Table 3. Multivariate analysis of locoregional recurrence-free survival (LRFS), progress-free survival (PFS), and overall survival (OS).
| Factor | LRFS hazard ratio | P-value | PFS hazard ratio | P-value | OS hazard ratio | P-value |
|---|---|---|---|---|---|---|
| Year(<44 y vs ≥44y) | 0.809 (0.455-1.411) | 0.473 | 1.584 (1.099-2.285) | 0.014 | 2.026(1.343-3.057) | 0.001 |
| Gender | 0.585 (0.280-1.221) | 0.153 | 0.709 (0.466-1.129) | 0.148 | 0.795 (0.481-1.315) | 0.372 |
| concurrent chemotherapy (yes vs no) | 1.033 (0.431-2.478) | 0.941 | 0.644 (0.364-1.140) | 0.131 | 0.661 (0.368-1.187) | 0.166 |
| T classification | 1.234 (0.910-1.673) | 0.175 | 1.492 (1.214-1.832) | 0.000 | 1.604 (1.274-2.018) | 0.000 |
| N classification | 1.578 (1.093-2.278) | 0.015 | 1.683 (1.282-2.210) | 0.000 | 1.515 (1.133-2.027) | 0.005 |
| IT (>4 d vs ≤4d) | 1.047 (0.512-2.142) | 0.900 | 1.488 (1.012-2.188) | 0.043 | 1.741 (1.135-2.668) | 0.011 |
Abbreviations: LRFS= locoregional recurrence-free survival, PFS=progress-free survival, OS= overall survival, CI= confidence interval, IT= interrupted time.