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| Name | Class |
|---|---|
| The Arthritis Society, Canada | OTHER |
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People with knee arthritis often experience constant pain, and current treatments aren't very effective. This can lead to limited movement and more health problems. Knee arthritis is a big part of healthcare costs in Canada, and its pain is a major reason people see doctors. The pain is linked to complex nervous system changes, making current treatments, like exercise, not very successful.
To address this, researchers suggest a new approach combining two things: a brain stimulation technique called Transcranial Direct Current Stimulation (tDCS) and yoga. TDCS helps with pain by changing how the brain works, and yoga, a safe practice, focuses on overall well-being. Together, the investigators aim to improve how the nervous system works from top to bottom.
The research project wants to change how the arthritis pain is being managed by focusing on how it works. The investigators plan to test this combo in a study comparing real tDCS plus yoga with fake tDCS plus yoga. The investigators will look not only at pain but also at other measures related to pain and how the nervous system works. This new mix could be a meaningful way to reduce pain for people with knee arthritis.
Background:
'Omnipresent' is a common word that people living with knee osteoarthritis (KOA) use to describe the associated pain, with its unpredictability causing physical, social and emotional disruption. For many, KOA pain leads to limited mobility, reduced quality of life and increased healthcare costs KOA pain and its mechanisms are known to be complex, with alterations in nervous system signaling (ANSS) leading to persistent pain, and treatment failure to guideline-based care. Unfortunately, there is a lack of effective conservative treatments for KOA pain, including exercise which elicits only modest analgesic effects and has little impact on ANSS. To improve conservative pain management for people with KOA, it is imperative to design mechanism informed interventions and explore bold new ways to modulate ANSS to optimize patient outcomes.
The investigators' novel intervention is focused on addressing the biomarker of ANSS. The investigators' solution involves using non-invasive brain stimulation (NIBS) in the form of transcranial direct current stimulation (tDCS), paired with the mind-body practice of yoga, to modify neural pathways. This is a promising and safe alternative to medications - which risk habituation, adverse events, and addiction - and that builds on the limited efficacy of performing/examining exercise in isolation. To the investigators' knowledge, this is the first trial to use this combination for chronic pain and in people with KOA. The investigators have chosen this combination as tDCS has the potential to produce synergistic nervous system effects with yoga and bolster impacts on pain.
tDCS alleviates pain in older adults with KOA, particularly when combined with strengthening exercise or mindfulness. tDCS has demonstrated improved efficiency of conditioned pain modulation (CPM) resulting in pain reduction in older adults with KOA displaying deficient CPM. Meta-analyses of tDCS for the treatment of chronic pain report small to moderate effects on pain reduction, while a meta-analysis of NIBS (including tDCS) plus exercise showed moderate to large effect sizes (-0.62) compared to sham NIBS plus exercise.
The investigators' approach combining 13 sessions of tDCS with yoga provides the benefits of strengthening and mindfulness in addition to nervous system regulation with the potential to produce large effects for pain reduction.
Yoga modulates brain networks and is safe and accessible for many with KOA Importantly, yoga is safe for people with comorbidities through its combination of physical postures, breathing exercises, meditation and relaxation that are hypothesized to reduce pain by regulating top down and bottom-up input into the physiological systems modulating nociceptive signals. Evidence from fMRI studies indicates that yoga modifies functional connectivity in networks involved in chronic pain. Yoga is conditionally recommended by KOA guidelines due to low quality evidence and few studies.
The current project seeks to shift the current paradigm for conservative pain management for people with KOA by assessing a pain mechanism informed treatment strategy in a multi-center pilot and feasibility randomized controlled trial. The investigators hypothesize that real tDCS and yoga will provide clinically meaningful reductions in pain compared to sham tDCS and yoga.
