International Weight Control Registry (IWCR)

December 7, 2022 updated by: Susan Roberts, Tufts University
The IWCR is a global scientific study aimed at better understanding the opportunities and barriers for reducing the prevalence of obesity by collecting information from people who have experience with weight management in their everyday lives. The investigators seek to gather information on a wide range of weight management experiences, ranging from weight loss and weight loss maintenance to weight gain and inability to lose weight.

Study Overview

Status

Recruiting

Conditions

Study Type

Observational

Enrollment (Anticipated)

100000

Contacts and Locations

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

Study Contact

Study Contact Backup

Study Locations

  • United States
    • Alabama
      • Birmingham, Alabama, United States, 35294
        • Recruiting
        • University of Alabama at Birmingham
        • Contact:
        • Contact:
        • Principal Investigator:
          • James O Hill, PhD
        • Sub-Investigator:
          • Drew Sayer, PhD
        • Sub-Investigator:
          • Holly Wyatt, MD
        • Sub-Investigator:
          • Olivia Affuso, PhD
        • Sub-Investigator:
          • Larrell Wilkinson, PhD
        • Sub-Investigator:
          • Tapan Mehta, PhD
    • Colorado
      • Denver, Colorado, United States, 80204
        • Recruiting
        • University of Colorado, Denver
        • Contact:
        • Principal Investigator:
          • Ann E Caldwell, PhD
        • Sub-Investigator:
          • John C Peters, PhD
    • Kansas
      • Kansas City, Kansas, United States, 66160
        • Recruiting
        • University of Kansas Medical Center
        • Contact:
        • Principal Investigator:
          • Joseph Donnelly, E.D.D.
        • Sub-Investigator:
          • Anna M Gorczyca, PhD
    • Louisiana
      • Baton Rouge, Louisiana, United States, 70808
        • Recruiting
        • Pennington Biomedical Research Center
        • Principal Investigator:
          • Frank Greenway, MD
        • Contact:
        • Sub-Investigator:
          • Raoul Manalac, MD
    • Massachusetts
      • Boston, Massachusetts, United States, 02111
        • Recruiting
        • Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University
        • Contact:
        • Contact:
        • Principal Investigator:
          • Susan B Roberts, PhD
        • Sub-Investigator:
          • Sai K Das, PhD
        • Sub-Investigator:
          • Adolfo Cuevas, PhD
    • New Hampshire
      • Durham, New Hampshire, United States, 03824
        • Recruiting
        • University of New Hampshire
        • Contact:
        • Principal Investigator:
          • Carlota Dao, PhD
    • New York
      • West Point, New York, United States, 10996
        • Recruiting
        • United States Military Academy, West Point
        • Contact:
        • Principal Investigator:
          • Diana M Thomas, PhD

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Up to 100,000 participants who meet eligibility requirements

Description

Inclusion Criteria:

  • The IWCR is open to anyone 18 years or older who is considering weight loss, is actively engaged in weight loss, or has previously attempted weight loss (including successful and unsuccessful attempts)

Exclusion Criteria:

  1. Minors, below the age of 18
  2. Adults who are not able to give informed consent online and complete online surveys

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

  • Observational Models: Cohort
  • Time Perspectives: Other

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Percent weight change
Time Frame: 5 Years
5 Years

Collaborators and Investigators

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

Sponsor

Tufts University

Collaborators

University of Colorado, Denver
University of Alabama at Birmingham
University of Kansas Medical Center
Pennington Biomedical Research Center
University of New Hampshire
United States Military Academy, West Point

Investigators

  • Principal Investigator: James O Hill, PhD, University of Alabama at Birmingham
  • Study Director: Sai K Das, PhD, Tufts University
  • Study Director: Drew Sayer, PhD, University of Alabama at Birmingham

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

Helpful Links

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 (Actual)

December 10, 2020

Primary Completion (Anticipated)

December 1, 2025

Study Completion (Anticipated)

December 1, 2025

Study Registration Dates

First Submitted

May 25, 2021

First Submitted That Met QC Criteria

May 25, 2021

First Posted (Actual)

May 28, 2021

Study Record Updates

Last Update Posted (Estimate)

December 9, 2022

Last Update Submitted That Met QC Criteria

December 7, 2022

Last Verified

December 1, 2022

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 13075

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

Undecided

IPD Plan Description

Data will be shared. Specific to be determined

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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