Weight Loss
Conditions
Brief summary
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.
Interventions
BEHAVIORALWeekly Incentive
The tailored incentives intervention aims to assess the impact of tailored messaging and financial incentives on weight loss among obese employees.
Sponsors
University of Michigan
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No
Inclusion criteria
* Interested in losing weight * Body Mass Index between 30 and 40 kg/m2 * Have wireless internet at home * Have Android or iOS smart device * Willing to record themselves weighing in on a scale or let a family member record them weighing in on a scale
Exclusion criteria
* Pregnant or lactating, or intending to become pregnant in the next 6 months * Taking medication (other than metformin) for diabetes to control blood sugar * Having a serious psychiatric diagnosis, unstable medical conditions or experienced a heart attack or stroke in the past 6 months * Having a history of drug or alcohol abuse or addiction to prescription medications
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Change in autonomous motivation as measured by the Treatment Self-Regulation Questionnaire | 12 weeks |
Secondary
| Measure | Time frame |
|---|---|
| Change in weight as measured by participant weight measurements using Withings scales | 12 weeks and 24 weeks |
Other
| Measure | Time frame |
|---|---|
| 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 autonomous motivation as measured by the Treatment Self-Regulation Questionnaire | 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 |
| Change in self-efficacy to lose weight as measured by the Perceived Competence Scale | 12 weeks and 24 weeks |
| Change in physical activity as measured by the short form of the International Physical Activity Questionnaire | 12 weeks and 24 weeks |
Countries
United States
Outcome results
None listed