Table 1 Baseline of characteristics and perioperative demographics

Age

65.3 ± 4.86

65.4 ± 5.22

0.076

0.9391^a

Gender (Famle/Male)

22/8

23/7

0.089

0.7656^b

BMI (kg/m²)

24.93 ± 5.24

24.83 ± 4.67

0.078

0.9381^a

Diagnoses n (%)

0.162

0.6876^b

Osteoarthritis

27 (90%)

26 (86.6%)

Rheumatoid arthritis

3 (10%)

4 (13.3%)

Side (L/R)

16/14

15/15

0.067

0.7961^b

 Hypertension

11 (36.7%)

13 (43.3%)

0.278

0.5982^b

 Diabetes

5 (16.6%)

4 (13.3%)

–

1.000^c

 COPD

2 (6.6%)

2 (6.6%)

–

1.000^c

 Hypothyroidism

0 (0%)

1 (3.3%)

–

1.000^c

 Rest

2.6 ± 0.8

2.6 ± 1.0

0.000

1.0000^a

 Activity

4.6 ± 1.5

4.5 ± 1.2

0.285

0.7766^a

 Preoperative ROM

104.3 ± 10.8

103.3 ± 10.7

0.360

0.7200^a

 Preoperative HSS

45.3 ± 6.2

48.8 ± 9.4

1.702

0.0940^a

 ASA (I/II/III)

0/25/5

0/24/6

–

1.0000^c