Table 1 Potential predictive factors in relation to SN status
Determinants | Category | Total | SN negative | SN positive | ||
|---|---|---|---|---|---|---|
N | % | N | % | |||
Screening | No | 1062 | 719 | 38.2 | 343 | 51.1 |
Yes | 1435 | 1123 | 59.7 | 312 | 46.5 | |
Unknown | 55 | 39 | 2.1 | 16 | 2.4 | |
Age | ≤ 50 | 499 | 337 | 17.9 | 162 | 24.1 |
51–74 | 1702 | 1290 | 68.6 | 412 | 61.4 | |
≥75 | 351 | 254 | 13.5 | 97 | 14.5 | |
Menopause status | Pre | 512 | 348 | 18.5 | 164 | 24.4 |
Post < 5 years | 228 | 168 | 8.9 | 60 | 8.9 | |
Post ≥ 5 years | 1721 | 1299 | 69.1 | 422 | 62.9 | |
Unknown | 91 | 66 | 3.5 | 25 | 3.7 | |
Tumor size | T1 | 1505 | 1138 | 60.5 | 367 | 54.7 |
T2 | 559 | 346 | 18.4 | 213 | 31.7 | |
T3 and T4 | 25 | 13 | 0.7 | 12 | 1.8 | |
Unknown | 463 | 384 | 20.4 | 79 | 11.8 | |
Tumor type | Ductal | 1866 | 1324 | 70.4 | 542 | 80.8 |
D and L | 52 | 35 | 1.9 | 17 | 2.5 | |
Lobular | 304 | 216 | 11.5 | 88 | 13.1 | |
Other | 330 | 306 | 16.3 | 24 | 3.6 | |
Histological grade | I | 622 | 488 | 25.9 | 134 | 20.0 |
II | 1112 | 807 | 42.9 | 305 | 45.5 | |
III | 790 | 563 | 29.9 | 227 | 33.8 | |
Unknown | 28 | 23 | 1.2 | 5 | 0.7 | |
Estrogen receptor | Positive | 2144 | 1538 | 81.8 | 606 | 90.3 |
Negative | 279 | 218 | 11.6 | 61 | 9.1 | |
Unknown | 129 | 125 | 6.6 | 4 | 0.6 | |
Progesterone receptor | Positive | 1851 | 1320 | 70.2 | 531 | 79.1 |
Negative | 571 | 436 | 70.2 | 531 | 79.1 | |
Unknown | 130 | 125 | 6.6 | 5 | 0.7 | |
HER-2 status | Negative | 1466 | 1041 | 55.3 | 423 | 63.0 |
Positive | 240 | 174 | 9.3 | 66 | 9.8 | |
Unknown | 848 | 666 | 35.4 | 182 | 27.1 | |
Multifocality | No | 1570 | 1184 | 62.9 | 386 | 57.5 |
Yes | 352 | 208 | 11.1 | 144 | 21.5 | |
Unknown | 630 | 489 | 26.0 | 141 | 21.0 | |
Vascular invasion | No | 1324 | 1056 | 56.1 | 268 | 39.9 |
Yes | 184 | 87 | 4.6 | 97 | 14.5 | |
Unknown | 1044 | 738 | 39.2 | 306 | 45.6 | |