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Taking people in FranceNo phase

Studying what affects long-term results of weight-loss surgery in people with severe obesity

Follows people with severe obesity who have bariatric surgery, to learn what predicts long-term success.

Key facts

Who runs it
University Hospital, Lille
Where
Arras, Boulogne-sur-Mer, Lille, and Valenciennes, FranceSee the 4 sites
Trial code
Registry title
Determinants of the Long-Term Success of Bariatric Surgery
Status
Recruiting
People taking part
1,000 people, planned
Started
31 Jul 2018
Expected to end
Jan 2027
Type of study
Observational
Record updated
22 May 2026

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for people who had bariatric (weight-loss) surgery 5 years ago. It studies what shapes long-term results of the surgery.

Sex
Women and men can join.
Earlier treatment
People must have had bariatric surgery 5 years ago.

Main reasons for not taking part

  • Refusing to take part in the study
  • Unable to receive information about the study
  • Unable to take part in the study

The registry criteria, word for word

Show all 4 criteriaShow less

Who can take part

  • Patients who received bariatric surgery 5 years ago

Who cannot take part

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

Where in France

  • CH ArrasArras, FranceContact: François PATTOU, MD,PhDTaking people
  • CH Boulogne sur MerBoulogne-sur-Mer, FranceContact: François PATTOU, MD,PhDTaking people
  • Hôpital Claude Huriez, CHULille, FranceContact: François Pattou, MD,PhD (principal investigator)Taking people
  • CH de ValenciennesValenciennes, FranceContact: François PATTOU, MD,PhDTaking people

About the trial

What the trial wants to find out

The management of obesity is based on a multidisciplinary approach and justifies the use of surgery in patients with the most severe forms. Surgery for obesity or bariatric surgery generally allows rapid and significant weight loss however it is associated with significant risks, and its long-term results remain heterogeneous and unpredictable. Long-term data will clarify the role of different types of bariatric surgery in surgical strategy, improve patient information and identify predictors of failure in order to provide personalised and tailored surgery for each candidate .

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
Determinants of the Long-Term Success of Bariatric Surgery "- Multicenter Regional Observational Study: Regional Multicentre Prospective Study
Plain-language title
Studying what affects long-term results of weight-loss surgery in people with severe obesityGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 12 November 2026.
Record updated
22 May 2026