Table 1.
Patients’ characteristics and tumor features.
| Variables | Axillary lymph node metastases | |||
|---|---|---|---|---|
| Negative (n=742) | Positive (n=583) | p* | Total (N=1,325) | |
| Age (mean ±SD) | 51.12 (11.06) | 51.43 (11.38) | 0.6154 | 51.25 (11.20) |
| Clinical factors | ||||
| Tumor size, mm (mean ± SD) | 20.8 (1.164) | 29.1 (1.659) | <0.0001* | 24.44 (1.461) |
| Tumor size (mean ± SD) | ||||
| <20 mm | 458 (61.73) | 211 (36.19) | 669 (50.49) | |
| 20–40 mm | 246 (33.15) | 286 (49.06) | 532 (40.15) | |
| >40 mm | 38 (5.12) | 86 (14.75) | <0.0001* | 124 (9.36) |
| Grade | ||||
| I | 143 (19.27) | 72 (12.35) | 215 (16.23) | |
| II | 415 (55.93) | 320 (54.89) | 735 (55.47) | |
| III | 184 (24.80) | 191 (32.76) | 0.0002* | 375 (28.30) |
| Pathological factors | ||||
| Estrogen receptor | ||||
| Negative | 256 (34.50) | 177 (30.36) | 433 (32.68) | |
| Positive | 486 (65.50) | 406 (69.64) | 0.1106 | 892 (67.32) |
| Progesterone receptor | ||||
| Negative | 291 (39.22) | 183 (31.39) | 474 (35.77) | |
| Positive | 451 (60.78) | 400 (68.61) | 0.0032* | 851 (64.23) |
| HER2 | ||||
| Negative | 616 (83.02) | 444 (76.16) | 1060 (80.00) | |
| Positive | 126 (16.98) | 139 (23.84) | 0.0019* | 265 (20.00) |
| Lymphovascular invasion | ||||
| No | 585 (78.84) | 167 (28.64) | 752 (56.75) | |
| Yes | 157 (21.16) | 416 (71.36) | <0.0001* | 573 (43.25) |
*
p<0.01.