Table 1.
Study population and histopathological features
| Characteristic | Value |
|---|---|
| Age (years) | 51.0 (28–83) |
| Size of invasive cancer (cm) | 2.0 (1–6.2) |
| Histological grade | |
| 1 | 17 (6.2) |
| 2 | 127 (46.2) |
| 3 | 131 (47.6) |
| Histological type | |
| Invasive ductal carcinoma | 228 (82.9) |
| Non-invasive ductal carcinoma | 47 (17.1) |
| Nodal status | |
| Negative | 190 (69.1) |
| Positive | 85 (30.9) |
| Oestrogen receptor | |
| Negative | 81 (29.5) |
| Positive | 194 (70.5) |
| Progesterone receptor | |
| Negative | 103 (37.5) |
| Positive | 172 (62.5) |
|
HER2 overexpression | |
| Negative | 218 (79.3) |
| Positive | 57 (20.7) |
| Ki-67 labelling index | 27 (1–95) |
| <14% | 61 (22.2) |
| ≥14% | 214 (77.8) |
| Subtype | |
| Luminal A | 58 (21.1) |
| Luminal B (HER2 negative) | 108 (39.3) |
| Luminal B (HER2 positive) | 30 (10.9) |
| HER2 positive (non-luminal) | 27 (9.8) |
| Triple negative (ductal) | 52 (18.9) |
HER2, human epidermal growth factor receptor 2.
Data are presented as the median (range) or n (%).