Table 1 Preoperative demographics

Age (y)^*

67.40 ± 3.34

66.90 ± 4.62

66.38 ± 3.38

Gender^‡ (M/F)

32/18

33/17

30/20

Weight (kg)^*

65.52 ± 4.99

65.22 ± 4.81

66.38 ± 3.84

Hight (cm)^*

159.38 ± 6.76

158.06 ± 5.81

157.92 ± 6.86

BMI (kg/m²)^*

25.85 ± 2.08

26.14 ± 1.98

26.70 ± 2.08

ASA^*

1.98 ± 0.65

1.94 ± 0.65

2.02 ± 0.62

Preop.Hb (g/L)^*

13.42 ± 0.55

13.45 ± 0.53

13.39 ± 0.56

Preop.Hct (L/L)^*

39.84 ± 1.26

39.87 ± 1.17

39.74 ± 1.25

Preop.CRP (mg/L)^*

3.23 ± 0.96

3.29 ± 0.76

3.25 ± 0.93

Preop.IL-6 (pg/mL)^*

4.05 ± 1.10

4.15 ± 1.15

4.11 ± 0.47

Preop. ROM^*

94.54 ± 3.40

93.90 ± 3.42

93.89 ± 4.15

Preop. VAS^*

5.16 ± 0.68

5.32 ± 0.82

5.22 ± 0.68

Duration of surgery (min)^*

66.84 ± 3.30

67.92 ± 3.30

68.02 ± 2.83