Table 2 Self-reported KOOS data (n = 259) and objectively assessed physical function (n = 173) at first follow-up at a mean of 18 years post meniscectomy and change in these outcomes from first follow-up to second follow-up at a mean of 25 years post meniscectomy
Baseline mean (SD)p Value (Mann–Whitney)Change from first assessment adjusted for first assessment and follow-up time, mean (95% CI) ANCOVADifference (meniscectomised-reference group) in change adjusted for first assessment and follow-up time, mean (95% CI) ANCOVA
Reference groupMeniscectomy groupReference groupMeniscectomy group
Pain94 (12)84 (21)<0.001−1 (−6 to 4)−6 (−8 to −4)−5 (−10 to 0)
Symptoms93 (11)83 (18)<0.001−2 (−7 to 2)−5 (−6 to −3)−2 (−7 to 3)
ADL95 (12)86 (19)<0.001−2 (−6 to 2)−3 (−5 to −2)−2 (−6 to 3)
Sport/recreation86 (22)65 (32)<0.001−5 (−12 to 3)−7 (−10 to −4)−3 (−10 to 5)
QoL89 (18)72 (26)<0.001−1 (−7 to 5)−5 (−8 to −3)−4 (−11 to 2)
Number of knee−bendings/30 s31 (9)27 (11)0.020−4 (−7 to −2)−4 (−5,−2)1 (−3 to 4)
One-leg hop (cm)80 (30)88 (33)0.132−18 (−24 to −12)−29 (−32 to −25)−11 (−18 to −3)
  • ADL, activities of daily living; ANCOVA, analysis of covariance; KOOS, Knee injury and Osteoarthritis Outcome Score; QoL, quality of life.