Table 1.
Clinical pathological parameters of patients with breast cancer
| Feature | N (539) | % |
|---|---|---|
| Age (years) | ||
| >60 | 227 | 42.1 |
| ≤60 | 312 | 57.9 |
| T classification | ||
| T1 (<2 cm) | 147 | 27.3 |
| T2 (2‐5 cm) | 323 | 59.9 |
| T3 (≥5 cm) | 55 | 10.2 |
| T4 (chest wall and/or skin invasion) | 14 | 2.6 |
| N classification (pN) | ||
| N0 (no metastasis) | 259 | 48.1 |
| N1 (1‐3 metastasis) | 178 | 33 |
| N2 (4‐9 metastasis) | 64 | 11.9 |
| N3 (≥10 metastasis) | 38 | 7 |
| M classification | ||
| M0 (no distant metastasis) | 528 | 98 |
| M1 (distant metastasis) | 11 | 2 |
| TNM stage | ||
| I | 96 | 17.8 |
| II | 318 | 59 |
| III | 114 | 21.2 |
| IV | 11 | 2 |
| ER | ||
| Negative | 127 | 23.6 |
| Positive | 412 | 76.4 |
| PR | ||
| Negative | 175 | 32.5 |
| Positive | 364 | 67.5 |
| HER2 | ||
| Negative | 440 | 81.6 |
| Positive | 99 | 18.4 |
| Molecular subtypes | ||
| HER2 amplification | 92 | 17.1 |
| Luminal A/B | 419 | 77.7 |
| TNBC | 28 | 5.2 |
T, tumour size; N, lymph node; M, distant metastasis; TNM stage, according to AJCC 8th classification; TNBC, triple‐negative breast cancer.