Table 2.
Univariate and multivariate Cox regression analyses of overall survival and disease-free survival in breast cancer patients
| Covariate |
Univariate analysis |
Multivariate analysis |
||||
|---|---|---|---|---|---|---|
| HR | 95% CI | p value | HR | 95% CI | p value | |
| Overall survival | ||||||
| Age (≤60 versus >60) | 1.826 | 1.122–2.971 | 0.015∗ | 2.097 | 1.209–3.637 | 0.008∗∗ |
| Tumor stage (I + II versus III + IV) | 2.777 | 1.697–4.545 | 0.000∗∗ | 3.587 | 1.713–7.512 | 0.001∗∗ |
| Tumor size (≤2 cm versus >2 cm) | 2.327 | 1.217–4.448 | 0.011∗ | 1.478 | 0.733–2.980 | 0.275 |
| Lymph node metastasis (N0 versus N1–3) | 2.132 | 1.284–3.537 | 0.003∗∗ | 1.280 | 0.615–2.661 | 0.509 |
| Race (Other/White) | 0.639 | 0.361–1.130 | 0.124 | 0.577 | 0.319–1.045 | 0.070 |
| Radiation (No/Yes) | 0.572 | 0.343–0.953 | 0.032∗ | 0.366 | 0.203–0.660 | 0.001∗∗ |
| PCAT-1 gene alteration (low versus amplification) | 2.364 | 1.458–3.833 | 0.000∗∗ | 1.948 | 1.135–3.341 | 0.015∗ |
| Disease-free survival | ||||||
| Age (≤60 versus >60) | 0.817 | 0.478–1.396 | 0.459 | 0.912 | 0.516–1.615 | 0.753 |
| Tumor stage (I + II versus III + IV) | 3.109 | 1.870–5.166 | 0.000∗∗ | 3.576 | 1.731–7.386 | 0.001∗∗ |
| Tumor size (≤2 cm versus >2 cm) | 2.089 | 1.086–4.017 | 0.027∗ | 1.331 | 0.669–2.644 | 0.415 |
| Lymph node metastasis (N0 versus N1–3) | 1.707 | 1.021–2.854 | 0.042∗ | 0.965 | 0.464–2.006 | 0.924 |
| Race (Other/White) | 0.525 | 0.297–0.927 | 0.026∗ | 0.553 | 0.311–0.981 | 0.043∗ |
| Radiation (No/Yes) | 0.923 | 0.553–1.538 | 0.757 | 0.599 | 0.338–1.061 | 0.079 |
| PCAT-1 gene alteration (low versus amplification) | 2.049 | 1.238–3.392 | 0.005∗∗ | 1.829 | 1.078–3.103 | 0.025∗ |
HR, hazard ratio; 95% CI, 95% confidence interval. ∗p < 0.05 and ∗∗p < 0.01.