Table 4 The KSS in the two groups

 Preop

36.5 ± 4.8

36.7 ± 5.4

0.681

 Postop 1 month

71.6 ± 5.7

68.2 ± 6.5

0.032

 Postop 6 months

76.3 ± 4.9

73.6 ± 6.2

0.037

 Postop 12 months

81.6 ± 5.9

80.4 ± 5.7

0.087

 Postop 24 months

89.6 ± 3.2

88.4 ± 3.9

0.661

 Postop 36 months

93.3 ± 4.1

92.2 ± 4.8

0.783

 Preop

38.4 ± 3.9

37.2 ± 5.4

0.783

 Postop 1 month

65.1 ± 5.9

61.2 ± 6.1

0.022

 Postop 6 months

71.4 ± 4.8

67.1 ± 5.2

0.033

 Postop 12 months

74.1 ± 3.1

73.4 ± 4.7

0.061

 Postop 24 months

82.2 ± 3.6

81.6 ± 3.3

0.511

 Postop 36 months

85.1 ± 3.7

84.1 ± 3.2

0.685