Table 1. Clinicopathological characteristics.
| Characteristic | Preoperative MRI (n = 743) No. (%) |
Without preoperative MRI (n = 211) No. (%) |
p-value |
|---|---|---|---|
| Age at diagnosis (yr)* | 48.9 ± 9.06 | 50.5 ± 10.21 | 0.098 |
| Age (yr) | 0.018 | ||
| ≤ 50 | 417 (56.1) | 99 (46.9) | |
| > 50 | 326 (43.9) | 112 (53.1) | |
| T stage | 0.244 | ||
| T1 | 596 (80.2) | 154 (73.0) | |
| T2 | 147 (19.8) | 57 (27.0) | |
| Nodal status | 0.547 | ||
| Node negative | 126 (17.0) | 48 (22.7) | |
| Node positive | 617 (83.0) | 163 (77.3) | |
| Histologic type | 0.190 | ||
| Ductal | 648 (87.2) | 191 (90.5) | |
| Other | 95 (12.8) | 20 (9.5) | |
| Histologic grade (n = 806) | 0.200 | ||
| I, II | 456 (71.9) | 132 (76.7) | |
| III | 178 (28.1) | 40 (23.3) | |
| ER | 0.318 | ||
| Negative | 243 (32.7) | 78 (37.0) | |
| Positive | 500 (67.3) | 133 (63.0) | |
| PR | 0.374 | ||
| Negative | 302 (40.6) | 93 (44.1) | |
| Positive | 441 (59.4) | 118 (55.9) | |
| Hormone therapy | 0.034 | ||
| No | 167 (22.5) | 62 (29.4) | |
| Yes | 576 (77.5) | 149 (70.6) | |
| Chemotherapy | 0.722 | ||
| No | 334 (45.0) | 92 (43.6) | |
| Yes | 409 (55.0) | 119 (56.4) |
MRI=magnetic resonance imaging; ER=estrogen receptor; PR=progesterone receptor.
*Mean±SD.