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Which obesity surgery is safer? new trial pits standard vs. simpler approach

NCT ID NCT03938571

Disease control Sponsor: Värmland County Council, Sweden Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study compares two weight-loss surgeries for people with severe obesity (BMI over 45). One is the standard duodenal switch, and the other is a simpler version called SADI. Researchers track weight loss, health improvements like diabetes and high blood pressure, and complications. The goal is to see which surgery works better and causes fewer problems.

What this could mean

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

Active substance
Duodenal switch surgery (standard or single-anastomosis duodeno-ileostomy)
What this could lead to
If one surgery proves safer and equally effective, it could become the preferred option for severe obesity, reducing complications while maintaining weight loss.
What could go wrong
This is a small, single-center trial with only 56 participants. Results may not apply to everyone, and both surgeries carry risks like malnutrition or complications.

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

56 people

The number who actually took part.

Started

Aug 2016

Expected to finish

Jan 2029

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

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

Ages

18 years and older

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 over 45 * Ability to understand the legal background of a study Exclusion Criteria: * Previous bariatric or anti-reflux surgery * Drug-abuse * Inflammatory bowel disease * Complex psychiatric situation

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Conditions

The condition(s) this trial relates to.

abdominal obesity-metabolic syndrome Malnutrition metabolic syndrome X nutritional deficiency disease Obesity obesity disorder

As listed by the trial registrant

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

Malnutrition Metabolic syndrome Obesity Surgery

More trials for these conditions

Other studies related to the condition(s) this trial covers.