Table 2 Demographic characteristics of the two groups

Age (year)^b

54.22 ± 12.34

54.74 ± 12.40

0.697

Sex (Female)^a

65(68.4%)

436 (50.2%)

0.001

BMI(kg/m²) ^b

23.78 ± 3.49

23.37 ± 3.24

0.246

ASA score ≥ 3^a

25 (30.5%)

203 (23.4%)

0.130

Diagnosis(n,%)

0.482

OA^a

29 (30.5%)

195 (22.5%)

DDH^a

17(17.9%)

195 (22.5%)

ONFH^a

40(42.1%)

394 (45.4%)

AS^a

3(3.2%)

34 (3.9%)

RA^a

6(6.3%)

50 (5.8%)

Comorbidity(n,%)

Hypertension^a

22 (23.2%)

202 (23.3%)

1.000

Diabetes^a

7 (7.4%)

38 (4.4%)

0.197

Heart Disease^a

3 (3.2%)

57 (6.6%)

0.263

COPD^a

4 (4.2%)

13 (1.5%)

0.078

Laboratory test

Hb(g/L)^b

131.51 ± 15.63

133.45 ± 17.00

0.287

CRP (mg/L) ^b

4.22 ± 3.01

4.45 ± 4.02

0.600

ESR (mm/h) ^b

25.56 ± 20.18

28.20 ± 20.53

0.233

WBC count (× 10⁹) ^b

5.93 ± 1.71

5.96 ± 1.79

0.892

Serum albumin (g/L) ^b

43.48 ± 4.48

43.32 ± 3.79

0.701