Personalizing Financial Incentives

Not Applicable

Not yet recruiting

• Conditions: Obesity & Overweight

• Registration Number: NCT07225426
• Lead Sponsor: University of Utah

Brief Summary

The purpose of this study is to determine the feasibility of providing personalized incentives for dietary self-monitoring and/or interim weight loss to people enrolled in a weight-loss program

Detailed Description

In this study, community outpatients will participate in a clinician-facilitated, group-based behavioral weight-loss program for 24 weeks. Dietary self-monitoring data (input by patients via a mobile phone dietary application) and weight data (input by patients via cellular scale) will be collected by a software platform. A reinforcement learning algorithm will use data collected during the trial to predict which participants will respond to a financial incentive. Incentives will be provided to participants predicted to respond, and they will be notified of incentives via text messaging.

Study Timeline

• Status Verified: 2025-11
• Study First Submitted: 2025-11-04
• Study First Submitted QC: 2025-11-05
• Last Update Submitted: 2025-11-05
• Study First Posted: 2025-11-06
• Last Update Posted: 2025-11-06
• Study Start: 2025-12-01
• Primary Completion: 2026-02
• Study Completion: 2026-02-01

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 80

Inclusion Criteria

1. Willing to attend virtual baseline and follow-up data collection visits
2. At least 18 years of age
3. Verified obesity as defined as a BMI ≥30 kg/m2
4. Agree to attend 13 biweekly group classes (virtual) delivered by a registered dietitian
5. Agree to review study materials between classes
6. Regular access to an unshared smart phone
7. Reliable access to internet
8. Able to speak and read English
9. Desire to lose weight
10. Able to connect to a video conference call using a smartphone, tablet or computer with a webcam and microphone
11. Ability to download and use Fitbit app daily
12. Have or be willing to create a Gmail address
13. Physical ability to stand on a scale without support

Exclusion Criteria

1. Weight loss of at least 10lbs in the month prior to screening
2. Weight > 380lbs
3. Currently enrolled or enrolled in the previous month in a clinical, research, or community program focusing on lifestyle change that could affect weight
4. New user of weight loss medication
5. Pregnant, lactating or planning on becoming pregnant during the study
6. History of bariatric procedure or planning to have bariatric procedure in the study timeframe
7. Residing in a nursing home, skilled nursing facility or assisted living facility
8. Impaired hearing
9. Significant dementia, drug or alcohol abuse, or unstable psychiatric illness (e.g., schizophrenia, psychosis)
10. Current treatment for cancer or being treated for cancer (besides basal cell carcinoma or squamous cell) in the last 6 months
11. Use of insulin, sulfonylureas, or meglitinides due to increased risk for hypoglycemia
12. Diuretic medication doses higher than hydrochlorothiazide or chlorthalidone 25 mg daily, furosemide 40 mg daily, torsemide 20 mg daily, bumetanide 1 mg daily, or any use of metolazone; use of potassium-sparing diuretics is acceptable
13. Unstable heart disease in the 6 months prior to screening
14. Chronic kidney disease at stage 4 or higher
15. Exertional chest pain
16. Pain, fainting, or other conditions that prohibit mild/moderate exercise
17. History of ascites requiring paracentesis
18. Inducing vomiting to prevent weight gain or counteract the effects of eating an average of 1 time per week or more in the past 3 months*
19. Not suitable for study participation due to other reasons at the discretion of the investigators

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Primary Outcome Measures

Name	Time	Method
Screening-to-enrollment ratio	Week 0	number of potential participants screened for the study/ number of participants who provide a baseline weight for the intervention
Retention for outcomes	25 weeks	number of participants who provide a weight at 25 weeks/number of participants who provide a baseline weight for the intervention

Secondary Outcome Measures

Name	Time	Method
Adherence to calorie logging	24 weeks	Proportion of weeks participants achieve adequate calorie logging (5 days per week)
Adherence to self-weighing	24 weeks	Proportion of weeks participants weigh at least twice per week on a study-provided cellular scale
Body weight	baseline to 25 weeks	Changes in body weight from baseline to week 25, measured by study-provided cellular scales

Trial Locations

Locations (1)

University of Utah; 🇺🇸 Salt Lake City, Utah, United States