Table 4 Functional outcomes comparison of the Hepple stage 2 and stage 3 patients of the lesion group

Operative time, min

50.16 ± 5.89

48.64 ± 7.29

0.378^b

Hospital duration, day

3.63 ± 0.61

3.46 ± 0.58

0.300^b

VAS

1 yr

0.0 (0.0–.0)

0.0 (0.0–2.0)

0.173^c

2 yr

0.0 (0.0–1.0)

0.0 (0.0–1.0)

0.225^c

AOFAS

1 yr

89.88 ± 4.20

91.75 ± 4.96

0.421^b

2 yr

91.31 ± 4.69

92.07 ± 4.23

0.390^b

KAFS

1 yr

89.72 ± 4.39

90.61 ± 4.05

0.119^b

2 yr

91.56 ± 4.12

90.61 ± 4.43

0.515^b

ATT

1 yr

2.34 ± 1.18

2.64 ± 0.99

0.296^b

2 yr

2.81 ± 1.23

279 ± 1.07

0.929^b

AJPS

1 yr

Inversion 10°

7.41 ± 1.27

8.04 ± 1.40

0.073^b

1 yr

Inversion 20°

17.59 ± 1.76

17.82 ± 1.39

0.584^b

1 yr

Plantar flexion 10°

7.78 ± 1.13

7.43 ± 1.17

0.240^b

1 yr

Plantar flexion 20°

18.34 ± 1.18

18.36 ± 1.42

0.968^b

2 yr

Inversion 10°

7.97 ± 1.68

8.04 ± 1.32

0.865^b

2 yr

Inversion 20°

17.94 ± 1.65

17.96 ± 1.67

0.950^b

2 yr

Plantar flexion 10°

8.03 ± 1.20

7.61 ± 1.26

0.188^b

2 yr

Plantar flexion 20°

18.97 ± 1.12

17.96 ± 1.53

0.006^b