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Osteo Arthritis KneeNCT06701461

Measurement of Osteoarthritic Patient Pain Through Electrodermal Activity Signals

A study testing Electrodermal Activity signal in people with Osteo Arthritis Knee, run by Dartmouth-Hitchcock Medical Center at 1 site in United States.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
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Trial summary

This pilot study aims to investigate the viability of using a smartwatch-based electrodermal activity (EDA) sensor to capture enough EDA signal to quantitatively assess pain in osteoarthritis subjects and test the feasibility of its methods and procedures for later use in subsequent larger-scale studies. Read more about this study

Who is it for?
Ages 50 to 80 yearsHealthy volunteers can take part
Conditions the study is for
Osteo Arthritis Knee
What is being tested?
Electrodermal Activity signal
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
15 participants
Where
1 siteUnited States
Study dates
Aug 2026to Oct 2026
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 50 to 80 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Kellgren-Lawrence Grade >= 3

Who cannot join

  • Inflammatory arthropathy (e.g., rheumatoid arthritis), BMI >=35
  • Control subjects:
  • Complaints of lower extremity joint pain
  • Known diagnosis of knee osteoarthpathy
  • Prior history of knee surgery, knee injections, or injury to knee joints (e.g., meniscus tears, ligamentous injuries), BMI >=35
  • Both groups, exclusion:
Show all 19Show fewer
  • Subjects with chronic heart problems, including, but not limited to, chronic hypertension, heart palpitations, a weak or irregular heartbeat, or a previous heart attack,
  • Subjects taking the following drugs within 12 hours of the experiment or during the experiment: caffeine, alcohol, psychoactive drugs, nicotine or marijuana, other recreational drugs, and medicine of any kind that is not normally taken daily. Such medications include;
  • NSAIDs
  • Acetaminophen
  • Steroidal anti-inflammatory agents
  • Bronchodilators
  • Appetite suppressants
  • Lipase inhibitors
  • Women who are currently pregnant
  • Subjects with Raynaud's syndrome
  • Subjects with any of the following conditions: active skin lesions where EDA sensors are, vertigo or dizziness, and anyone with postural orthostatic tachycardia syndrome (POTS), peripheral neuropathy, seizure disorders, methicillin-resistant staphylococcus aureus (MRSA), impaired circulation, medical implants, open skin lesions, chronic eczema on hands where EDA and electrical stimulator's electrodes are attached, diabetes, and epilepsy.
  • Participants who have a skin sensitivity to metals, have a pacemaker or defibrillator, or have recent head trauma within the past two weeks (even without loss of consciousness)
  • Participants who cannot feel physical pain or have a history of self-harm

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

United States1 site
  • Dartmouth-Hitchcock Medical Center

    Lebanon, New Hampshire, 03756

    Jon M Coordinator, MD, MS, 603-653-3306, jon.mikael.anderson@hitchcock.org

    Peter L Schilling, MD, MS

Other trials in United States

About this study

This pilot study aims to investigate the viability of using a smartwatch-based electrodermal activity (EDA) sensor to capture enough EDA signal to quantitatively assess pain in osteoarthritis subjects and test the feasibility of its methods and procedures for later use in subsequent larger-scale studies.

Read the detailed description

Chronic pain, a disease in its own right, afflicts one in three adults in the US and poses an enormous economic burden ($560-$635 billion annually), more than heart disease, cancer, and diabetes. To treat pain, doctors often prescribe opioids to suffering patients. Paradoxically, prescription opioid abuse has become a national epidemic, costing $500 billion annually in medical, economic, social, and criminal ramifications. However, the development of effective treatment for chronic pain is hampered by the lack of a reliable biomarker that can quantify the level of pain and detect any attenuation after treatment. This is reflected in the failed statistical significance in many clinical trials of drugs for managing chronic pain (e.g., ONO-2952 and Ibodutant) or a large enrollment number being required to reveal significant but small effects (e.g., 1,798 enrollments for the trial on Renzapride).

