Table 1 Patient demographics for revision and re-revision total knee replacements at a major revision centre

Gender (no. [%])

Female: 342 (49.7%)

Male: 346 (50.3%)

Age at revision surgery^a years (mean [sd])

69.5 (11.8)

Body mass index^a (mean [sd])

30.8 (6.1)

Charlson Comorbidity Index^a,b (no. [%])

  0

388 (56.4)

  1 to 15

272 (39.5)

  16 to 30

25 (3.6)

  31 to 50

3 (0.4)

Indication for Revision^a (no. [%])

  Infection

345 (50.2)

  Malalignment

10 (1.5)

  Aseptic loosening/lysis

116 (16.9)

  Component wear

14 (2.0)

  Dislocation/instability

79 (11.5)

  Periprosthetic fracture

19 (2.8)

  Progressive arthritis

57 (8.3)

  Stiffness

17 (2.5)

  Unexplained pain

28 (4.1)

  Other

3 (0.4)