Table 1.
Patient and surgical characteristics: mechanical failures
| Patient or surgical characteristic | All patients | Aseptic mechanical failure | Hazard ratio (95% CI) |
|---|---|---|---|
| Total patients | 114 | 6 | |
| Age at surgery (years) | p = 0.22 | ||
| < 40 | 29 | 2 | 1.00 (referent) |
| 40–54 | 28 | 1 | 0.45 (0.05–3.88) |
| 55–69 | 38 | 3 | 1.05 (0.19–5.8) |
| > 70 | 19 | 0 | 0 |
| p = 0.99 | |||
| < 55 | 57 | 3 | 1.00 (referent) |
| > 55 | 57 | 3 | 0.99 (0.22–4.34) |
| Sex | p = 0.94 | ||
| Male | 58 | 3 | 1.00 (referent) |
| Female | 56 | 3 | 1.07 (0.22–5.14) |
| BMI (kg/m2) | p = 0.25 | ||
| < 30 | 66 | 2 | 1.00 (referent) |
| > 30 | 48 | 4 | 2.68 (0.52–13.8) |
| Location of reconstruction | p = 0.048 | ||
| Proximal femur | 37 | 0 | 0 |
| Distal femur | 64 | 4 | 0.37 (0.08–1.77) |
| Proximal tibia | 13 | 2 | 1.00 (referent) |
| Indication for reconstruction | p = 0.22 | ||
| Primary oncologic | 40 | 1 | 1.00 (referent) |
| Revision arthroplasty | 69 | 5 | 2.86 (0.33–25.1) |
| Fracture non-/malunion | 5 | 0 | 0 |
| Radiation | p = 0.08 | ||
| No | 101 | 6 | 1.00 (referent) |
| Yes | 13 | 0 | 0 |
| Chemotherapy | p = 0.63 | ||
| No | 61 | 4 | 1.00 (referent) |
| Yes | 53 | 2 | 0.68 (0.14–3.43) |
CI = confidence interval; BMI = body mass index.