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Gastric bypass showdown: which surgery cures diabetes best?

NCT ID NCT03821636

Disease control Sponsor: University Hospital, Lille Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study compares two versions of Roux-en-Y gastric bypass surgery to see which one is better at putting type 2 diabetes into remission in severely obese patients. The trial will enroll 396 people with a BMI of 35 or higher and type 2 diabetes. Participants will be randomly assigned to receive either a long alimentary limb or a long biliary limb bypass, and researchers will measure diabetes remission rates along with weight loss and complications.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Roux-en-Y gastric bypass surgery (two variants: long alimentary limb or long biliary limb)
What this could lead to
If successful, this could show that a specific type of gastric bypass surgery is more effective at putting type 2 diabetes into remission for severely obese patients.
What could go wrong
This is a surgical trial with inherent risks like infection or bowel obstruction. The results may not apply to all patients, and diabetes remission may not be permanent.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 396 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2019

Expected to finish

Jun 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 60 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * BMI ≥ 35 kg/m2 * All patient with type 2 diabetes * Patients who were candidates for obesity surgery in accordance with French recommendation Exclusion Criteria: * Severe cognitive or mental disorders * patient who have already undergone obesity surgery * Severe and non-stabilised eating disorders * The likely inability of the patient to participate in lifelong medical follow-up * Alcohol or psychoactive substances dependence * The absence of identified prior medical management of obesity * Diseases that are life-threatening in the short and medium term; * Contraindications to general anaesthesia.

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder type 2 diabetes mellitus

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Diabetes mellitus type 2 in obese

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    4 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Ch Boulogne-Sur-Me

    RECRUITING

    Boulogne-sur-Mer, 62321, France

  • Ch de Valenciennes

    RECRUITING

    Valenciennes, France

  • Chu Amiens Picardie

    RECRUITING

    Amiens, France

  • Hop Claude Huriez Chu Lille

    RECRUITING

    Lille, 59037, France

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