Research Article
Survival Outcome and Impact of Chemotherapy in T1 Node-Negative Triple-Negative Breast Cancer: A SEER Database Analysis
Table 3
Univariate and multivariate analyses of overall survival.
| Variables | Univariate analysis | Multivariate analysis | HR | 95% CI | | HR | 95% CI | |
| Age (years) | | | | | | | >50 vs. ≤ 50 | 2.272 | 1.543–3.345 | <0.001 | 2.227 | 1.507–3.289 | <0.001 | Histologic subtype | | | | | | | Lobular vs. ductal | 0.905 | 0.337–2.429 | 0.843 | 0.864 | 0.317–2.356 | 0.775 | Tumor size | | | | | | | T1a | 1 | | | 1 | | | T1b | 1.415 | 0.846–2.369 | 0.186 | 1.680 | 0.998–2.829 | 0.051 | T1c | 2.105 | 1.321–3.355 | 0.002 | 2.742 | 1.702–4.418 | <0.001 | Grade | | | | | | | 3 vs. 1–2 | 1.213 | 0.946–1.555 | 0.128 | 1.153 | 0.891–1.491 | 0.278 | Chemotherapy | | | | | | | No/unknown vs. yes | 2.445 | 1.938–3.085 | <0.001 | 2.766 | 2.185–3.501 | <0.001 |
|
|
Abbreviations: HR, hazard ratio; CI, confidence interval.
|