Table 1 Comparison of pre-operative demographics and clinical status among the groups

Gender (M/F)

2/49

1/49

2/50

0.828^a

Age^c (year)

68.6 (55–81)

70.8 (56–86)

69.3 (56–78)

0.178^b

Body mass index^c (kg/m²)

26.6 (20.8–33.7)

25.6 (20.7–31.2)

25.8 (20.2–33.3)

0.169^b

Involved knee (Rt./Lt.)

27/24

21/29

25/27

0.545^a

 Flexion contracture

9.4 (0–25)

8.8 (0–30)

8.8 (0–20)

0.859^b

 Further flexion

124.7 (100–150)

125.9 (90–150)

125.5 (40–150)

0.937^b

 Total range of motion

115.3 (80–145)

117.1 (60–145)

116.7 (35–145)

0.889^b

Tibiofemoral angle (degree)

Varus 4.5 (varus 24 - valgus 7)

Varus 2.8 (varus 19 - valgus 6)

Varus 2.9 (varus 18 - valgus 7)

0.225^b

 Knee

48.6 (19–90)

45.1 (6–74)

46.6 (24–71)

0.259^b

 Function

42.7 (0–86)

39.7 (0–71)

39.4 (2–71)

0.163^b

HSS score (points)

62.2 (38–84)

60.9 (27–82)

61.9 (43–78)

0.802^b

WOMAC score (points)

52.8 (19–96)

58.3 (17–96)

55.8 (17–91)

0.094^b