Characteristics of the breast cancer cohort
| Parameters | Number of cases (%) |
| Age | |
| >50 years | 1098 (65.6) |
| ≤50 years | 549 (32.8) |
| Unknown | 28 (1.7) |
| Tumour size | |
| >2.0 cm | 588 (35.1) |
| ≤2.0 cm | 1058 (63.2) |
| Unknown | 29 (1.7) |
| Lymphovascular invasion | |
| Negative | 1197 (71.5) |
| Positive | 450 (26.9) |
| Unknown | 28 (1.7) |
| Lymph node status | |
| Negative | 1132 (67.6) |
| Positive | 515 (30.7) |
| Unknown | 28 (1.7) |
| Lymph node stage | |
| 1 | 1027 (62.4) |
| 2 | 457 (27.3) |
| 3 | 162 (9.7) |
| Unknown | 29 (1.7) |
| Nottingham Prognostic Index | |
| Good | 568 (33.9) |
| Moderate | 820 (49) |
| Poor | 256 (15.3) |
| Unknown | 31 (1.9) |
| Histologic types | |
| Ductal no special type | 1258 (75.1) |
| Lobular | 102 (6.1) |
| Tubular/invasive cribriform | 60 (3.6) |
| Pure mucinous | 22 (1.3) |
| Invasive micropapillary | 13 (0.8) |
| Other types including medullary-like | 220 (13.1) |
| Distant metastasis | |
| Yes | 357 (21.3) |
| No | 1288 (76.9) |
| Unknown | 30 (1.6) |
| Outcome status at end of follow-up | |
| Alive | 1190 (71) |
| Died from breast cancer | 297 (17.7) |
| Died from other causes | 156 (9.3) |
| Unknown | 32 (1.9) |