Brigham and Women's Healthy Weight Study

NCT ID: NCT02709642

Last Updated: 2020-07-30

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 42 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2016-06-30
• Study Completion Date: 2020-04-30

Brief Summary

The purpose of this study is to determine if a financial deposit contract is a successful method of helping people to maintain their weight loss. A deposit contract is an agreement in which participants put their own money at risk, with the goal of "earning" it back by achieving a goal, in this case maintaining prior weight loss. The study will also evaluate the interventions using survey research to assess the feasibility and acceptability of the interventions.

Detailed Description

Interested participants who can verify >10lb weight-loss over the last year and a half will be randomly assigned to either the control group, in which they will be asked to attend weekly weigh-ins at Brigham and Women's Hospital (BWH) over the course of a year, or to the deposit contract intervention group. Both the control group and the deposit contract group will complete the weekly weigh-ins for one year. The deposit contract group will additionally have a financial component: these participants will be asked to make a deposit of at least $100 each 10-week period over the course of one year (50 weeks), and can recoup this amount as detailed above. All participants will take baseline and end-of-study surveys.

During an enrollment meeting, study staff will request via an authorization form that participants allow approved members of the research staff to examine their electronic medical record for the duration of the study if they receive their care at a BWH-affiliated practice. This will confirm their >10lb weight loss.

At the end of every 10-week period, DC participants will receive an email with how much money they recouped. Participants who did not recoup the full amount they deposited must bring in a check to the following weigh-in to cover the difference so that participants have at least $100 deposited for the following 10-week period. Additionally, participants will have the option to use their initial study baseline weight, or be re-weighed for a new baseline weight for the following 10-week period, for which they will then use as their target weight. They will also have the option to increase or decrease their deposit for the upcoming 10-week period as needed.

Each subject may skip non-consecutive weigh-ins without losing their weekly contribution. However, if subjects skip two or more consecutive weekly weigh-ins, participants may only recoup up to one of those skipped weigh-ins if they are successful in their weight management in the week that they return for a weigh-in. Skipped weigh-ins will not roll over into a new 10-week period.

Conditions

Obesity

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: SINGLE

Study Groups

Control

Control Participants will complete weekly weigh-ins and receive emails about how their current weight compares to their baseline weight.

Group Type: NO_INTERVENTION

No interventions assigned to this group

Deposit Contract

The deposit contract group will also complete weekly weigh-ins and receive emails about how their current weight compares to their baseline weight. In addition, the deposit contract group will be asked to make a deposit of at least $100 each 10-week period over the course of one year (50 weeks). Each week, they will recoup 1/10 of their 10-week deposit if they are within two pounds of their baseline weight or lower. If they are more than two pounds above their baseline weight, they will forfeit 1/10 of their 10-week deposit. The money they forfeited for that week will go into a collective pool to be divided up at the end of each 10-week period by all deposit contract participants who successfully maintained their weight loss at the end of the 10-week period.

Group Type: EXPERIMENTAL

Deposit Contract

Intervention Type: BEHAVIORAL

A deposit contract (DC) is an agreement in which study participants puts their own money at risk, with the goal of "earning" it back by achieving a goal, in this case maintaining prior weight loss. If DC participants successfully maintain their weight, they get their money back. If they are not successful, they lose their money. For each 10 week period for one year, DC participants will make a deposit of at least $100 but will be allowed to increase their contribution if they would prefer.

Interventions

Deposit Contract

A deposit contract (DC) is an agreement in which study participants puts their own money at risk, with the goal of "earning" it back by achieving a goal, in this case maintaining prior weight loss. If DC participants successfully maintain their weight, they get their money back. If they are not successful, they lose their money. For each 10 week period for one year, DC participants will make a deposit of at least $100 but will be allowed to increase their contribution if they would prefer.

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

• employee of Brigham and Women's Hospital, Dana-Farber Cancer Institute (DFCI), Brigham and Women's Physicians Organization (BWPO), or Partners working at the Francis Street complex of Brigham and Women's Hospital (either part-time or full-time)
• 18 years of age or older
• successfully and intentionally lost at least 10lbs within the past 18 months
• had a BMI over 25 at some point over the previous 18 months

Exclusion Criteria

• plan to change jobs outside of the BWH Francis Street complex in the next year
• had weight-loss surgery in the past 3 years
• currently on a very low calorie (800 or fewer calories) liquid diet or taking weight loss medicine
• currently have cancer, a severe psychiatric disorder, an eating disorder, or another severe medical illness that may affect weight beyond control
• plan to become pregnant in the next year

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Brigham and Women's Hospital

OTHER

Sponsor Role: collaborator

Harvard Pilgrim Health Care

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Jason P Block, MD, MPH

Role: PRINCIPAL_INVESTIGATOR

Obesity Prevention Program, Department of Population Medicine, Harvard Medical School, Harvard Pilgrim Health Care Institute, Boston, MA.

Locations

Brigham and Women's Hospital

Boston, Massachusetts, United States

Countries

United States

References

Volpp KG, John LK, Troxel AB, Norton L, Fassbender J, Loewenstein G. Financial incentive-based approaches for weight loss: a randomized trial. JAMA. 2008 Dec 10;300(22):2631-7. doi: 10.1001/jama.2008.804.

Reference Type: BACKGROUND

PMID: 19066383 (View on PubMed)

Jeffery RW, Thompson PD, Wing RR. Effects on weight reduction of strong monetary contracts for calorie restriction or weight loss. Behav Res Ther. 1978;16(5):363-9. doi: 10.1016/0005-7967(78)90005-0. No abstract available.

Reference Type: BACKGROUND

PMID: 743075 (View on PubMed)

Other Identifiers

1K23HL111211-03

Identifier Type: NIH

Identifier Source: org_study_id

View Link