| Derivation (Auckland) | Validation (Waikato) |
---|---|---|
Total number of women with invasive cancer | 10,586 | 3071 |
Number of complete cases | 9182 | 2625 |
Number of deaths due to breast cancer | 864 | 282 |
Median follow-up time (in months) | 67.6 | 68.4 |
Age (mean in years) | 56.9 | 59.3 |
Tumour grade | ||
 Well differentiated | 2229 (24%) | 624 (24%) |
 Moderately differentiated | 4108 (45%) | 1406 (53%) |
 Poorly differentiated | 2845 (31%) | 595 (23%) |
Tumour size (mean in mm) | 23.9 | 22.4 |
Mean number of positive lymph nodes removed | 2.4 | 1.9 |
Stage of tumour | ||
 Stage 1 | 3990 (43%) | 1071 (41%) |
 Stage 2 | 3602 (39%) | 1117 (42%) |
 Stage 3 | 1432 (16%) | 391 (15%) |
 Stage 4 (presence of metastasis) | 158 (2%) | 46 (2%) |
ER status | ||
 Negative | 1914 (21%) | 410 (16%) |
 Positive | 7268 (79%) | 2215 (84%) |
PR status | ||
 Negative | 2919 (32%) | 903 (34%) |
 Positive | 6270 (68%) | 1722 (66%) |
HER2 status | ||
 Positive | 1156 (13%) | 378 (14%) |
 Negative/equivocal | 6331 (69%) | 1750 (67%) |
 Test not done | 1695 (18%) | 497 (19%) |
Histological type of tumour | ||
 Ductal | 7469 (81%) | 2130 (81%) |
 Lobular | 1072 (12%) | 294 (11%) |
 Mixed | 641 (7%) | 201 (8%) |
Lymphovascular invasion status | ||
 Negative | 6730 (73%) | 1939 (74%) |
 Positive | 2452 (27%) | 686 (26%) |
Ethnicity | ||
 Maori | 720 (8%) | 388 (15%) |
 Pacific | 682 (7%) | 40 (2%) |
 European NZ | 6527 (71%) | 2131 (81%) |
 Other | 1253 (14%) | 66 (2%) |