Table 1 The demographic features of patients recruited

Sex

 Female, n (%)

34, 47.9%

205, 57.7%

0.126

 Males, n (%)

37, 52.1%

150, 42.3%

0.126

Age (year)**

65, (59,74)

63, (53,71)

0.095

Body mass index (kg/m²)**

24.22, (22.60, 27.18)

25.24 (22.89, 27.36)

0.339

Involved joint

 Hip, n (%)

43, 60.6%

207, 58.3%

0.725

 Knee, n (%)

28, 39.4%

148, 41.7%

0.725

ASA score

 1, n (%)

1, 1.4%

4, 1.1%

0.386

 2, n (%)

54, 76.1%

299, 84.2%

0.386

 3, n (%)

15, 21.1%

50, 14.1%

0.386

 4, n (%)

1, 1.4%

2, 0.6%

0.386

PJI type

 Early infection, n (%)^b

8, 11.3%

6, 1.7%

 < 0.0001*

 Chronic infection, n (%)^c

21, 29.6%

90, 25.3%

0.459

Heart disease, n (%)

8, 11.2%

27, 7.6%

0.305

Kidney disease, n (%)

0

0

1

Smoking, n (%)

12, 16.9%

43, 12.1%

0.468

Drinking, n (%)

12, 16.9%

42, 11.9%

0.385

RA, n (%)

5, 7%

31, 8.7%

0.815

Revision-cause

 PJI (septic revision), n (%)

29, 40.85%

96, 27.04%

0.02*

DAIR^a, n (%)

9, 31.03%

33, 34.37%

0.739

 1-stage revisions^a, n (%)

7, 24.13%

28, 29.17%

0.597

 2-stage revisions^a, n (%)

13, 44.83%

35, 36.46%

0.417

 Aseptic revision, n (%)

42, 59.15%

259, 72.96%

0.02*

Re-revision-cause, n (%)

17, 23.94%

27, 7.61%

 < 0.0001*

 PJI (septic re-revision), n (%)

8, 11.27%

9, 2.54%

0.003*

 Aseptic re-revision, n (%)

9, 12.68%

18, 5.07%

0.028*