Table 2.
Results of multivariate Cox regression analysis of overall survival and local-regional control
| Factor | Overall survival | Local-regional control | ||||
|---|---|---|---|---|---|---|
| p value | HR | 95% CI | p value | HR | 95% CI | |
| Age: 70-74 (vs. > 74) | 0.011 | 1.617 | 1.128-2.476 | 0.041 | 1.756 | 1.024-3.013 |
| Tumor length: ≤ 5 cm (vs. > 5 cm) | 0.124 | 1.357 | 0.920-2.000 | 0.570 | 1.165 | 0.687-1.976 |
| cN stage: N0 (vs. N1) | 0.005 | 1.762 | 1.185-2.619 | 0.005 | 2.197 | 1.276-3.782 |
| Total dose: ≤ 66 Gy (vs. > 66 Gy) | 0.076 | 1.569 | 0.955-2.580 | 0.011 | 2.244 | 1.207-4.171 |
CI – confidence interval, HR – hazard ratio, c – clinical