Table 4.
Multivariate analysis of prognostic factors using the Cox-regression model (including 8th AJCC pathological prognostic stages)
| Variables | HR | 95%CI | P |
|---|---|---|---|
| Age (years) | |||
| <50 | 1 | ||
| ≥50 | 1.112 | 0.900-1.374 | 0.324 |
| Race/ethnicity | |||
| Non-Hispanic White | 1 | ||
| Non-Hispanic Black | 1.299 | 1.051-1.606 | 0.015 |
| Hispanic (All Races) | 0.848 | 0.644-1.117 | 0.241 |
| Other | 0.906 | 0.650-1.264 | 0.562 |
| Histological subtype | |||
| Infiltrating ductal carcinoma | 1 | ||
| Invasive lobular carcinoma | 1.155 | 0.815-1.637 | 0.417 |
| Other | 0.795 | 0.795-0.637 | 0.044 |
| T category | |||
| T1 | 1 | ||
| T2 | 1.074 | 0.732-1.576 | 0.716 |
| T3 | 1.262 | 0.848-1.881 | 0.254 |
| T4 | 1.663 | 1.162-2.381 | 0.005 |
| Tx | 1.246 | 0.746-2.082 | 0.401 |
| 8th AJCC pathological prognostic stages | |||
| IV | 1 | ||
| IIIA | 0.312 | 0.186-0.525 | <0.001 |
| IIIB | 0.415 | 0.300-0.573 | <0.001 |
| IIIC | 0.820 | 0.611-1.102 | 0.188 |
HR, hazard ratio; CI, confidence interval.