Table 2.
Characteristics of patients according to pN status in the propensity-score-matched cohort
| pN0(i−) |
pN1mi |
pN1macro |
Chi2 |
||||
|---|---|---|---|---|---|---|---|
| Nb | % | Nb | % | Nb | % | P value | |
| 409 | 32 | 449 | 35 | 436 | 34 | ||
| Age, years | |||||||
| ≤40 | 18 | 4.4 | 24 | 5.3 | 20 | 4.6 | 0.982 |
| 40.1-50 | 86 | 21.0 | 96 | 21.4 | 93 | 21.3 | |
| 50.1-74.9 | 260 | 63.6 | 284 | 63.3 | 282 | 64.7 | |
| ≥75 | 45 | 11.0 | 45 | 10.0 | 41 | 9.4 | |
| SLNB/ALND | |||||||
| SLNB | 69 | 16.9 | 77 | 17.1 | 73 | 16.7 | 0.987 |
| SLNB + ALND | 340 | 83.1 | 372 | 82.9 | 363 | 83.3 | |
| LVI | |||||||
| No | 327 | 80.0 | 353 | 78.6 | 348 | 79.8 | 0.866 |
| Yes | 82 | 20.0 | 96 | 21.4 | 88 | 20.2 | |
| Tumor size, mm | |||||||
| ≤5 | 12 | 2.9 | 14 | 3.1 | 17 | 3.9 | 0.357 |
| 5.1-10 | 69 | 16.9 | 69 | 15.4 | 67 | 15.4 | |
| 10.1-19.9 | 157 | 38.4 | 165 | 36.7 | 134 | 30.7 | |
| 20-50 | 146 | 35.7 | 177 | 39.4 | 188 | 43.1 | |
| >50 | 25 | 6.1 | 24 | 5.3 | 30 | 6.9 | |
| Surgery breast | |||||||
| BCS | 311 | 76.0 | 339 | 75.5 | 323 | 74.1 | 0.791 |
| Mastectomy | 98 | 24.0 | 110 | 24.5 | 113 | 25.9 | |
| Endocrine therapy | |||||||
| No | 17 | 4.2 | 22 | 4.9 | 15 | 3.4 | 0.555 |
| Yes | 392 | 95.8 | 427 | 95.1 | 421 | 96.6 | |
| Chemotherapy | |||||||
| No | 197 | 48.2 | 219 | 48.8 | 197 | 45.2 | 0.523 |
| Yes | 212 | 51.8 | 230 | 51.2 | 239 | 54.8 | |
| Grade | |||||||
| 1 | 133 | 32.5 | 148 | 33.0 | 141 | 32.3 | 0.975 |
| 2 | 216 | 52.8 | 232 | 51.7 | 234 | 53.7 | |
| 3 | 60 | 14.7 | 69 | 15.4 | 61 | 14.0 | |
ALND, axillary lymph node dissection; BCS, breast conservative surgery; LVI, Lympho-vascular invasion; Nb, number; SLNB, sentinel lymph node biopsy.