Table 2.
Histopathological features of breast cancer subtypes.
| Totals (N = 684) | ||
|---|---|---|
| No. | (%) | |
| Tumor histotype | ||
| Invasive ductal carcinoma (IDC) | 543 | (79.4) |
| Invasive lobular carcinoma (ILC) | 56 | (8.2) |
| Other | 60 | (8.8) |
| Missing | 25 | (3.6) |
| Grading | ||
| G1 | 69 | (10.1) |
| G2 | 264 | (38.6) |
| G3 | 266 | (38.9) |
| Not known | 42 | (6.1) |
| Missing | 43 | (6.3) |
| Hormone receptors | ||
| Negative | 148 | (21.6) |
| Positive | 503 | (73.6) |
| Not known | 3 | (0.4) |
| Missing | 30 | (4.4) |
| HER2 status | ||
| Negative | 431 | (63.0) |
| Positive | 211 | (30.9) |
| Not known | 2 | (0.3) |
| Missing | 40 | (5.8) |
| KI67, mean ± SD | 30 ± 21 | |
| KI67 | ||
| ≤20 | 264 | (38.6) |
| >20 | 295 | (43.1) |
| Missing | 125 | (18.3) |
N, number of total respondents.