Reliability, validity, responsiveness, and minimum important change of the Stair Climb Test in adults with hip and knee osteoarthritis.

The 6-step timed SCT adequately assesses the construct of physical function in individuals with hip or knee osteoarthritis with excellent 12-week test-retest reliability. However, support for its responsiveness was inadequate to recommend its use as an outcome measure in people with osteoarthritis for research and clinical practice.