Your phone could spot knee arthritis before it's too late
NCT ID NCT07580222
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study is testing whether a smartphone app can detect early knee osteoarthritis by measuring how the knee moves during simple activities like walking. Researchers will compare the app's results to standard motion-capture equipment and patient symptoms. If it works, this could lead to earlier diagnosis and better care for knee arthritis.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- smartphone-based motion capture (OpenCap)
- What this could lead to
- If successful, this could provide a simple, accessible way to diagnose knee osteoarthritis earlier, potentially improving treatment timing and outcomes.
- What could go wrong
- This is a small, early-stage study with only 47 participants. The smartphone method may not be accurate enough compared to standard lab equipment, and 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.
- Participants
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About 47 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Apr 2026
- Expected to finish
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Mar 2028
An estimate. End dates often move.
- Lead sponsor
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A government agency
The lead sponsor is a US federal agency other than the NIH.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Individuals who were diagnosed with early knee osteoarthritis and had a history of being elected to receive injection treatment
- Ages
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30 years and older
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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: * Veteran and non-Veterans * males and females * diagnosed with early knee osteoarthritis * qualified for and participated in the Precision Assessment of Platelet Rich Plasma for Joint Preservation study (ClinicalTrials.gov ID: NCT03460236) * able and willing to provide informed consent for follow-up study Exclusion Criteria: * symptomatic OA in joints other than the knee in the lower body * joint replacement * rheumatic disease * BMI \> 35 kg/m\^2 * severe systematic disease defined as American Society of Anesthesiologists (ASA) 3 or above * pregnant or intending to become pregnant during the study
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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VA Palo Alto Health Care System, Palo Alto, CA
RECRUITINGPalo Alto, California, 94304-1207, United States
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