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Massive medicare study aims to improve joint replacement safety

NCT ID NCT02281747

Knowledge-focused Sponsor: National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Sep 02, 2026 · Updated 8 times

Summary

This study looks at records from over 500,000 Medicare beneficiaries with rheumatoid arthritis or ankylosing spondylitis who had major orthopedic procedures like joint replacements or spine surgery between 1999 and 2015. Researchers want to understand how often complications happen and whether care has improved over time. The goal is to find ways to reduce risks and improve outcomes for people undergoing these surgeries.

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 research could identify ways to improve care before and after orthopedic surgeries, potentially reducing complications and improving outcomes for people with arthritis.
What could go wrong
This is an observational study using existing data, not a clinical trial testing a new treatment. It cannot prove cause and effect, and findings may not apply to all patient groups.

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

521,292 people

The number who actually took part.

Started

Oct 2014

Expected to finish

May 2029

An estimate. End dates often move.

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

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

Who is studied

Medicare (1999 to 2015) and Medicaid (1999 to 2015) beneficiaries

Ages

20 to 100 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.

* Subjects will be either Medicare or Medicaid beneficiaries with available claims from 1999 to 2015. For projects requiring detailed medication information, inclusion will be limited to those with Part D claims from 2006 to 2015. Eligibility for each project will be based on claims for the appropriate disease (e.g. RA) or procedure (e.g. hip arthroplasty). Medicare beneficiaries will be excluded (or censored) if they do not have both Part A and Part B coverage, or enrolled in Medicare Advantage plans (Part C), as detailed claims for these beneficiaries are not available. We will also exclude dual-eligible (Medicare and Medicaid recipients) as these subjects have distinct clinical conditions (e.g. blindness) that distinguishes them from most Medicare beneficiaries. There will be no exclusions based on gender, race, ethnicity, or cognitive impairment.

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Conditions

The condition(s) this trial relates to.

ankylosing spondylitis rheumatoid arthritis

As listed by the trial registrant

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

Ankylosing spondylitis Rheumatoid arthritis

Contacts and locations

Locations

  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), 9

    Bethesda, Maryland, 20892, United States

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