Table 2 Clinical and demographic characteristics of patients with revision total hip arthroplasty (THA) or revision total knee arthroplasty (TKA)

Mean age ± SD

65.8 ± 12.9

64.6 ± 13.3

68.7 ± 9.9

67.8 ± 10.2

Men/women (%)

46%/54%

45%/55%

51%/49%

53%/47%

Age groups, n (%):

 ≤60 years

31%

33%

20%

22%

 >60 to 70 years

26%

27%

32%

29%

 >70 to 80 years

34%

34%

40%

41%

 >80 years

9%

6%

8%

7%

Body mass index, kg/m²:

 ≤25 (normal)

29%

28%

12%

11%

 >25 to 29.9 (overweight)

39%

41%

38%

38%

 30 to 34.9 (mildly obese)

21%

21%

28%

29%

 35 to 39.9 (obese)

6%

6%

15%

14%

 ≥40 (morbidly obese)

3%

3%

7%

7%

ASA score:

 Class I to II

56%

63%

55%

59%

 Class III to IV

44%

37%

45%

41%

 Underlying diagnosis:

 Loosening/wear or osteolysis

73%

75%

62%

64%

 Dislocation, bone or prosthesis Fracture, instability, non-union

17%

15%

25%

24%

 Failed prior arthroplasty with components removed or infection

11%

11%

13%

11%