Table 1 Patient demographic characteristics

Age, years*

73.3 (59.0‒84.0)

Sex, n^†

 Female, n

58 (77.3)

 Male, n

17 (22.7)

BMI, kg/m^2*

26.9 (20.2‒31.2)

ASA class

 1

3 (4.0)

 2

45 (60.0)

 3

26 (34.7)

 4

1 (1.3)

F/U period, months*

36.1 (30.0‒40.0)

Side, n^†

 Right, n

34 (45.3)

 Left, n

41 (54.7)

Time interval from primary TKA to revision TKA, years^*

6.7 (0.8‒17.0)

Modes of failure, n^†

 Septic

34 (45.3)

 Aseptic

41 (54.7)

  Loosening

21 (28.0)

  Instability

11 (14.7)

  PE wear

7 (9.3)

  Stiffness

2 (2.7)