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NCT03913442: CLOAK

Colchicine for the Treatment of Osteoarthritis of the Knee

Completed Phase 4 Results posted Last updated 3 February 2025
What this trial tests

Phase 4 trial testing Colchicine 0.8 mg or 0.6 mg orally once daily in Osteoarthritis in 120 participants. Completed in 11 January 2024.

Timeline
15 May 2019
Primary endpoint
11 January 2024
11 January 2024

Quick facts

Lead sponsorNYU Langone Health
PhasePhase 4
StatusCompleted
Study typeINTERVENTIONAL
Allocationrandomized
Designparallel
Maskingdouble
Primary purposetreatment
Enrollment120
Start date15 May 2019
Primary completion11 January 2024
Estimated completion11 January 2024
Sites1 location across United States

Drugs / interventions tested

Conditions studied

Sponsor

NYU Langone Health — full company profile →

Who can join

Adults 18 to 99, any sex, with Osteoarthritis or Osteo Arthritis Knee. Patients with the condition only — healthy volunteers not accepted.

Results — posted to ClinicalTrials.gov

Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.

Change in Visual Analog Scale (VAS) Pain Score Primary · Baseline, 3 Months

VAS is a tool widely used to measure pain. A patient is asked to indicate his/her perceived pain intensity (most commonly) along a 10 mm horizontal line, and this rating is then measured from the left edge (=VAS score). The total score range is 0 (no pain) to 10 (worst pain imaginable); the higher the score, the worse the pain.

GroupValue95% CI
Placebo-1.45± 2.45
Colchicine-1.16± 2.22
Change in the Knee Injury and Osteoarthritis Outcome Score (KOOS) Pain Score Secondary · Baseline, 3 Months

The KOOS survey is comprised of 42 questions. The questions are divided into 5 sub-categories: symptoms/stiffness (7 questions), pain (9 questions), function/daily living (17 questions), function/sports and recreational activities (5 questions), and quality of life (4 questions). The KOOS Pain Score refers to a specific subscale within the KOOS questionnaire that measures the severity of knee pain experienced by a patient, consisting of nine questions where each response is scored on a scale from 0 (no pain) to 4 (extreme pain), with a higher score indicating greater pain intensity; the overal

GroupValue95% CI
Placebo9.5± 20
Colchicine5.2± 19
Change in the KOOS Stiffness Score Secondary · Baseline, 3 Months

The KOOS survey is comprised of 42 questions. The questions are divided into 5 sub-categories: symptoms/stiffness (7 questions), pain (9 questions), function/daily living (17 questions), function/sports and recreational activities (5 questions), and quality of life (4 questions). Each item on the KOOS is scored on a scale from 0 (no problems) to 4 (extreme problems), and then the scores are calculated to generate a final score between 0 and 100. The KOOS stiffness score is a percentage from 0 to 100 that measures how much stiffness a patient experiences in their knee. A score of 0 indicates th

GroupValue95% CI
Placebo6.6± 15.7
Colchicine5.5± 19.1
Change in the KOOS Physical Function Score Secondary · Baseline, 3 Months

The KOOS's five patient-relevant dimensions are scored separately: Pain (9 items); Symptoms/Stiffness (7 items); Function, Daily Living (17 items); Function, Sports and Recreational Activities (5 items); Quality of Life (4 items). The KOOS Physical Function items are scored on a Likert scale from 0 to 4, with 0 indicating no problems and 4 indicating extreme problems. The scores for each dimension are then transformed to a scale from 0 to 100, where 0 represents extreme problems with knee function and 100 indicates no problems at all.

GroupValue95% CI
Placebo9.8± 17.6
Colchicine7.4± 17.5
Change in the KOOS Quality of Life Score Secondary · Baseline, 3 Months

The KOOS survey is comprised of 42 questions. The questions are divided into 5 sub-categories: symptoms/stiffness (7 questions), pain (9 questions), function/daily living (17 questions), function/sports and recreational activities (5 questions), and quality of life (4 questions). A KOOS Quality of Life score ranges from 0 to 100, where 0 represents the worst possible knee-related quality of life and 100 indicates no problems at all. A higher score indicates better quality of life related to the knee.

