Using Novel Behavioral Approaches to Improve Long-Term Weight Loss Outcomes

September 16, 2019 updated by: The Miriam Hospital
This project is a randomized controlled trial to compare the efficacy of two interventions- one based on Acceptance and Commitment Therapy (ACT) and one based on Self-Regulation (SR)- and a control group (called weight loss only (WLO)) on 24-month weight loss outcomes. All participants will first participate in an initial 4-month standard behavioral weight loss program. Participants will be randomized into 1 of 3 groups and receive a 3-part workshop; the ACT workshop will teach ACT skills including acceptance and mindfulness techniques designed to promote behavior change and health behavior persistence consistent with one's core values. The SR program will focus on self-regulation, regular weighing, and modeling behavior on successful maintainers. The WLO group will receive a control workshop focused on cooking demonstrations and general nutrition topics.The primary outcome is weight loss at 24 months. The secondary outcome is change in psychological flexibility, a critical component of ACT interventions and a potential innovative mediating mechanism. Primary Hypothesis: At 24 months, the ACT group will show significantly greater weight loss as compared to the SR and WLO groups.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Anticipated)

190

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Rhode Island
      • Providence, Rhode Island, United States, 02903
        • Weight Control and Diabetes Research Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

30 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • BMI 27.5-40
  • Age 30-65

Exclusion Criteria:

  • currently participating in a weight loss program
  • pregnant or planning to become pregnant
  • medical condition that would preclude physical activity
  • terminal illness
  • plans to relocate
  • history of substance abuse or psychological problems that are judged by the investigators to be likely to interfere with study participation

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: ACT
Behavioral weight loss plus techniques from Acceptance and Commitment Therapy
Behavioral: ACT
Treatment is based on Acceptance and Commitment Therapy
Active Comparator: SR
Behavioral weight loss plus self-regulation techniques
Behavioral: SR
Treatment is based on Self-Regulation theory.
Active Comparator: WLO
Behavioral weight loss plus cooking tips and demonstrations
Behavioral: WLO
Treatment is based on cooking tips and demonstrations.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Weight
Time Frame: 24 months
24 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

The Miriam Hospital

Collaborators

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Investigators

  • Principal Investigator: Jason Lillis, Ph.D., Lifespan/ The Miriam Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2015

Primary Completion (Actual)

July 1, 2018

Study Completion (Actual)

August 29, 2019

Study Registration Dates

First Submitted

May 22, 2014

First Submitted That Met QC Criteria

June 3, 2014

First Posted (Estimate)

June 5, 2014

Study Record Updates

Last Update Posted (Actual)

September 18, 2019

Last Update Submitted That Met QC Criteria

September 16, 2019

Last Verified

August 1, 2019

More Information

Terms related to this study

Other Study ID Numbers

  • 5K23KDK097143

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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