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Weight LossIWCRNCT04907396

International Weight Control Registry

An observational study of Weight Loss and Overweight, run by Tufts University at 7 sites in United States.

Unknown status

Status not confirmed. The sponsor has not verified this record for over two years, so it may be out of date.

Official record
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Trial summary

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. Read more about this study

Who is it for?
Ages 18 years and olderHealthy volunteers can take part
Conditions the study is for
Weight Loss, Overweight, Obesity
How many people
100,000 participants
Where
7 sitesUnited States
Study dates
10 Dec 2020to 1 Dec 2025
How long will I take part?
5 Years
Phase
Observational
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Study population: Up to 100,000 participants who meet eligibility requirements

Who may be able to join

  • 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)

Who cannot join

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

Trial locations and contacts

7 sites in 1 country.

James E Friedman, MPH contact

205-962-8185

jfriedman@uabmc.edu

Jennifer L Oslund, MS contact

702-468-2263

Jennifer.Oslund@tufts.edu

7 sites in 1 country

United States7 sites, 7 recruiting

  • Pennington Biomedical Research Center

    Baton Rouge, Louisiana, 70808

    Frank Greenway, MD, frank.greenway@pbrc.edu

    Frank Greenway, MD

    Recruiting

  • University of Alabama at Birmingham

    Birmingham, Alabama, 35294

    James E Friedman, MPH, (205) 962-8185, jfriedman@uabmc.edu

    Drew Sayer, PhD, sayerd@uab.edu

    Recruiting

  • Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University

    Boston, Massachusetts, 02111

    Jennifer L Oslund, MS, 702-468-2263, Jennifer.Oslund@tufts.edu

    Susan B Roberts, PhD, 617-556-3238, susan.roberts@tufts.edu

    Recruiting

  • University of Colorado, Denver

    Denver, Colorado, 80204

    Ann E Caldwell, PhD, ann.caldwell@cuanschutz.edu

    Ann E Caldwell, PhD

    Recruiting

  • University of New Hampshire

    Durham, New Hampshire, 03824

    Carlota Dao, PhD, carlota.dao@unh.edu

    Carlota Dao, PhD

    Recruiting

  • University of Kansas Medical Center

    Kansas City, Kansas, 66160

    Anna M Gorczyca, PhD, agorczyca@ku.edu

    Joseph Donnelly, E.D.D.

    Recruiting

  • United States Military Academy, West Point

    West Point, New York, 10996

    Diana M Thomas, PhD, diana.thomas@westpoint.edu

    Diana M Thomas, PhD

    Recruiting

Other trials in United States

About this study

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.

Keywords
Weight Loss Maintenance, Obesity Management
Medical subject headings
Weight Loss, Overweight, Obesity

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Percent weight change

    Measured: 5 Years

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted28 May 2021
  2. Study start10 Dec 2020
  3. Primary completion1 Dec 2025 (estimated)
  4. Study completion1 Dec 2025 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Other
Enrolment
100,000 participants (estimated)
Target duration
5 Years
IDs, dates and publications
ClinicalTrials.gov ID
NCT04907396
Sponsor's protocol ID
13075
Acronym
IWCR
Status last verified
Sep 2024
First submitted
25 May 2021
Last updated
19 Sep 2024
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided: Data will be shared. Specific to be determined

Publications

  • Chui TK, Cedillo YE, El Zein A, Pavela G, Caldwell AE, Peters JC, Friedman JE, DebRoy S, Oslund JL, Das SK, Roberts SB, Hill JO, Sayer RD. Evaluation of socioecological factors on health behaviors and weight change during major life event: A cross-sectional study using data collected during the COVID-19 pandemic. Obes Sci Pract. 2024 Aug 10;10(4):e785. doi: 10.1002/osp4.785. eCollection 2024 Aug.

    PubMed 39130192

  • Caldwell AE, More KR, Chui TK, Sayer RD. Psychometric validation of four-item exercise identity and healthy-eater identity scales and applications in weight loss maintenance. Int J Behav Nutr Phys Act. 2024 Feb 23;21(1):21. doi: 10.1186/s12966-024-01573-y.

    PubMed 38395833

  • Roberts SB, Das SK, Sayer RD, Caldwell AE, Wyatt HR, Mehta TS, Gorczyca AM, Oslund JL, Peters JC, Friedman JE, Chiu CY, Greenway FL, Donnelly JE, Dao MC, Cuevas AG, Affuso O, Wilkinson LL, Thomas D, Al-Ozairi E, Yannakoulia M, Khazrai YM, Manalac RJ, Bachiashvili V, Hill JO. Technical report: an online international weight control registry to inform precision approaches to healthy weight management. Int J Obes (Lond). 2022 Sep;46(9):1728-1733. doi: 10.1038/s41366-022-01158-4. Epub 2022 Jun 16.

    PubMed 35710944

Questions about this trial

What is this clinical trial studying?

An observational study of Weight Loss and Overweight, run by Tufts University at 7 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: status not confirmed, as of the sponsor's last update on 19 Sep 2024. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 7 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

Contact James E Friedman, MPH (205-962-8185, jfriedman@uabmc.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Percent weight change (time frame: 5 Years). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04907396, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 Sep 2024; AzTrials last refreshed its copy on 28 Oct 2026.

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