Characteristic | ER-Positive | ER-Negative | ||||
---|---|---|---|---|---|---|
Age<35 | 35≤Age<50 | P-value | Age<35 | 35≤Age<50 | P-value | |
(N = 147) | (N = 901) | (N = 134) | (N = 663) | |||
Postoperative T stage | ||||||
 ypT0, ypTis | 6 (4.1) | 27 (3.0) | 0.638 | 28 (20.9) | 111 (16.8) | 0.310 |
 ypT1-ypT4 | 141 (95.9) | 874 (97.0) |  | 106 (79.1) | 552 (83.2) |  |
 ypT1 | 47 (32.2) | 351 (39.1) |  | 29 (21.6) | 188 (28.4) |  |
 ypT2 | 69 (47.3) | 348 (38.8) |  | 45 (33.6) | 204 (30.8) |  |
 ypT3 | 22 (15.1) | 158 (17.6) |  | 23 (17.2) | 94 (14.2) |  |
 ypT4 | 2 (1.4) | 14 (1.3) |  | 0 (0) | 0 (0) |  |
Postoperative N stage | ||||||
 ypN0 | 55 (37.4) | 296 (32.9) | 0.515 | 77 (57.5) | 301 (45.4) | 0.016 |
 pN1-ypN3 | 92 (62.6) | 604 (67.0) |  | 52 (38.8) | 323 (47.9) |  |
Pathologic response | ||||||
 Complete: breast and axilla | 7 (4.8) | 37 (4.1) | 0.713 | 26 (19.4) | 74 (11.2) | 0.009 |
 Complete: breast-only | 1 (0.7) | 3 (0.3) | 1.000 | 3 (2.2) | 45 (6.7) | 0.006 |