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This study will evaluate the effectiveness of financial incentives and messaging tailored to individual goals and aspirations to promote and sustain weight loss. This is a 2-arm randomized controlled trial that will recruit eligible employees at a large university to participate in a 3-month weight loss program, followed by a 3-month follow-up period. The primary outcome will be change in autonomous motivation for weight loss.
The study hypothesis is that intervention group participants will have a greater increase in autonomous motivation for weight loss than participants in the control group at 12 weeks.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Weekly Incentive | Experimental | Participants in the Weekly Incentive arm will be asked to weigh in each week during a 12 week intervention period. They will receive tailored messages and have an opportunity to win a financial reward each week they meet their weight loss goal. Participants will be asked to complete a final weight measurement at week 24. |
|
| Weekly Weigh-In | No Intervention | Participants in the Weekly Weigh-In arm will be asked to weigh in each week during a 12 week intervention period. Participants will be asked to complete a final weight measurement at week 24. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Weekly Incentive | Behavioral | The tailored incentives intervention aims to assess the impact of tailored messaging and financial incentives on weight loss among obese employees. |
| Measure | Description | Time Frame |
|---|---|---|
| Change in autonomous motivation as measured by the Treatment Self-Regulation Questionnaire | 12 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Change in weight as measured by participant weight measurements using Withings scales | 12 weeks and 24 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Change in autonomous motivation as measured by the Treatment Self-Regulation Questionnaire | 24 weeks | |
| Change in physical activity as measured by the short form of the International Physical Activity Questionnaire | 12 weeks and 24 weeks |
Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Jeffrey T Kullgren, MD,MS,MPH | University of Michigan | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Michigan | Ann Arbor | Michigan | 48109 | United States |
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| ID | Term |
|---|---|
| D015431 | Weight Loss |
| ID | Term |
|---|---|
| D001836 | Body Weight Changes |
| D001835 | Body Weight |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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| Change in eating behaviors as measured by the Three Factor Eating Questionnaire | 12 weeks and 24 weeks |
| Change in participation in weight-related wellness programs as measured by responses to the question "In the past 3 months, have you participated in any health and wellness programs?" | 12 weeks and 24 weeks |
| Change in self-efficacy to lose weight as measured by the Perceived Competence Scale | 12 weeks and 24 weeks |
| Change in stage of change for weight loss as measured by responses to the questions "Are you currently trying to lose weight?" and "Do you intend to try to lose weight in the near future?" | 12 and 24 weeks |