This is a feasibility and pilot double-blind, randomized sham-controlled multi-center, two-arm clinical trial with a 1:1 allocation ratio. Participants will be randomized to receive active or sham tDCS and yoga for 9 weeks. Follow-up will occur at the end of the intervention and at 3 months. The Conceptual Framework for Defining Feasibility and Pilot studies, and the Standard Protocol Items- Recommendations for Intervention Trials will be used. Study results will be reported using the extended CONSORT guideline for pilot trials and the Check List Standardizing the Reporting of Interventions For Yoga (CLARIFY).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Active tDCS | Experimental | Active tDCS Arm: In Week 1, participants in the Active tDCS arm will undergo five in-person visits for the administration of active transcranial Direct Current Stimulation (tDCS). Subsequently, from Weeks 2 to 9, participants will receive weekly active tDCS sessions preceding the scheduled yoga sessions. For the active tDCS sessions, a constant current stimulator will be employed to deliver direct current through a pair of surface sponge electrodes (5×7 cm) soaked in saline. Participants will undergo anodal stimulation targeting the primary motor cortex (M1) contralateral to the most painful site (C3 or C4 based on the electroencephalogram 10/20 system). The cathodal electrode will be positioned on the supraorbital area contralateral to the anode. During active tDCS, a constant anodal current of 2 mA will be administered for 20 minutes, a duration known to enhance cortical excitability and alleviate pain. T |
|
| Sham tDCS | Sham Comparator | Sham tDCS Arm: tDCS: In Week 1, participants in the Sham tDCS arm will attend five in-person visits for the administration of sham transcranial Direct Current Stimulation (tDCS). From Weeks 2 to 9, participants will receive weekly sham tDCS sessions before the scheduled yoga sessions. Constant current stimulator will be used to deliver direct current through a pair of surface sponge electrodes (5×7 cm) soaked in saline. Participants will undergo sham stimulation targeting the primary motor cortex (M1) contralateral to the most painful site (C3 or C4 based on the electroencephalogram 10/20 system). During sham tDCS, the electrodes will be placed in the same montage as the active tDCS; however, current will only be applied for the initial and final 30 seconds of the 20-minute session. Consequently, participants will experience the sensation of current ramping up and down but will receive no current for the remaining stimulation period. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Yoga | Procedure | Yoga program: In weeks 2-9, participants will attend twice weekly 1-hour sessions of yoga led by a certified yoga instructor trained in the intervention by collaborator Pearson. Videos will be provided for completion of home sessions. The yoga program is based on the Pain Care Aware certification program.38 Details of the program as well as the training of instructors are provided in the appendices. Briefly, classes will consist of 3 parts: centring and warming up aimed at regulating physiology prior to beginning the yoga postures; yoga postures and guided relaxation. |
| Measure | Description | Time Frame |
|---|---|---|
| Percentage of complete follow up | Percentage rate measured by those at baseline completing study follow up measures | 9 weeks and 3 months |
| Measure | Description | Time Frame |
|---|---|---|
| Brief Pain Inventory - Numeric Rating Scale | The BPI uses 4 questions to ask about worst and least pain intensity in the past 24 hours, pain on average and pain right now. Questions are rated on an 11-point scale where patients select a rating between 0-10 with zero representing 'no pain' and 10 representing the 'worst imaginable pain'. The Numeric Rating Scale is reported to have excellent inter-rater reliability and acceptable validity in people with KOA. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Lisa Carlesso, PhD | Contact | 2896805640 | carlesl@mcmaster.ca | |
| Guillaume Leonard, PhD | Contact | (819) 780-2220 | 45246 | Guillaume.Leonard2@USherbrooke.ca |
| Name | Affiliation | Role |
|---|---|---|
| Lisa Carlesso, PhD | McMaster University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| McMaster University | Recruiting | Hamilton | Ontario | L8S1C7 | Canada |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 31551381 | Background | Wallis JA, Taylor NF, Bunzli S, Shields N. Experience of living with knee osteoarthritis: a systematic review of qualitative studies. BMJ Open. 2019 Sep 24;9(9):e030060. doi: 10.1136/bmjopen-2019-030060. | |
| 29157670 | Background | Calders P, Van Ginckel A. Presence of comorbidities and prognosis of clinical symptoms in knee and/or hip osteoarthritis: A systematic review and meta-analysis. Semin Arthritis Rheum. 2018 Jun;47(6):805-813. doi: 10.1016/j.semarthrit.2017.10.016. Epub 2017 Oct 31. |
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| ID | Term |
|---|---|
| D020370 | Osteoarthritis, Knee |
| ID | Term |
|---|---|
| D010003 | Osteoarthritis |
| D001168 | Arthritis |
| D007592 | Joint Diseases |
| D009140 | Musculoskeletal Diseases |
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| ID | Term |
|---|---|
| D015013 | Yoga |
| ID | Term |
|---|---|
| D026441 | Mind-Body Therapies |
| D000529 | Complementary Therapies |
| D013812 | Therapeutics |
| D026443 | Spiritual Therapies |
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|
| 9 weeks and 3 months |
| Modified Charlson Comorbidity Index (CCI) | To assesses the presence of 19 comorbidities in participants. The CCI has been used in many patient populations including knee osteoarthritis | 9 weeks and 3 months |
