Clinical trial Recruiting at 4 sites Observational

Factors that determine long-term success after bariatric surgery

Official title: Determinants of the Long-Term Success of Bariatric Surgery "- Multicenter Regional Observational Study: Regional Multicentre Prospective Study

Run by University Hospital, Lille · NCT03517072 · Data updated 2026-11-12

We will see which patient and surgical factors are linked to lasting weight loss in people who had bariatric surgery at least five years ago.

Quick facts

Study typeObservational
SexAll
Enrollment1000 (estimated)
SponsorUniversity Hospital, Lille
Academic / other
Locations4 sites (Arras and 3 other locations)
StatusRecruiting
StartedJuly 31, 2018
Main results expectedJanuary 2027
Study endsJanuary 2027
Registry record updatedMay 22, 2026
Trial IDNCT03517072 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults who underwent bariatric surgery at least five years ago and are able to provide informed consent and attend follow-up at the participating centers are ideal candidates.

Probably not a fit

People who had bariatric surgery less than five years ago, are unable to consent, or cannot participate in follow-up visits are unlikely to benefit from this project.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is an observational follow-up of patients who underwent bariatric procedures five or more years ago to document long-term outcomes such as sustained weight loss, comorbidity status, complications, and quality of life. Clinical records, anthropometric measures, and patient-reported information will be collected at participating centers and analyzed to identify predictors of durable success or failure. The project aims to compare outcomes across different surgical techniques and patient profiles to inform surgical decision-making. Findings will be used to develop criteria for personalized surgical planning and targeted follow-up.

Why it matters

Potential benefit: If successful, the results could help clinicians choose the most appropriate operation for each patient and tailor follow-up to reduce long-term weight regain and complications.

How similar studies have gone: Prior cohort and registry studies have suggested some predictors of long-term outcomes after bariatric surgery, but results are inconsistent and no clear consensus exists.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients who received bariatric surgery 5 years ago.

Exclusion Criteria:

* Refusal to participate in the study,
* Unable to receive informed information,
* Unable to participate in the study

Where it's running

  • Ch Arras
    Arras, France
    Recruiting
  • Ch Boulogne-Sur-Mer
    Boulogne-sur-Mer, France
    Recruiting
  • Hôpital Claude Huriez, CHU
    Lille, France
    Recruiting
  • Ch de Valenciennes
    Valenciennes, France
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.