Table 3.
Multivariate Cox Regression Analysis of Prognostic Factors Influencing Disease-Free Survival After Propensity Score Matching.
| Variables | Patients < 70 Years | Patients ≥ 70 Years | ||||
|---|---|---|---|---|---|---|
| HR | 95% CI | P | HR | 95% CI | P | |
| Gender | ||||||
| Female | 1 | 1 | ||||
| Male | 1.196 | 0.765 to 1.870 | .432 | 0.490 | 0.171 to 1.401 | .183 |
| Location | ||||||
| Upper third | 1 | 1 | ||||
| Middle third | 1.111 | 0.669 to 1.844 | .684 | 0.737 | 0.252 to 2.149 | .576 |
| Lower third | 0.882 | 0.529 to 1.471 | .629 | 0.308 | 0.085 to 1.117 | .073 |
| N stage | ||||||
| 0 | 1 | 1 | ||||
| 1 | 1.194 | 0.797 to 1.789 | .389 | 1.612 | 0.621 to 4.184 | .327 |
| 2 | 1.351 | 0.870 to 2.098 | .180 | 2.427 | 0.850 to 7.182 | .096 |
| 3 | 1.840 | 0.998 to 3.391 | .051 | 1.592 | 0.905 to 2.73 | .053 |
| Tumor size (cm) | 1.071 | 0.972 to 1.180 | .167 | 1.425 | 1.039 to 1.953 | .028 |
| Adjuvant therapy | ||||||
| No | 1 | 1 | ||||
| Yes | 0.570 | 0.370 to 0.385 | <.001 | 0.855 | 0.604 to 1.726 | .415 |
Abbreviations: CI, confidence interval; HR, hazard ratio; LN, lymph node.