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Shedding pounds, easing back pain? new study investigates spine changes after weight loss surgery

NCT ID NCT04893954

Knowledge-focused Sponsor: Assistance Publique - Hôpitaux de Paris 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 26, 2026

Summary

This study follows 80 obese patients who are planning to have bariatric surgery. Researchers will measure back pain, spine alignment, and spinal fat before and after significant weight loss. The goal is to understand how losing a lot of weight affects the spine and whether it helps reduce low back pain.

What this could mean

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

What this could lead to
If successful, this study could clarify how weight loss after bariatric surgery impacts back pain and spine health, potentially guiding future treatments.
What could go wrong
This is an observational study with no intervention being tested, so it cannot prove cause and effect. Results may not apply to all patients.

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 80 people

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

Started

Jun 2021

Expected to finish

Sep 2029

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 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: * Age \> 18 years old * BMI \> 40 or BMI \> 35 with comorbidities due to obesity ( criteria for bariatric surgery) * Follow up in Pompidou's Hospital Nutrition service * Bariatric surgery intervention ( Sleeve gastrectomy or By pass) * Follow up possible for one year or more * Being covered by French social insurance * Consent to participate in the study Exclusion Criteria: * History of spine surgery * Bariatric surgery postoperative complication * Non mastering of french language * MRI contraindication * Patient under legal protection ( e.g. guardianship)

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Conditions

The condition(s) this trial relates to.

lipomatosis Low Back Pain Obesity obesity disorder

As listed by the trial registrant

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

Low back pain in obese patients after important weight loss

How to take part

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

  1. The places running it

    1 site. 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

  • Hopital Européen Georges Pompidou

    RECRUITING

    Paris, 75015, France

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