Table 1. Preoperative Data.
| Variable | Aseptic group | Septic group | p-value | |
|---|---|---|---|---|
| Number of patients | 68 | 26 | - | |
| Cause of revision | - | |||
| Loosening | 57 | |||
| Instability | 9 | |||
| Stiffness | 2 | |||
| Age (yr) | 72.1 ± 6.6 (54.3–85.8) | 68.6 ± 8.8 (45.8–84.8) | 0.071 | |
| Sex (male : female) | 4 : 64 | 4 : 22 | 0.211 | |
| BMI (kg/m2) | 27.5 ± 4.5 (21.5–36.7) | 25.9 ± 2.8 (20.5–35) | 0.104 | |
| Direction (right : left) | 44 : 24 | 15 : 11 | 0.635 | |
| Follow-up period (mo) | 44.4 ± 25.1 (24–112) | 54.8 ± 33.6 (24–153) | 0.159 | |
| Time to revision (mo) | 128.4 ± 72.1 (25–306) | 44.3 ± 45.3 (10–216) | < 0.001 | |
| Preoperative ROM (°) | 111.6 ± 16.8 (65–145) | 105.8 ± 13.7 (75–130) | 0.118 | |
| Preoperative WOMAC | 49.6 ± 20.3 (16–87) | 50.6 ± 21.0 (16–87) | 0.825 | |
| Preoperative KSKS | 50.5 ± 9.6 (15–70) | 46.5 ± 18.8 (17–88) | 0.310 | |
| Preoperative KSFS | 41.2 ± 15.5 (10–70) | 39.6 ± 18.6 (10–90) | 0.675 | |
Values are presented as mean ± standard deviation (range).
BMI: body mass index, ROM: range of motion, WOMAC: Western Ontario and McMaster University Osteoarthritis, KSKS: Knee Society Knee Score, KSFS: Knee Society Function Score.