GroupValue95% CI
Placebo6.9± 22
Colchicine3.5± 15.8
Change in the KOOS Sports and Recreational Activities Secondary · Baseline, 3 Months

The KOOS's five patient-relevant dimensions are scored separately: Pain (9 items); Symptoms/Stiffness (7 items); Function, Daily Living (17 items); Function, Sports and Recreational Activities (5 items); Quality of Life (4 items). The KOOS Sports and Recreational Activities 9 items are scored on a Likert scale from 0 to 4, with 0 indicating no problems and 4 indicating extreme problems relating to sports and recreational activities. The scores are then transformed to a scale from 0 to 100, with 100 indicating no knee problems with sports and recreational activities and 0 indicating extreme kne

GroupValue95% CI
Placebo0.0± 25.8
Colchicine2.8± 19.4
Change in the KOOS Total Score Secondary · Baseline, 3 Months

The KOOS survey is comprised of 42 questions. The questions are divided into 5 sub-categories: symptoms/stiffness (7 questions), pain (9 questions), function/daily living (17 questions), function/sports and recreational activities (5 questions), and quality of life (4 questions). The total range for each sub-category is 0-100, making the total range for the whole survey 0-500. The higher the score, the worse the symptoms and pain/ higher difficulty in function.

GroupValue95% CI
Placebo6.5± 20.7
Colchicine4.9± 18.1
Number of Participants Who Used Acetaminophen or Other Medications for Pain Secondary · 6 weeks
GroupValue95% CI
Placebo15
Colchicine13
Number of Participants Who Used Acetaminophen or Other Medications for Pain Secondary · 3 Months
GroupValue95% CI
Placebo16
Colchicine12
Change in Number of Participants Who Used Acetaminophen or Other Medications for Pain Secondary · 6 weeks, 3 months
GroupValue95% CI
Placebo-1
Colchicine1
Change in Inflammatory Plasma Marker: Interleukin-1 Receptor Antagonist (IL-1Ra) Secondary · Baseline, 3 months
GroupValue95% CI
Placebo-66± 231.9
Colchicine-7.3± 194
Change in Inflammatory Plasma Marker: Prostaglandin E2 (PGE2) Secondary · Baseline, 3 months
GroupValue95% CI
Placebo100± 586.4
Colchicine72.4± 737.3

Adverse events — posted to ClinicalTrials.gov

Time frame: 3 months. Reporting threshold: 0%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

Placebo
Serious: 0/51 (0%)
Deaths: 0/51
Colchicine
Serious: 0/49 (0%)
Deaths: 0/49
Other adverse events (5 terms — click to expand)

ReactionSystemPlaceboColchicine
Loose stoolsGastrointestinal disorders
HeadacheGeneral disorders
Abdominal discomfortGastrointestinal disorders
Nausea/ VomitingGastrointestinal disorders
MyalgiaMusculoskeletal and connective tissue disorders

Data from ClinicalTrials.gov NCT03913442 adverse events section.

Sponsor's own description

This prospective, double-blinded, placebo-controlled, randomized trial will enroll 120 SKOA subjects at the NYU Center for Musculoskeletal Care. Patients meeting entry criteria will be randomized 1:1 to treatment with colchicine or placebo daily for 3 months. Subjects will have detailed evaluation of standardized clinical pain outcomes, candidate peripheral blood biomarkers, baseline knee radiographs as well as MSK-US, and a subset will undergo evaluation of their synovial fluid.

Publications & conference data

4 peer-reviewed publications reference this trial (live from Europe PMC):

  1. Osteoarthritis Pain.
    Yu H, Huang T, Lu WW, Tong L, et al · · 2022 · cited 93× · PMID 35563035 · DOI 10.3390/ijms23094642
  2. Of mice and men: converging on a common molecular understanding of osteoarthritis.
    Vincent TL. · · 2020 · cited 59× · PMID 32989436 · DOI 10.1016/s2665-9913(20)30279-4
  3. Current Models for Development of Disease-Modifying Osteoarthritis Drugs.
    Makarczyk MJ, Gao Q, He Y, Li Z, et al · · 2021 · cited 50× · PMID 33403944 · DOI 10.1089/ten.tec.2020.0309
  4. Pharmaceutical therapeutics for articular regeneration and restoration: state-of-the-art technology for screening small molecular drugs.
    Chen Y, Sun H, Yao X, Yu Y, et al · · 2021 · cited 9× · PMID 34783870 · DOI 10.1007/s00018-021-03983-8

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Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT03913442.

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing