Table 1.
Patient characteristics and event distribution in relation to patient, clinical, tumor and treatment factors
| Characteristic | No. of patients |
|---|---|
| Age, y | |
| [29-39] | 52 (5.7%) |
| [40-49] | 227(24.7%) |
| [50-69] | 512(55.7%) |
| ≥ 70 | 128(13.9%) |
| Total | 919 |
| Histological size of the tumor (mm) | |
| 25th quartile | 11.0 |
| Median | 15.0 |
| 75th quartile | 20.0 |
| Range | 1-45 |
| Total | 881 |
| Extensive intraductal component (EIC) | |
| -No | 866 (94.2%) |
| -Yes | 53 (5.8%) |
| Total | 919 |
| Grade | |
| - Grade 1 | 324 (40.0%) |
| - Grade 2 | 355 (43.8%) |
| - Grade 3 | 131 (16.2%) |
| Total | 810 |
| # positive nodes | |
| - 0 | 549 (62.8%) |
| - 1-3 | 247 (28.3%) |
| - ≥4 | 78 (8.9%) |
| Total | 874 |
| Lympho-vascular invasion | |
| - No | 667 (75.8%) |
| - Yes | 213 (24.2%) |
| Total | 880 |
| Surgical excision margin status | |
| - Clear (ref) | 549 (63.7%) |
| - Invasion | 313 (36.3%) |
| Total | 862 |
| Progesterone receptor status | |
| - Positive | 459 (55.0%) |
| - Negative | 376 (45.0%) |
| Total | 835 |
| Estrogen receptor status | |
| - Positive | 657 (21.5%) |
| - Negative | 180 (78.5%) |
| Total | 837 |
| Treatment combination | |
| - Radiotherapy | 586 (63.8%) |
| - Radio- and chemotherapy | 129 (14.1%) |
| - Radio- and hormonal therapy | 183 (19.9%) |
| - Radio- and chemo- and hormonal therapy | 20 (2.2%) |
| Total | 918 |