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Weight-Loss surgery before knee replacement: does it help or hurt?

NCT ID NCT06433700

Knowledge-focused Sponsor: Bispebjerg Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 examined nearly 100,000 people who had knee replacement for arthritis to see if those who previously had weight-loss surgery faced different risks of complications or needing another surgery. Researchers focused on how body weight at the time of knee replacement and the type of weight-loss surgery affected outcomes. The goal is to help doctors better predict and improve results for these 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.

Participants

99,965 people

The number who actually took part.

Started

Jun 2024

Finished

Feb 2025

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

The investigators will include patients with primary/idiopathic or secondary (due to meniscus or cruciate ligament lesion) osteoarthritis (OA) who received primary KA in the period from 2011 and 2 years earlier to data-extraction date. Patients will be identified from the DKR. Patients are followed for 2 years, until first revision, death or migration, whichever comes first.

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: * Primary knee arthroplasty due to osteoarthritis Exclusion Criteria: * Primary knee arthroplasty due to traumatic osteoarthritis.

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Conditions

The condition(s) this trial relates to.

osteoarthritis, knee Prosthesis Failure prosthesis-related infectious disease

As listed by the trial registrant

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

Arthritis knee Bariatric surgery candidate Prosthesis failure Prosthesis related infections Prosthesis survival

Contacts and locations

Locations

  • Orthopaedic department, Bispebjerg Hospital

    Copenhagen, Denmark

More trials for these conditions

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