Table 2 Preoperative range of motion (ROM), Knee society 1989 (knee and function score), and hip-knee-ankle (HKA) angle

Preoperative

 Extension angle (°)

-6.3 (SD 3.9; -12 ~ -5)

-5.4 (SD 5.6; -20 ~ -5)

n.s

 Flexion angle (°)

113.9 (SD 6.3; 95 ~ 120)

116.9 (SD 7.4; 100 ~ 130)

n.s

1989 Knee society

 Knee score

16.8 (SD 13.2; 2 ~ 40)

15.8 (SD 10.7; 0 ~ 40)

n.s

 Function score

56.5 (SD 15.6; 5 ~ 90)

47.5 (SD 25.2; 5 ~ 90)

n.s

 HKA angle (°)

187.3 (SD 4.1; 180 ~ 200)

187.3(SD 4.6; 180 ~ 201)

n.s