NCT06910735

Financial Incentives and Weight Loss in Failed Bariatric Surgery

Effect of Financial Incentives on Weight Loss in Patients With Failed Bariatric Surgery: A Multicenter Randomized Open-Label Trial

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 264 (estimated)
• Sponsor: Assistance Publique - Hôpitaux de Paris · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This national, prospective, multicenter, and randomized study seeks to evaluate the effect of financial incentives on weight loss in individuals who experience weight regain following bariatric surgery. The study also aims to conduct a cost-utility analysis to measure the effectiveness of the intervention and assess the potential budgetary implications if it were to be implemented on a wider scale.

Detailed description

Our intervention is based on the principle of "contingency management" whereby financial rewards are contingent upon meeting specific weight loss targets. To assess the effectiveness of this approach, patients who have experienced weight regain after bariatric surgery will be randomly assigned to one of three groups. Group 1 will receive the standard care that includes setting a weight-loss target based on the weight achieved at 12 months post-bariatric surgery following the standard multidisciplinary follow-up at the inclusion center. Group 2 will receive the same treatment as the control group (Group 1), but with an additional financial incentive if the weight loss target (corresponding to the weight they reached 12 months after bariatric surgery) is achieved 12 months after inclusion. Group 3 will receive the same treatment as the control group (Group 1), but the financial incentive will be proportional to the actual weight loss achieved relative to the weight loss target (corresponding to the weight they reached 12 months after bariatric surgery). The study will include a standard post-bariatric surgery follow-up visits scheduled at 6, 12, 18, and 24 months, as per routine practice. At the 12-month visit, participants will be eligible to receive a financial incentive based on their arm assignment and the extent of weight loss achieved. After the 12-month visit, participants will not receive any additional financial incentives until the 24-month visit.

Conditions

• Obesity
• Obesity Recidivism

Interventions

Type	Name	Description
OTHER	Control	Participants will receive the standard care that includes setting a weight-loss target based on the weight achieved at 12 months post-bariatric surgery following the standard multidisciplinary follow-up at the inclusion center
BEHAVIORAL	Threshold financial incentive	Participants will receive the standard care with an additional financial incentive of 300 € if they successfully achieve the weight loss target corresponding to their weight at 12 months after bariatric surgery. This financial incentive will be awarded 12 months after their inclusion in the study.
BEHAVIORAL	Proportional financial incentive	Participants will receive the standard care with an additional financial incentive, which will be determined based on the proportion of their actual weight loss in relation to the predefined weight loss target corresponding to their weight at 12 months after bariatric surgery. The financial incentive can be up to 300 € if the weight loss target is achieved 12 months after their inclusion in the study.

Timeline

• Start date: 2025-04-01
• Primary completion: 2028-04-01
• Completion: 2029-04-01
• First posted: 2025-04-04
• Last updated: 2025-04-04

Locations

12 sites across 1 country: France