Table 2 Reported KSS and OKS based on different HKA and FTA values

Gill (2021) [6]

TFA^b

-10° to -7.5°

1 (0.5%)

90.0

100.0

-7.5° to -5°

4 (1.8%)

92.7 ± 10.0

94.3 ± 3.8

-5° to -2.5°

33 (14.8%)

97.5 ± 4.4*

96.3 ± 5.1

-2.5° to 0°

65 (29.1%)

96.0 ± 6.0*

96.2 ± 9.2

0° to 2.5°

71 (31.8%)

93.8 ± 8.9

94.9 ± 8.4

2.5° to 5°

37 (16.6%)

95.2 ± 4.8

96.9 ± 3.6

5° to 7.5°

9 (4.0%)

90.1 ± 13.7

93.8 ± 6.5

7.5° to 10°

3 (1.3%)

88.0 ± 7.2

93.0 ± 2.6

Gulati (2009) [7]

HKA^b

 < 0°

13 (8.2%)

70 ± 13***(94 ± 8)^c

92 ± 13

45.0 ± 4.0*

0 to 4°

29 (18.4%)

77 ± 15*** (89 ± 14)^c

86 ± 15.1

42.0 ± 5.0*

5° to 10°

116 (73.4%)

94 ± 10*** (94 ± 10)^c

83 ± 21

40.0 ± 9.0*

Kennedy (2019) [22]

HKA^b

 < 0°

67 (7.5%)

92.6 ± 11

81.6 ± 24

42.0 ± 7 (92%*)^d

0° to 4°

308 (34.6%)

90.7 ± 14

84.1 ± 17

41.1 ± 8 (85%*)^d

5° to 10°

508 (57.0%)

92.1 ± 12

84.6 ± 18

41.3 ± 8 (76%*)^d

 > 10°

8 (0.9%)

-

-

Kim (2012) [24]

TFA^b

 < 0°

11 (4.5%)

73.4 ± 7.6*** (90.6 ± 7.4)^c

79.1 ± 10.4

1° to 3°

43 (17.8%)

80.9 ± 7.0*** (90.0 ± 6.6)^c

82.6 ± 10.0

4° to 6°

101 (41.1%)

87.7 ± 8.5*** (88.5 ± 8.4)^c

82.2 ± 12.5

7° to 9°

78 (31.7%)

88.3 ± 7.6*** (88.3 ± 7.6)^c

80.3 ± 12.3

 > 10°

13 (5.3%)

84.1 ± 14.1*** (85.8 ± 14.2)^c

81.2 ± 17.1