Table 2.
Multivariate analysis for disease-free survival and overall survival in the unadjusted cohort.
| Characteristics | Disease-free survival |
Overall survival |
||
|---|---|---|---|---|
| HR (95% CI) | P value | HR (95% CI) | P value | |
| IMNI | ||||
| No | 1 | 1 | ||
| Yes | 0.458 (0.235–0.891) | 0.021 | 0.233 (0.070–0.778) | 0.018 |
| Age | ||||
| <50 | 1 | 1 | ||
| ≧50 | 0.921 (0.533–1.592) | 0.768 | 1.020 (0.478–2.174) | 0.960 |
| Laterality | ||||
| Left | 1 | 1 | ||
| Right | 0.972 (0.594–1.592) | 0.911 | 0.977 (0.490–1.946) | 0.946 |
| Location | ||||
| Inner/central | 1 | 1 | ||
| Outer | 0.944 (0.568–1.567) | 0.823 | 0.880 (0.429–1.809) | 0.729 |
| Grade | ||||
| I-II | 1 | 1 | ||
| III | 1.056 (0.616–1.812) | 0.843 | 1.134 (0.526–2.447) | 0.748 |
| pT stage | ||||
| pT1-2 | 1 | 1 | ||
| pT3-4 | 1.727 (1.021–2.920) | 0.042 | 1.974 (0.960–4.056) | 0.064 |
| pN stage | ||||
| pN1-2 | 1 | 1 | ||
| pN3 | 2.666 (1.602–4.438) | <0.001 | 2.313 (1.134–4.716) | 0.021 |
| ER | ||||
| Negative | 1 | 1 | ||
| Positive | 0.381 (0.114–1.269) | 0.116 | 0.222 (0.047–1.060) | 0.059 |
| PR | ||||
| Negative | 1 | 1 | ||
| Positive | 1.789 (0.555–5.771) | 0.330 | 1.306 (0.275–6.191) | 0.737 |
| Her2 | ||||
| Negative | 1 | 1 | ||
| Positive | 0.676 (0.348–1.311) | 0.247 | 0.628 (0.263–1.502) | 0.296 |
HR, hazard ratio; CI, confidence interval; IMNI, internal mammary node irradiation; ER, estrogen receptor; PR, progesterone receptor.