Contingency Management to Promote Weight Loss in Low Income Adults

Status

Completed

Phases

Phase 2

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00875199

Enrollment

Registered

2009-04-03

Start date

2009-03-31

Completion date

2010-03-31

Last updated

2011-11-21

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

Conditions

Overweight

Keywords

Overweight, Obesity, Contingency Management

Brief summary

This study is designed to evaluate the feasibility and provide preliminary evidence for efficacy of a 12-week contingency management intervention to promote weight loss in overweight and obese low income adults in a community-based clinic. The study has three primary goals: (a) to determine if the contingency management treatment can be effectively applied to a new application, weight loss; (b) to obtain preliminary evidence for contingency management's efficacy in promoting weight loss and improving treatment retention, diet quality, physical activity levels, and self efficacy; and (c) to identify barriers and challenges to implementing contingency management for weight loss among low income patients.

Interventions

BEHAVIORALcontingency management

Prize-based contingency management for weight loss

BEHAVIORALweight loss manual-guided individual therapy sessions

once weekly counseling session with research staff

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 55 Years

Healthy volunteers

Inclusion criteria

* age between 18 and 55 years * body mass index in kg/m2 (BMI) between 25 and 39.9 * resting blood pressure between 90/60 and 140/90 * ability to speak English and read at the 6th grade level * willingness to be randomly assigned to one of two groups

Exclusion criteria

* any serious acute or chronic medical problems that may impact dietary or exercise regimens * psychiatric conditions

Design outcomes

Primary

Measure	Time frame
absolute and relative weight loss	pre-treatment, weekly during active phase, post-treatment
number of participants achieving clinically significant weight loss (5% or more of baseline weight)	pre-treatment, weekly during active phase, post-treatment

Secondary

Measure	Time frame
self-reports, focus groups	pre-treatment, post-treatment
retention	during active phase
changes on measures of diet quality, physical activity, and self-efficacy	pre-treatment, post-treatment

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026