Table 4.
Multivariable Cox regression analyses for factors associated with a second revision of cemented revision DFRs
| Implant factor | OR (95% CI) | p value |
| Collar | ||
| Porous (vs nonporous) | 2.3 (0.7-7.4) | 0.18 |
| Fabrication | ||
| Modular (vs custom) | 0.57 (0.23-1.4) | 0.22 |
| Resection length | ||
| < 150 mm | 0.54 (0.23-1.29) | 0.17 |
| Stem length | ||
| < 127 mm | 0.65 (0.17-2.5) | 0.53 |
| Stem diameter | ||
| < 15 vs ≥ 15 mm | 4.3 (1.1-16.6) | 0.03 |
| Cross pinning | ||
| Yes | 1.2 (0.52-2.8) | 0.68 |
| Patient and tumor factor | OR (95% CI) | p value |
| Gender | ||
| Men (vs Women) | 0.57 (0.26-1.2) | 0.16 |
| Age in years | ||
| < 18 | 1.5 (0.61-3.8) | 0.37 |
| Chemotherapy (yes vs no) | 0.99 (0.38-2.6) | 0.98 |
| Radiation (yes vs no) | 0.9 (0.34-2.4) | 0.83 |
| Diagnosisa | ||
| Osteosarcoma | 2.5 (0.74-8.5) | 0.14 |
| Ewing sarcoma | ||
| Chondrosarcoma | 2.9 (0.7-12) | 0.14 |
| Other | 0.53 (0.18-1.5) | 0.25 |
a
Benign tumors are the reference group.