Table 1 Pre-operative characteristics

Cases (male/female)

22(10/12)

24(12/12)

9(3/6)

10(4/6)

Knees (male/female)

34(16/18)

29(14/15)

15(6/9)

12(5/7)

Age (years)

56 (40–74)

59 (43–75)

57 (45–68)

61 (51–71)

BMI (kg/m²)

26.0 (21.1–28.5)

25.4 (23.5–27.6)

27.1 (22.2–28.2)

26.1 (24.2–27.3)

K-L grade(II,III,IV)

3, 19, 12

12, 10, 7 ^a

0, 6, 9

1, 4, 7

Follow-up months

35 (27–42)

33 (27-65)

34 (29–41)

34 (28–39)