Table 2 Multiple comparisons of flexion group, the mean difference of HKA deviation range and the mean difference of FTA deviation range

Slight–moderate

− 3.17*

0.49

< 0.001

− 4.16 \(\sim\) − 2.17

− 3.51*

0.80

< 0.001

− 5.14 \(\sim\)− 1.89

Moderate–severe

− 8.04*

0.73

< 0.001

− 9.51 \(\sim\) − 6.57

− 11.98*

1.18

< 0.001

− 14.38\(\sim\)− 9.59

Slight–severe

− 11.20*

0.70

< 0.001

− 12.63 \(\sim\) − 9.78

− 15.50*

1.14

< 0.001

− 17.82 \(\sim\)− 13.18