Table 3.
Multivariate analysis of prognostic factors in breast cancer specific survival.
| Variables | HR | 95% CI | P |
|---|---|---|---|
| Age (years) | |||
| ≤50 | 1 | ||
| >50 | 1.151 | 0.810–1.635 | 0.434 |
| Race/ethnicity | |||
| Non-hispanic white | 1 | ||
| Non-hispanic black | 0.763 | 0.511–1.141 | 0.188 |
| Hispanic | 0.690 | 0.428–1.112 | 0.128 |
| Other | 0.761 | 0.415–1.397 | 0.379 |
| Grade | |||
| Well/moderately differentiated | 1 | ||
| Poorly differentiated/Undifferentiated | 1.381 | 0.670–2.848 | 0.382 |
| Unknown | 1.508 | 0.662–3.435 | 0.329 |
| Tumor stage | |||
| T1 | 1 | ||
| T2 | 1.113 | 0.391–1.171 | 0.841 |
| T3 | 2.943 | 1.047–8.269 | 0.041 |
| T4 | 3.447 | 1.219–9.744 | 0.020 |
| Nodal stage | |||
| N0 | 1 | ||
| N1 | 1.365 | 0.911–2.046 | 0.131 |
| N2 | 1.822 | 1.112–2.986 | 0.017 |
| N3 | 2.157 | 1.160–4.009 | 0.015 |
| ER status | |||
| Negative | 1 | ||
| Positive | 0.715 | 0.433–1.180 | 0.190 |
| PR status | |||
| Negative | 1 | ||
| Positive | 1.266 | 0.704–2.277 | 0.431 |
| PMRT | |||
| No | 1 | ||
| Yes | 0.500 | 0.366–0.683 | <0.001 |
CI, confidence interval; ER, estrogen receptor; HR, hazard ratio, PMRT, post-mastectomy radiotherapy; PR, progesterone receptor.