Brigham and Women's Healthy Weight Study

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.

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