Table 1 Demographic data of the patients between two groups

Sex (male/female)

6/41

7/39

0.733

Age (years)

68.13 ± 8.12

68.65 ± 9.54

0.776

Height (cm)

162.36 ± 6.82

159.87 ± 6.91

0.083

Weight (kg)

71.32 ± 9.20

68.65 ± 12.20

0.236

BMI (kg/m²)

27.06 ± 3.19

26.81 ± 4.16

0.749

Diagnosis (OA/RA)

44/2

44/3

0.651

Side (left)

41.30 %

40.43 %

0.931

ASA score (1/2/3)

5/21/21

7/27/12

0.171

Liver function abnormal (%)

19.57%

14.89%

0.551

Pre-OP allergy (%)

15.22 %

10.64%

0.510

 Pre-OP HGB

132.32 ± 10.25

130.82 ± 10.35

0.486

 Pre-OP HCT (%)

39.35 ± 3.32

38.77 ± 2.9296

0.375

 Pre-OP D-dimer

0.70 ± 1.07

1.19 ± 1.70

0.099

 Pre-OP Fig

2.91 ± 0.55

2.95 ± 0.69

0.788

 Pre-OP WBC

6.14 ± 1.76

5.64 ± 1.33

0.122

 Pre-OP RBC

4.31 ± 0.34

4.27 ± 0.33

0.616

 Pre-OP PLT

235.36 ± 61.04

238.07 ± 73.58

0.847