Table 2 Test-retest reliability of the simplified Chinese KOOS in five subscales (n = 128 patients, separated with an interval 5–7 days)

First assessment (mean ± SD)

59.97 ± 18.33

61.45 ± 20.26

66.52 ± 21.31

42.30 ± 27.26

47.45 ± 18.81

 s assessment (mean ± SD)

63.45 ± 18.15

62.95 ± 18.44

68.00 ± 19.61

45.70 ± 24.61

52.15 ± 16.61

ICC (3,1)

0.926

0.914

0.976

0.946

0.808

95% CI

0.906–0.944

0.890–0.934

0.970–0.982

0.931–0.959

0.753–0.854

P

< 0.001

< 0.001

< 0.001

< 0.001

< 0.001