Characteristics of the Swedish breast cancer samples at diagnosis
| Characteristic | Breast cancer patients, n | |
|---|---|---|
| Age at diagnosis (y), median (range) | 54.3 (27.1-75.9) | |
| Distant metastasis | ||
| Negative | 770 | |
| Positive | 12 | |
| Regional lymph node metastasis | ||
| Negative | 574 | |
| Positive | 237 | |
| Stage at diagnosis | ||
| 0 | 10 | |
| I | 421 | |
| II | 320 | |
| III | 21 | |
| IV | 13 | |
| Histologic grade | ||
| Grade 1 | 142 | |
| Grade 2 | 322 | |
| Grade 3 | 250 | |
| Estrogen receptors | ||
| Negative | 146 | |
| Positive | 358 | |
| Progesterone receptor | ||
| Negative | 165 | |
| Positive | 275 | |
| Tumor size (mm) | ||
| In situ | 9 | |
| <20 | 510 | |
| 21-50 | 223 | |
| >50 | 19 | |