Table 1 Baseline demographic and clinical data

Age

71.2 ± 8.4

72.3 ± 6.7

70.7 ± 6

n.s

Sex (Female/male)

15/10

16/9

16/9

n.s

BMI^§ (kg/m²)

29.3 ± 4.2

28.6 ± 3.8

28.1 ± 4.6

n.s

Side (right/left)

16/9

14/11

13/12

n.s

OKS* (preoperative)

16.5 ± 5.8

17 ± 4.5

18.4 ± 4.1

n.s

Womac (preoperative)

64 ± 14

66.6 ± 11.5

64.3 ± 9.3

n.s

Varus/valgus deformity

19/6

21/4

20/5

n.s

HKA^ angle in varus knee

170 ± 8.1

168.9 ± 7.4

169.2 ± 7.5

n.s

HKA^ angle in valgus knee

187.2 ± 7.7

186.8 ± 8.3

187.6 ± 6.4

n.s

Preop. ROM**

107.5° ± 11.4

108.3° ± 13.8

109° ± 9.8

n.s