Testing Strategies to Encourage Weight Loss in an Employer Setting

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT01208350

Enrollment

105

Registered

2010-09-23

Start date

2011-03-31

Completion date

2014-08-31

Last updated

2014-09-08

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Weight Loss

Keywords

Weight Loss, Motivation, Workplace, Web platform

Brief summary

This is a 3-arm pilot randomized controlled trial to evaluate the effectiveness of two novel ways of structuring financial incentives to motivate and sustain long-term weight loss. The study will recruit eligible employees at Children's Hospital of Philadelphia (CHOP) to participate in a 6-month weight loss program and an additional 3-month follow-up period. The primary outcome measure in this randomized control trial will be pounds of weight lost between baseline and 6 months. The goal of this study is to evaluate whether a novel financial incentive program delivered through a workplace can effectively encourage sustained weight loss among obese employees. The study hypotheses are 1) mean weight loss will be greater in all the intervention groups compared to the control group by the end of the 24-week intervention period; and 2) individuals in the intervention groups will have a lower mean weight at the end of the 12-week follow-up period than individuals in the control group.

Interventions

BEHAVIORALNo intervention

Monthly weigh-ins for 6 months without financial incentives associated with weight loss, and follow-up weigh-in at 9 months

BEHAVIORALGroup-based payout

Monthly weigh-ins for 6 months where five sequential participants, randomized to this condition, will be joined into virtual groups where individual rewards for weight loss are dependent on the weight loss of others in the group, with follow-up weigh in at 9 months

BEHAVIORALIndividual payout

Monthly weigh-ins for 6 months and if monthly goals are met, participants receive payout at the end of the month, with follow-up weigh-in at 9 months

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 70 Years

Healthy volunteers

Yes

Inclusion criteria

* Aged 18 to 70 (inclusive) * BMI between 30 and 40 (inclusive)

Exclusion criteria

* Inability to consent * Illiteracy and/or inability to speak, read, and write English * Participation in another research study * Current treatment for drug or alcohol use * Consumption of ≥ 5 alcoholic drinks per day * Myocardial infarction or stroke within the past 6 months * Current addiction to prescription medicines or street drugs * Serious psychiatric diagnoses (e.g., severe major depressive disorder, bipolar disorder, schizophrenia) * Pregnant or currently breastfeeding * Diabetic and using any medicine besides metformin to control blood glucose * Metastatic cancer * Unstable medical conditions that would likely prevent the subject from completing the study * Previous diagnosis of an eating disorder * History of unsafe weight loss behaviors such as binging or the use of laxatives

Design outcomes

Primary

Measure	Time frame
Change in weight between baseline and six months	24 weeks

Secondary

Measure	Time frame
usability of a newly developed web portal and its feasibility for future randomized clinical trials aimed at changing health-related behaviors	end of study

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 23, 2026