Table 1. Patient demographics for each group of arthroplasty patients pre-operatively.
| Patient demographics | TKA with no previous knee surgery | TKA with previous history of surgery | P value |
|---|---|---|---|
| Number of patients | 279 | 29 | – |
| Age | 66.10±7.80 | 61.00±7.51 | <0.001* |
| Gender (male:female) | 202 (72.4%):77 (27.6%) | 18 (62%):11 (38%) | – |
| BMI | 27.2±4.1 | 27.0±3.7 | 0.777 |
| Flexion range of movement (degree) | 119±16 | 121±20 | 0.605 |
| KSS-functional score | 53.7±18.4 | 61.0±13.8 | 0.039* |
| KSS-objective score | 37.5±19.4 | 40.4±16.7 | 0.431 |
| Oxford Knee Score | 34.6±8.0 | 34.5±7.8 | 0.998 |
| SF-36 (physical function) | 39.4±23.3 | 45.7±22.1 | 0.166 |
| SF-36 (role physical) | 22.1±36.4 | 26.7±40.6 | 0.519 |
| SF-36 (bodily pain) | 35.8±18.1 | 34.1±20.0 | 0.636 |
| SF-36 (general health) | 68.3±19.1 | 70.3±22.4 | 0.605 |
| SF-36 (vitality) | 67.7±19.6 | 60.9±28.0 | 0.210 |
| SF-36 (social functioning) | 53.3±33.8 | 51.7±39.5 | 0.839 |
| SF-36 (role emotional) | 80.0±38.7 | 69.0±47.1 | 0.230 |
| SF-36 (mental health) | 76.5±15.7 | 73.7±18.7 | 0.368 |
*, P<0.05. TKA, total knee arthroplasty; BMI, body mass index; KSS, Knee Society Score.