Table 2.
Multivariate competing risk regression model analysis.
| Characteristics | BCSD (N1 = 215,32.9%) | OCSD (N2 = 438,67.1%) | ||||
|---|---|---|---|---|---|---|
| Hazard ratio | 95% CI | p-value | Hazard ratio | 95% CI | p-value | |
| Age | ||||||
| <65 | 1 | – | – | 1 | – | – |
| ≧65 | 1.64 | 1.214–2.211 | 0.0013 | 5.411 | 4.157–7.044 | <0.0001 |
| Race | ||||||
| Non-Hispanic White | 1 | – | – | 1 | – | – |
| Non-Hispanic Black | 1.536 | 1.033–2.285 | 0.03 | 1.106 | 0.766–1.598 | 0.59 |
| others | 1.326 | 0.937–1.877 | 0.11 | 0.712 | 0.540–0.939 | 0.016 |
| Year of diagnosis | ||||||
| 1998–2006 | 1 | – | – | 1 | – | – |
| 2007–2015 | 0.69 | 1.214–2.211 | 0.012 | 0.836 | 0.680–1.028 | 0.089 |
| Marital status | ||||||
| Married | 1 | – | – | 1 | – | – |
| others | 1.25 | 0.940–1.675 | 0.12 | 1.61 | 1.310–1.977 | <0.0001 |
| Grade | ||||||
| I | 1 | – | – | 1 | – | – |
| II | 2.44 | 1.356–4.388 | 0.0029 | 0.99 | 0.787–1.244 | 0.93 |
| III+IV | 3.78 | 2.064–6.936 | <0.0001 | 0.989 | 0.730–1.341 | 0.94 |
| ER Status | ||||||
| Positive | 1 | – | – | 1 | – | – |
| Negative | 0.866 | 0.56–1.341 | 0.52 | 0.992 | 0.680–1.449 | 0.97 |
| PR Status | ||||||
| Positive | 1 | – | – | 1 | – | – |
| Negative | 1.81 | 1.234–2.640 | 0.0024 | 1.206 | 0.931–1.562 | 0.16 |
| T Stage | ||||||
| T0–1 | 1 | – | – | 1 | – | – |
| T2 | 2.31 | 1.646–3.240 | <0.0001 | 1.256 | 1.017–1.552 | 0.034 |
| T3 | 2.71 | 1.430–5.119 | 0.0022 | 1.445 | 0.618–3.377 | 0.4 |
| T4 | 2.57 | 1.232–5.368 | 0.01 | 2.987 | 1.734–5.145 | <0.0001 |
| N Stage | ||||||
| N0 | 1 | – | – | 1 | – | – |
| N1 | 1.85 | 1.303–2.612 | <0.0001 | 0.953 | 0.741–1.227 | 0.71 |
| N2 | 3.49 | 2.088–5.819 | <0.0001 | 1.025 | 0.566–1.858 | 0.93 |
| N3 | 6.45 | 3.721–11.187 | <0.0001 | 0.591 | 0.210–1.662 | 0.32 |
| Surgery | ||||||
| NS-BCT | 1 | – | – | 1 | – | – |
| NE-BCT | 0.945 | 0.715–1.249 | 0.69 | 1.217 | 1.002–1.478 | 0.048 |
| Radiation | ||||||
| Yes | 1 | – | – | 1 | – | – |
| No | 1.38 | 1.018–1.858 | 0.038 | 1.753 | 1.454–2.112 | <0.0001 |
| Chemotherapy | ||||||
| Yes | 1 | – | – | 1 | – | – |
| No | 1.04 | 0.731–1.481 | 0.83 | 2.311 | 1.681–3.178 | <0.0001 |
NE-BCT, nipple-excising breast-conserving therapy; NS-BCT, nipple-sparing breast-conserving therapy; ER, estrogen receptor; PR, progesterone receptor; HER-2, human epidermal growth factor receptor 2; BCSD, breast-cancer-specific death; OCSD, other-cause-specific death.