Table 2

Clinical and demographic characteristics of patients with revision total hip arthroplasty (THA) or revision total knee arthroplasty (TKA)
Characteristic Revision THA Revision TKA
2 years 5 years 2 years 5 years
(n = 1,218) (n = 727) (n = 725) (n = 393)
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%

ASA, American Society of Anesthesiologists.

All numbers were rounded to the nearest digit, therefore totals may not exactly add up to 100%.

Singh and Lewallen

Singh and Lewallen BMC Medicine 2013 11:144   doi:10.1186/1741-7015-11-144

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