at 9- and 12-months will also be required.

Behavioral: Financial incentive
Participants in the direct payment and lottery arms will receive financial incentives as part of the intervention. See arm descriptions for more detail.

Experimental: Lottery

In addition to the incentives for the 3-, 6-, 9-, & 12-month weigh-ins, participants who meet their daily goal will be eligible for the daily lottery during the first 6 months of the study. The expected daily winning for the lottery is the same as for the direct payment arm. All daily incentive earnings will be paid out after verifying participants' weights during an in person weigh in at a Weight Watchers location at months 3 and 6. Winnings will be proportional to weight loss. For example, if a participant's goal was to lose 6 pounds by month 3, but he/she only lost 3 pounds, that participant would only receive 50% of their total eligible winnings.

Similar to the control arm, participants will receive daily feedback for months 1-6 and will be observed without intervention in Phase II (months 7-12). The weigh-ins at 9- and 12-months will also be required.

Behavioral: Financial incentive
Participants in the direct payment and lottery arms will receive financial incentives as part of the intervention. See arm descriptions for more detail.




Primary Outcome Measures :
  1. Change in Weight From Baseline to 6 Months [ Time Frame: 6 months ]
  2. Change in Weight From Baseline to 12 Months [ Time Frame: 12 months ]


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Ages Eligible for Study:   30 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
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

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01900392


Locations
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United States, Pennsylvania
University of Pennsylvania
Philadelphia, Pennsylvania, United States, 19104
Sponsors and Collaborators
University of Pennsylvania
Duke University
National Institute on Aging (NIA)
Publications:

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
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Responsible Party: University of Pennsylvania
ClinicalTrials.gov Identifier: NCT01900392    
Other Study ID Numbers: 816917
1R01AG045045-01 ( U.S. NIH Grant/Contract )
First Posted: July 16, 2013    Key Record Dates
Results First Posted: September 27, 2018
Last Update Posted: September 27, 2018
Last Verified: September 2018
Additional relevant MeSH terms:
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Weight Loss
Body Weight Changes
Body Weight