Dysfunction of the autonomic nervous system (ANS) has been linked with many chronic pain conditions. The ANS is the primary pathway in brain-gut communication and manifests the body's emotional and psychological states. This makes it particularly relevant to pain, which has a strong emotional component. The ANS includes the sympathetic (SNS) and parasympathetic nervous systems (PNS), and chronic pain conditions reportedly correlate with an unchecked predominance of SNS activity and desensitized PNS. Thus, the PNS and SNS are promising targets for developing sensitive and robust biomarkers for chronic pain.

The investigators will leverage the EmbracePlus smartwatch for the non-invasive quantification of both SNS and PNS activities with time- and frequency-domain analysis of EDA. In this proposed pilot study, the investigators aim to establish whether this biomarker for quantifying pain levels shows promise for osteoarthritis patients when detected through a smartwatch. This is intended to be preliminary work to support a grant application for a more extensive study. In this work, the investigators will collect EDA measurements across up to 15 subjects (2/3 with symptomatic osteoarthritis (Kellgren-Lawrence grade \>= 3) and 1/3 control). Each participant's baseline response will first be measured using a thermal grill (a research device commonly used to induce a painful stimulus without injury). Participants will also report their results using a VAS. Then, Participants will be put through three OARSI standardized functional tests: the 30-second chair test, the 40m fast-paced walk, and the stair climb test. During these tests, subjects will receive a handheld clicker to mark moments of their sharpest pain. The results of each test will then be analyzed through a set of time- and frequency-domain analyses of the recorded bio-signals to extract key parameters and measure how well EDA signal detection captured both sharp and dull pain in subjects.

If effective, this method can be particularly useful. Existing commercial wearable sensors can collect patient data for a week at a time. This would allow for the collection of in-vivo and continuous patient pain data, which could greatly enhance the understanding of patient pain both pre- and post-treatment.

Being tested
Electrodermal Activity signal
Keywords
Pain, Electrodermal Activity Signals, Osteoarthritis, Knee
Medical subject headings
Pain, Osteoarthritis

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Electrodermal Activity signalDevice

    Determining if the electrodermal activity signals, as measured by the Embrace Plus smartwatch) can be used to measure osteoarthritic patient pain levels.

Study groups in NCT06701461
Study groupRoleWhat they receive
Electrodermal Activity Measurement SubjectsExperimentalParticipants will have their baseline electrodermal activity (EDA) response to pain measured as well as their EDA response measured while participating in a set of standardized functional tests.
Receives: Device: Electrodermal Activity signal

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. :Difference in pain measurements as reported by the participant via a visual analogue scale versus smartwatch reported electrodermal activity sensors

    As a pilot study, the goal is not hypothesis testing but rather examining the feasibility of this approach to measuring patient pain in osteoarthritic patients. Thus, the statistical analysis will be primarily descriptive. The baseline experiment is being done to see whether the smartwatch measurements are at all comparable to prior similar experiments using the thermal grill (Posada-Quintero 2016; Posada-Quintero 2021). For this reason, though not typical for a pilot study, participant responses to the baseline test will use similar analysis to prior electrodermal activity (EDA) based thermal grill studies to see if the smartwatch poses a viable EDA signal collection source. This primarily consists of repeated measures analysis of variance (ANOVA) comparing patient-reported visual analog scale (VAS) scores to EDA output.

    Measured: 40 minutes of test time, occurring all in one day.

  2. Patient-reported pain during standardized Osteoarthritis Research Society International (OARSI) 30-second chair test

    Patients will be asked to participate in the standardized OARSI 30-second chair test. During the OARSI functional tests, the timestamps of patient reports of pain will be recorded by the experimenter.

    Measured: 5 minutes

  3. Electrodermal activity (EDA) signals during standardized Osteoarthritis Research Society International (OARSI) 30-second chair test

    A smartwatch will capture the patient's EDA signals during the 30-second chair test

    Measured: 0 minutes. Concurrent with measurement of patient-reported pain.

  4. Patient-reported pain during standardized Osteoarthritis Research Society International (OARSI) 40m fast-paced walk test

    Patients will be asked to participate in the standardized OARSI 40m fast-paced walk test. During the OARSI functional tests, the timestamps of patient reports of pain will be recorded by the experimenter.

