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Can sleep and activity predict satisfaction after Same-Day knee replacement?

NCT ID NCT07840391

Knowledge-focused Sponsor: Turku University Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 25, 2026 · Last updated Sep 25, 2026

Summary

Researchers at Turku University Hospital are following 120 people who have same-day discharge knee replacement for osteoarthritis. Participants wear an accelerometer to measure physical activity and sleep, complete questionnaires about knee function, pain, and quality of life, and have knee strength and motion tested before and 12 months after surgery. The study compares outcomes between two types of knee replacement, partial (medial UKA) and total (TKA), and looks at how changes in activity, sleep, and strength relate to each other and to patient satisfaction.

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 the study finds links between activity, sleep, and satisfaction, it could help doctors tailor recovery advice and set expectations for same-day knee replacement.
What could go wrong
This is an observational study, so it can show patterns but not prove cause and effect. Results may not apply to patients with different health profiles or to other hospitals.

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

About 120 people

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

Started

Aug 2025

Expected to finish

Feb 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.

Who is studied

The study population consists of patients undergoing same-day discharge primary knee arthroplasty: medial UKA or TKA according to standard clinical practice at Turku University Hospital. The choice of procedure is made on clinical grounds by the treating surgeon and is not influenced by study participation. Operations are performed by experienced arthroplasty surgeons under spinal anaesthesia following the hospital's standardized same-day discharge protocol.

Ages

Up to 80 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: \- Primary knee osteoarthritis: medial or lateral Kellgren Lawrence grade 3-4 for TKA and antero-medial grade 3-4 for UKA. Patient criteria for outpatient knee arthroplasty (UKA or TKA): * Full overnight support by an adult at home after discharge * At most mild, well-controlled, comorbidities (e.g. hypertension, hypothyroidism, epilepsy, asthma) * ASA-class 1-2 * Age \<80 years * BMI \<35 kg/m2 Exclusion Criteria: * Post-traumatic osteoarthritis * Neurological disorder aVecting walking or muscle strength * Inability or unwillingness to use a smartphone or to participate in the study Exclusion criteria for outpatient surgery: * History of cardiac or cerebrovascular events * Conditions affecting consciousness (e.g. syncope of cardiac origin) * Untreated or central sleep apnoea * Heart failure * Diabetes mellitus type 1 * Cognitive impairment or dementia * History of substance abuse * Chronic strong opioid therapy or severe pain disorder * Antithrombotic therapy (e.g. Xarelto, Pradaxa, Plavix or ASA for secondary prevention) * History of venous thromboembolism or known coagulopathy

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Conditions

The condition(s) this trial relates to.

arthropathy Motor Activity osteoarthritis osteoarthritis, knee

As listed by the trial registrant

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

Arthrosis

How to take part

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

  1. The places running it

    2 sites. 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

  • The UKK Institute for Health Promotion Research

    RECRUITING

    Tampere, Finland

  • Turku University Hospital

    RECRUITING

    Turku, Finland

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