 Outcome measures
Osteoarthritis, Knee Injury, pain, KOA
CHRONIC PAIN, SECONDARY, OSTEOARTHRITIS
 The primary outcome was the Knee Injury and Osteoarthritis Outcome Score (KOOS). It is a self-administered questionnaire to evaluate participants’ views on their knees and associated problems with KOA. On the other hand, the secondary outcomes were the visual analogue scale (VAS) for pain and the timed up-and-go test (TUG). The pain VAS is a valid tool with excellent test-retest reliability (an intraclass correlation coefficient of 0.97) to evaluate chronic pain in clinical practice.