| Endogenous pain modulation | CPM will be assessed in the following steps: 1) at the anterior shin on the unaffected knee, an ascending measure of pressure pain threshold (PPT) will be evaluated, inducing a pain rating of 3/10. 2) At the opposite volar forearm, a conditioning stimulus in the form of forearm ischemia using a blood pressure cuff and squeezing a stress ball until a pain rating of 5/10 is reached, 3) PPT at the anterior shin will be repeated with the cuff remaining inflated2, 4) an index will be created by calculating the percent efficiency of CPM (%CPM) as PPT2/PPT1, multiplied by 100; whereby %CPM ≤ 100 indicates inefficient pain modulation. CPM testing has demonstrated good intra-session reliability. | 9 weeks |
| Pain interference | The Brief Pain Inventory5 assesses pain interference through 7 items general activity, mood, walking, normal work, relations with others, sleeping, enjoyment of life rated from 0 (does not interfere) to 10 (completely interferes). | 9 weeks and 3 months |
| Pain catastrophizing | Pain Catastrophizing Scale (PCS); The PCS is a 13-item self-reporting instrument for catastrophizing in the context of actual or anticipated pain, with higher scores indicating higher pain catastrophizing. The validity of the PCS for measuring pain catastrophizing in people with KOA has been reported. | 9 weeks and 3 months |
| Hospital Anxiety and Depression Scale (HADS) | The HADS is a brief and reliable measure of emotional distress in general in chronic populations. Validity and reliability of the HADS have been previously established. Higher scores on the HADS indicate increased severity of anxiety and depression symptoms. | 9 weeks and 3 months |
| Knee Injury and Osteoarthritis Outcome Score (KOOS) | The KOOS pain and function in daily living and QoL subscales will be used to assess self-reported opinions about patients' knee and associated problems. Scores range from 0-100 with zero representing extreme knee problems and 100 representing no knee problems. KOOS has adequate internal consistency and validity in people with KOA. | 9 weeks and 3 months |
| Multi-joint pain; Body diagram | Participants will be asked to indicate any other areas where they experience pain (e.g., neck, shoulders, back) on a body diagram which will be summed to form a count. Body diagrams are a reliable method for indication of painful body parts. | 9 weeks and 3 months |
| Knee Awareness | Fremantle knee awareness questionnaire; Developed from the low back version, the scale has good reliability and is correlated with pain in motion, disability, catastrophizing, fear of movement, and anxiety. It consists of 9 items rated from never to always. Higher scores indicate lower knee awareness. | 9 weeks and 3 months |
| Functional leg strength | Stair climb test; The OARSI recommended test will measure the time (in seconds) it takes to ascend and descend a flight of stairs consisting of 9 steps and a handrail. The test has excellent reliability and responsiveness. | 9 weeks |
| Medication use | Survey question; Participants will be asked to indicate use of any SSRI or SNRI medication that they take regularly and which can impact neuromodulation. Use of these medications will be adjusted for in our model | 9 weeks and 3 months |
| Adverse events | Survey question; We will monitor adverse events related to tDCS using the following questionnaire: Do you experience any of the following symptoms or side-effects? Headache Neck pain Scalp pain Tingling Itching Burning sensation Skin redness Sleepiness Trouble concentrating Acute mood change Others (specify) rated as absent, mild, moderate or severe and then If present: Is this related to tDCS? (1, none ; 2, remote; 3, possible; 4, probable; 5, definite). We will also monitor adverse events related to yoga by asking the participants to report any problems that they experience after the yoga class that last for more than two days and/or urged them to seek treatment or if they experience any adverse events during the class (such as falls or injuries) | 9 weeks |
| Patient global impression of change | At the end of the program, participants will be asked to rate the amount of change on a 7 point scale experienced ranging from very much improved to very much worse. The scale is widely used and validated as a measure of minimally important change | 9 weeks and 3 months |
| Blinding effectiveness | Participants will be asked to indicate which intervention group they believed they were in. | 3 months |
| Usefulness of the program for managing knee OA measured on a 5 point Likert scale | Likert scale anchored from Not useful at all to very useful | 9 weeks |
| Frequency of the program measured on a 5 point Likert scale | Likert scale anchored from not frequent enough to Frequent enough | 9 weeks |
| Duration of the program on a 5 point Likert scale | Likert scale anchored from not long enough to long enough | 9 weeks |
| Acceptability of the delivery of the brain stimulation on a 5 point Likert scale | Likert scale anchored from not at all accepted to very acceptable | 9 weeks |
| Acceptability of the delivery of the yoga session of the program on a 5 point Likert scale | Likert scale anchored from not at all accepted to very acceptable | 9 weeks |
| How likely are you to recommend the program you attended for others with knee OA? | Likert scale anchored from not at all likely to very likely | 9 weeks |
| How burdensome did you find completing the questionnaires? | 10 point scale- burdensomeness rating between 0 (no burden at all) to 10 (very much a burden) | 3 months |
| How burdensome did you find completing the physical assessments? | 10 point scale- burdensomeness rating between 0 (no burden at all) to 10 (very much a burden) | 9 weeks |
| rate of adherence measured by percentage of sessions attended and home sessions completed | adherence rate calculated from attendance and exercise tracking sheets | 9 weeks |
| University of Western Ontario | Recruiting | London | Ontario | N6A 3K7 | Canada |
|
| Université de Sherbrooke | Recruiting | Sherbrooke | Quebec | J1K 2R1 | Canada |
|
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| D012216 |
| Rheumatic Diseases |
| D026241 |
| Exercise Movement Techniques |
| D026741 | Physical Therapy Modalities |