Table 1.
Patient clinical and pathological characteristics.
| Characteristics | All patients | NE-BCT | NS-BCT | χ2/F | p-value |
|---|---|---|---|---|---|
| N=3,460 | N=1,730 | N=1,730 | |||
| Age at diagnosis(median) | 62.21 ± 13.64 | 62.41 ± 13.60 | 62.02 ± 13.64 | 0.708 | >0.05 |
| Age | 0.11 | 0.92 | |||
| <65 | 1,935 (55.9) | 969 (56.0) | 966 (55.8) | ||
| ≧65 | 1,525 (44.1) | 761 (44.0) | 764 (44.2) | ||
| Race | 0.112 | 0.946 | |||
| Non-Hispanic White | 2,310 (66.8) | 1,159 (67.0) | 1,151 (66.5) | ||
| Non-Hispanic Black | 343 (9.9) | 169 (9.8) | 174 (10.1) | ||
| Others | 807 (23.3) | 402 (23.2) | 405 (23.4) | ||
| Year of diagnosis | 0.131 | 0.717 | |||
| 1998–2006 | 805 (23.3) | 398 (23.0) | 407 (23.5) | ||
| 2007–2015 | 2,655 (76.7) | 1,332 (77.0) | 1,323 (76.5) | ||
| Marital status | 0.07 | 0.79 | |||
| Married | 1,790 (51.7) | 899 (52.0) | 891 (51.5) | ||
| Others | 1,670 (48.3) | 831 (48.0) | 839 (48.5) | ||
| Laterality | 0.14 | 0.71 | |||
| Left | 1,819 (52.6) | 915 (52.9) | 904 (52.3) | ||
| Right | 1,641 (47.4) | 815 (47.1) | 826 (47.8) | ||
| Grade | 0.057 | 0.972 | |||
| I | 762 (22.0) | 379 (21.9) | 383 (22.1) | ||
| II | 1,640 (47.4) | 819 (47.3) | 821 (47.5) | ||
| III+IV | 1,058 (30.6) | 532 (30.7) | 526 (30.4) | ||
| ER Status | 0.002 | 0.96 | |||
| Positive | 2,875 (83.1) | 1,437 (83.1) | 1,438 (83.1) | ||
| Negative | 585 (16.9) | 293 (16.9) | 292 (16.9) | ||
| PR Status | 0.01 | 0.91 | |||
| Positive | 2,537 (73.3) | 1,267 (73.2) | 1,270 (73.4) | ||
| Negative | 923 (26.7) | 463 (26.8) | 460 (26.6) | ||
| T Stage | 0.76 | 0.69 | |||
| T0–1 | 2,219 (64.1) | 1,111 (64.2) | 1,108 (64.1) | ||
| T2 | 1,073 (31.0) | 530 (30.6) | 543 (31.4) | ||
| T3–4 | 168 (4.9) | 89 (5.1) | 79 (4.6) | ||
| N Stage | 0.41 | 0.81 | |||
| N0 | 2,441 (70.6) | 1,229 (71.0) | 1,212 (70.1) | ||
| N1 | 827 (23.9) | 406 (23.5) | 421 (24.3) | ||
| N2–3 | 192 (5.6) | 95 (5.5) | 97 (5.6) | ||
| Radiation | 0.11 | 0.74 | |||
| Yes | 2,335 (67.5) | 1,172 (67.8) | 1,163 (67.2) | ||
| No | 1,125 (32.5) | 558 (32.3) | 567 (32.8) | ||
| Chemotherapy | 0.08 | 0.78 | |||
| Yes | 1,190 (34.4) | 591(34.2) | 599 (34.6) | ||
| No | 2,270 (65.6) | 1,139 (65.8) | 1,131 (65.4) |
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.