NCT04907396|Unknown
International Weight Control Registry
IWCR
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IWCR
Sponsor study identifier
observational
100,000
1 country
7
Study Start
December 10, 2020
Actual (reported)Primary Completion
December 1, 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
December 1, 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
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.
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
December 1, 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Click on a node to explore related trials.
Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
December 10, 2020
Actual (reported)May 25, 2021
Actual (reported)May 28, 2021
Actual (reported)December 1, 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
December 1, 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Percent weight change
5 Years
Up to 100,000 participants who meet eligibility requirements
University of Alabama at Birmingham
Birmingham, Alabama, 35294, United States
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.
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.
Susan B Roberts, PhD
Tufts University
James O Hill, PhD
University of Alabama at Birmingham
Sai K Das, PhD
Tufts University
Drew Sayer, PhD
University of Alabama at Birmingham
First Submitted
May 25, 2021
First Posted
May 28, 2021
Study Start
December 10, 2020
Actual (reported)Primary Completion
December 1, 2025
Estimated (date passed)Lorcaserin: Real World Experience in an Insurance-Based Weight Management Clinic
Contact the study team to confirm eligibility.
University of Colorado, Denver
Denver, Colorado, 80204, United States
University of Kansas Medical Center
Kansas City, Kansas, 66160, United States
Pennington Biomedical Research Center
Baton Rouge, Louisiana, 70808, United States
Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University
Boston, Massachusetts, 02111, United States
University of New Hampshire
Durham, New Hampshire, 03824, United States
United States Military Academy, West Point
West Point, New York, 10996, United States
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.
This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
December 1, 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Last Updated
September 19, 2024
Record last verified: 2024-09
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Source: ClinicalTrials.gov.
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