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Norwegian study reveals best bariatric surgery for lasting weight loss

NCT ID NCT01533142

Disease control Sponsor: Helse Fonna 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
Running, but no longer taking on new participants.
Completed This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 followed 543 adults aged 18-60 who had bariatric surgery at four hospitals in Norway. Each hospital used a different surgical method, allowing researchers to compare how well each approach helped with weight loss and type 2 diabetes remission. The goal was to find which surgery works best for long-term health improvements.

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.

Participants

543 people

The number who actually took part.

Start date

Feb 2012

Finished

Feb 2020

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.

Who is studied

Both sexes 18-60 years old Patients with morbid obesity that is applied to the bariatric surgery. Signed informed consent

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: * Both sexes 18-60 years old * Patients with morbid obesity that is applied to the bariatric surgery. * Signed informed consent Exclusion Criteria: * Patients who become pregnant in the follow-up period will not continue in the study but the data will be treated as lost too follow up.

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Conditions

The condition(s) this trial relates to.

diabetes mellitus morbid obesity Urinary Incontinence Weight Loss

As listed by the trial registrant

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

Diabetes mellitus Urinary incontinence Weight loss

Contacts and locations

Locations

  • Helse-Fonna

    Haugesund, Haugesund, 5528, Norway

More trials for these conditions

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