Table 1.
Tumour and patient characteristics of the included patients diagnosed with ER+/HER2– tumours by IHC/ISH with a molecular luminal profile (n = 2063)
| Characteristics | Number of patients n (%) |
|---|---|
| Tumour size (mm) | |
| ≤ 20 | 1451 (71) |
| > 20 but ≤ 50 | 557 (27) |
| > 50 | 46 (2) |
| Missing | 9 |
| Number of positive nodes | |
| 0 | 1440 (71) |
| 1–3 | 509 (25) |
| 4–9 | 66 (3) |
| ≥ 10 | 29 (1) |
| Missing | 19 |
| PRa | |
| Positive | 1780 (86) |
| Negative | 283 (14) |
| Histological grade | |
| 1 | 458 (22) |
| 2 | 1202 (58) |
| 3 | 403 (20) |
| Ki67 | |
| Low (< 14%) | 523 (25) |
| Intermediate (14–19%) | 443 (22) |
| High (≥ 20%) | 1097 (53) |
| Age | |
| < 40 | 14 (1) |
| ≥ 40 but < 50 | 106 (5) |
| ≥ 50 but < 60 | 356 (17) |
| ≥ 60 | 1587 (77) |
| Histopathological tumour type | |
| Ductal/no special type | 1619 (79) |
| Lobular | 295 (14) |
| Other | 148 (7) |
| Missing | 1 |
aPR progesterone receptor. Regarded as positive if defined as positive in the Swedish National Quality Register for Breast Cancer, or a value of PR > 10%