    Measured: 10 minutes

  5. Electrodermal activity (EDA) signals during standardized Osteoarthritis Research Society International (OARSI) 40m fast-paced walk test

    A smartwatch will capture the patient's EDA signals during the 40m fast-paced walk test

    Measured: 0 minutes. Concurrent with measurement of patient-reported pain.

  6. Patient-reported pain during standardized Osteoarthritis Research Society International (OARSI) stair climb test

    Patients will be asked to participate in the standardized OARSI stair climb test. During the OARSI functional tests, the timestamps of patient reports of pain will be recorded by the experimenter.

    Measured: 10 minutes

  7. Electrodermal activity (EDA) signals during standardized Osteoarthritis Research Society International (OARSI) stair climb test

    A smartwatch will capture the patient's EDA signals during the stair climb test

    Measured: 0 minutes. Concurrent with measurement of patient-reported pain.

  8. Accuracy of predicting patient pain from electrodermal activity signal (EDA) during standardized Osteoarthritis Research Society International (OARSI) function tests

    We will treat the processed EDA signal as a binary classifier (i.e., prediction of pain or no pain at any given moment). The accuracy of these predictions will be calculated against the actual patient-reported pain.

    Measured: 0 minutes. Done after all data has been collected.

  9. Percentage of correctly identified pain events (Sensitivity) as measured by the smartwatch (True positive events)

    In these tests, we will treat the processed EDA signal as a binary classifier (i.e., prediction of pain or no pain at any given moment). The sensitivity of these predictions will be calculated against the actual patient-reported pain.

    Measured: 0 minutes. Done after all data has been collected.

  10. Percentage of correctly identified non-pain events (Specificity) as measured by the smartwatch (True negative non-events)

    In these tests, we will treat the processed EDA signal as a binary classifier (i.e., prediction of pain or no pain at any given moment). The specificity of these predictions will be calculated against the actual patient-reported pain.

    Measured: 0 minutes. Done after all data has been collected.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted22 Nov 2024
  2. Study startAug 2026 (estimated)
  3. Primary completionSep 2026 (estimated)
  4. Study completionOct 2026 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Diagnosis
Allocation
Not applicable
Intervention model
Single group
Model description
This preliminary study will look at the predictive effectiveness of the measured biomarker across a small group of patients with osteoarthritis and a small control group of patients without osteoarthritis.
Masking
None (open label)
Enrolment
15 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06701461
Sponsor's protocol ID
STUDY02002493
Status last verified
Apr 2025
First submitted
15 Nov 2024
Last updated
6 Mar 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
Individual data sharing
No

Publications

  • Posada-Quintero HF, Florian JP, Orjuela-Canon AD, Chon KH. Highly sensitive index of sympathetic activity based on time-frequency spectral analysis of electrodermal activity. Am J Physiol Regul Integr Comp Physiol. 2016 Sep 1;311(3):R582-91. doi: 10.1152/ajpregu.00180.2016. Epub 2016 Jul 20.

    PubMed 27440716
  • Posada-Quintero HF, Kong Y, Chon KH. Objective pain stimulation intensity and pain sensation assessment using machine learning classification and regression based on electrodermal activity. Am J Physiol Regul Integr Comp Physiol. 2021 Aug 1;321(2):R186-R196. doi: 10.1152/ajpregu.00094.2021. Epub 2021 Jun 16.

    PubMed 34133246

Questions about this trial

What is this clinical trial studying?

A study testing Electrodermal Activity signal in people with Osteo Arthritis Knee, run by Dartmouth-Hitchcock Medical Center at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 19 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: opening soon, as of the sponsor's last update on 6 Mar 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Jon M Coordinator, MS (603-650-3306, jon.mikael.anderson@hitchcock.org), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

:Difference in pain measurements as reported by the participant via a visual analogue scale versus smartwatch reported electrodermal activity sensors (time frame: 40 minutes of test time, occurring all in one day.). The study lists 10 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06701461, which also lists 2 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Mar 2026.

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