Table 1 Summary of the preoperative characteristics of participants (n = 82)
Variable | Mean ± SD or n (%) |
|---|---|
Demographic characteristic | Â |
 Age (y) | 74.5 ± 6.4 |
 Sex |  |
  Men | 13 (15.9) |
  Women | 69 (84.1) |
 Height (cm) | 153.9 ± 7.7 |
 Weight (kg) | 60.1 ± 11.7 |
 BMI (kg/m2) | 25.2 ± 3.7 |
 Diabetes mellitus |  |
  Yes | 22 (26.8) |
  No | 60 (73.2) |
 Severity of knee OA |  |
  Kellgren‒Lawrence grade on operated side   (3/4) | 15/ 67 (18.3/ 81.7) |
  Kellgren‒Lawrence grade on contralateral side   (2/3/4/operated/unknown) | 11/ 11/ 31/ 27/ 2 (13.4/ 13.4/ 37.8/ 32.9/ 2.4) |
Knee function | Â |
 Knee-flexion ROM (°) |  |
  Operated side | 130.0 ± 12.8 |
  Contralateral side | 131.6 ± 12.6 |
 Knee-extension ROM (°) |  |
  Operated side | -5.9 ± 5.1 |
  Contralateral side | -3.5 ± 5.1 |
 Knee-extension muscle strength (Nm/kg) |  |
  Operated side | 1.02 ± 0.34 |
  Contralateral side | 1.14 ± 0.37 |
Knee pain, VAS (mm) | Â |
 Operated side | 51.3 ± 24.0 |
 Contralateral side | 27.1 ± 24.0 |
Performance-based physical function measure | Â |
 TUG test time (s) | 11.9 ± 4.9 |