Teaching Novel Values-Based Skills to Improve Long-Term Weight Loss

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

480 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-02-19

Study Completion Date

2024-09-30

Brief Summary

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This NIDDK funded R01 project is a randomized controlled clinical trial to compare the efficacy of an intervention based on Acceptance and Commitment Therapy (ACT) and a Self-Regulation (SR) intervention on weight loss maintenance over a 30-month period. All participants will first complete a well-validated online weight loss intervention (months 1-3 of the study). Participants who lose ≥4 kilograms of initial weight will then be randomly assigned to receive ACT or SR, with both conditions consisting of face-to-face, group-based intervention meetings and weekly email contact for 6 months.

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Detailed Description

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Obesity is a major public health problem, and although short-term weight loss is achievable, individuals often regain the majority of weight that was lost. Current approaches have adjusted behavioral prescriptions and lengthened treatment contact in an effort to address this problem, with modest effect. This NIDDK funded R01 project is a randomized controlled clinical trial to compare the efficacy of an intervention based on Acceptance and Commitment Therapy (ACT) and a Self-Regulation (SR) intervention on weight loss maintenance over a 30-month period. All participants will first complete a well-validated online weight loss intervention (months 1-3 of the study). Participants who lose ≥4 kilograms of initial weight will then be randomly assigned to receive ACT or SR, with both conditions consisting of face-to-face, group-based intervention meetings and weekly email contact for 6 months. The ACT intervention will target a novel theoretically derived intervention target, values-consistent behavior, which will help align weight loss goals with personal values and foster internal motivation to continue with weight control efforts. Assessments will be at baseline, post-weight loss/pre-randomization, and then 6, 12, 18, 24, and 30-month follow-up (months from randomization). This project will be conducted at the Weight Control and Diabetes Research Center (WCDRC). The WCDRC is part of the Centers for Behavioral and Preventive Medicine at The Miriam Hospital in Providence, Rhode Island, and the Department of Psychiatry and Human Behavior at the Alpert Medical School of Brown University. This study is significant because it addresses weight loss maintenance - a critical barrier to treating obesity - and results of the study could be used to improve long-term weight loss outcomes and associated health benefits for treatment seeing overweight and obese adults.

Conditions

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Overweight and Obesity

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Acceptance and Commitment Therapy (ACT)

Focuses on addressing cognitive and emotional barriers to successful weight loss maintenance.

Group Type EXPERIMENTAL

Acceptance and Commitment Therapy (ACT)

Intervention Type BEHAVIORAL

Teaches acceptance, mindfulness, and values-based skills

Self-Regulation (SR)

Focuses on using self-monitoring and self-reinforcement techniques to improve weight loss maintenance.

Group Type EXPERIMENTAL

Self-Regulation (SR)

Intervention Type BEHAVIORAL

Teaches monitoring and reinforcement strategies designed to improve motivation and adherence to positive weight loss behavioral prescriptions.

Interventions

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Acceptance and Commitment Therapy (ACT)

Teaches acceptance, mindfulness, and values-based skills

Intervention Type BEHAVIORAL

Self-Regulation (SR)

Teaches monitoring and reinforcement strategies designed to improve motivation and adherence to positive weight loss behavioral prescriptions.

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* English language fluent and literate at the 6th grade level
* Body mass index (BMI) between 27.5 and 45 kg/m-squared
* Able to walk 2 city blocks without stopping
* Has reliable access to a computer with internet access

Exclusion Criteria

* Currently participating in another weight loss program
* Currently taking weight loss medication
* Has lost ≥5% of body weight in the 6 months prior to enrolling
* Has been pregnant within the 6 months prior to enrolling
* Plans to become pregnant within 18 months of enrolling
* Has a heart condition, chest pain during periods of activity or rest, or loss of consciousness in the 12 months prior to enrolling
* Has any medical condition that would affect the safety of participating in unsupervised physical activity
* Has any condition that would result in inability to follow the study protocol, including terminal illness and untreated major psychiatric illness

Minimum Eligible Age

25 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes