SHARE Study 4: Financial Incentives for Weight Loss

Study Overview
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Brief Summary
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The purpose of this study is to examine different types of monetary incentive paradigms for weight loss.

Official Title
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Using a State-wide Initiative to Disseminate Effective Behavioral Weight Loss Strategies: Study 4

Conditions
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Obesity

Intervention / Treatment
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* Behavioral: Online weight loss + incentives for behavior 3 months
* Behavioral: Online weight loss + incentives for weight loss at month 3
* Behavioral: Online weight loss + Incentives for behavior 12 months
* Behavioral: Online weight loss + Incentives for weight loss 12 months


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: BMI >=25kg/m2 English speaking Age 18-70 Exclusion Criteria: Health problems that make weight loss or unsupervised exercise unsafe Current pregnancy or plan to become pregnant int he next 12 months Planned relocation Current participation in weight loss research study

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Online weight loss + Incentives for behavior 3 months<br> | Behavioral: Online weight loss + incentives for behavior 3 months<br>* Participants will receive monetary incentives for submitting their behavior change information into a study website<br>|
| Active Comparator: Online weight loss + Incentives for weight loss 3 months<br> | Behavioral: Online weight loss + incentives for weight loss at month 3<br>* Participants will receive an incentive for meeting their weight loss goal at month 3.<br>|
| Active Comparator: Online weight loss + Incentives for behavior 12 months<br> | Behavioral: Online weight loss + Incentives for behavior 12 months<br>* Participants will receive incentives for submitting behavior change information over the course of 12 months.<br>|
| Active Comparator: Online weight loss + Incentives for weight loss 12 months<br> | Behavioral: Online weight loss + Incentives for weight loss 12 months<br>* Participants will be receive monetary incentives for reaching their weight loss goal at months 3 and 12.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| weight change from initial assessment to the 3-month follow-up assessment measured on a digital scale to the nearest 0.1-kilogram |  | 0 to 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| weight change from the initial assessment to the 12 month assessment measured on a digital scale to the nearest 0.1-kilogram |  | 0 to 12 months | 
| Weight change from the 3 month assessment to the 12 month assessment measured on a digital scale to the nearest 0.1-kilogram |  | 3 to 12 months |