Follow-up care for people five years after bariatric surgery who were lost to follow-up

Evaluation of the Care Provided to Patients Who Underwent Bariatric Surgery and Were Lost to Follow-up 5 Years After Surgery

Observational Central Hospital, Nancy, France · NCT07118540

This project will try to compare health outcomes and care needs for people who had bariatric surgery and either were lost to follow-up or remained under follow-up five years after their operation.

Quick facts

Study typeObservational
Enrollment176 (estimated)
Ages18 Years to 65 Years
SexAll
SponsorCentral Hospital, Nancy, France Academic / other
Locations2 sites (Nancy, Lorraine and 1 other locations)
Trial IDNCT07118540 on ClinicalTrials.gov

What this trial studies

Using the OBESEPI cohort from Nancy University Hospital, researchers will identify patients who underwent bariatric surgery between 2013 and 2018 and compare those lost to follow-up at five years with those still being monitored. Participation involves a single 30-minute questionnaire and review of medical records; the inclusion period is 3 months and the total project duration is 9 months. Eligible patients met French HAS criteria for surgery (BMI > 40 or BMI > 35 with obesity-related complications). Patients are classified as lost to follow-up if there is no record of a visit to the surgical department five years after inclusion.

Who should consider this trial

Good fit: Ideal candidates are patients included in the OBESEPI cohort who had bariatric surgery at Nancy University Hospital between 2013 and 2018, meet HAS surgical criteria (BMI > 40 or BMI > 35 with complications), and have not objected to use of their data.

Not a fit: Patients not in the OBESEPI cohort, those who object to participation or data use, pregnant or breastfeeding women, people under legal guardianship or curatorship, and those deprived of liberty are excluded and will not benefit from this project.

Why it matters

Potential benefit: If successful, the project could reveal where long-term care breaks down and guide steps to improve lifelong monitoring to prevent nutritional deficiencies and other complications after bariatric surgery.

How similar studies have performed: Previous cohort studies have consistently shown high rates of loss to follow-up after bariatric surgery and linked this to nutritional complications, but interventions to reliably prevent loss to follow-up have had limited and mixed success.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* \> Patients included in the OBESEPI cohort;

  * Individuals who have received complete information about the organisation of the research and have not objected to their participation and the use of their data;
  * Affiliation with a social security scheme.

Exclusion Criteria:

* \>Patient who objects to participating in this research;

  * Pregnant and breastfeeding women;
  * Patients under legal guardianship or curatorship;
  * Patients deprived of their liberty by a judicial or administrative decision.

Where this trial is running

Nancy, Lorraine and 1 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.
Conditions Obesity &AmpOverweightobesitybariatric surgeryoverweightlost to follow-up
Last reviewed 2026-06-10 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.