Global registry for understanding weight management experiences

International Weight Control Registry

Tufts University · NCT04907396

This study is asking adults to share their personal experiences with losing weight to help understand what works and what doesn't in managing weight.

Quick facts

Study typeObservational
Enrollment100000 (estimated)
Ages18 Years and up
SexAll
SponsorTufts University (other)
Locations7 sites (Birmingham, Alabama and 6 other locations)
Trial IDNCT04907396 on ClinicalTrials.gov

What this trial studies

The International Weight Control Registry (IWCR) is a global observational study designed to gather insights into the experiences of individuals with weight management. It aims to identify both the opportunities and barriers faced by people in their weight loss journeys, including successful and unsuccessful attempts. Participants aged 18 and older are invited to share their personal experiences through online surveys, contributing to a comprehensive understanding of weight loss maintenance and obesity management.

Who should consider this trial

Good fit: Ideal candidates for this study are adults aged 18 and older who are considering weight loss, actively engaged in weight loss, or have previously attempted weight loss.

Not a fit: Patients who are minors or unable to provide informed consent online will not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide valuable insights that lead to improved strategies for weight loss and obesity management.

How similar studies have performed: Other studies focusing on weight management have shown success in identifying barriers and facilitators, making this approach both relevant and potentially impactful.

Eligibility criteria

Show full inclusion / exclusion criteria
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

Where this trial is running

Birmingham, Alabama and 6 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Weight Loss, Overweight, Obesity, Weight Loss Maintenance, Obesity Management

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.