Table 5. Univariate analysis of relapse-free survival using Cox proportional hazards models in the HR+/HER2− breast cancer cohort.
| Variables | Relapse-free survival | |
|---|---|---|
| HR (95% CI) | P | |
| Age, years | ||
| ≤50 | Reference | – |
| >50 | 1.09 (0.66–1.80) | 0.732 |
| T category | ||
| T1 | Reference | – |
| T2 | 1.85 (1.09–3.14) | 0.022 |
| T3 | 19.34 (5.65–66.22) | <0.001 |
| N category | ||
| N0 | Reference | – |
| N1 | 2.24 (1.10–4.53) | 0.025 |
| N2 | 4.11 (1.90–8.87) | <0.001 |
| N3 | 10.95 (5.40–22.20) | <0.001 |
| Tumor grade | ||
| I–II | Reference | – |
| III | 1.40 (0.81–2.42) | 0.230 |
| Radiotherapy | ||
| No | Reference | – |
| Yes | 2.91(1.76–4.79) | <0.001 |
| Chemotherapy | ||
| No | Reference | – |
| Yes | 1.17 (0.62–2.19) | 0.630 |
HR, hazard ratio; CI, confidence interval.