Change in KOOS pain score at six weeks. The individual change in KOOS pain at 6 weeks compared to baseline ranged from improvement to worsening, in both exercise and control group. A change of 10 points or more is considered clinically significant . A similar pattern was seen for all KOOS and SF-36 subscales.
Thorstensson et al. BMC Musculoskeletal Disorders 2005 6:27 doi:10.1186/1471-2474-6-27