Table 1 Clinico-pathological characteristics of the older breast cancer cohort
|  | All patients (N = 871) | |
|---|---|---|
Number | Percent | |
Primary tumour characteristics | ||
Estrogen receptor status | ||
 Positive | 760 | 87.3 |
 Negative | 111 | 12.7 |
Progesterone receptor status | ||
 Positive | 410 | 47.1 |
 Negative | 265 | 30.4 |
 Unknown | 196 | 22.5 |
HER2 | ||
 Positive | 71 | 8.2 |
 Negative | 566 | 64.9 |
 Unknown | 234 | 26.9 |
Nodal status | ||
 Negative | 441 | 50.6 |
 Positive | 366 | 42.1 |
 Unknown | 64 | 7.3 |
Elston-Ellis tumour grade | ||
 1 | 96 | 11.0 |
 2 | 387 | 44.4 |
 3 | 323 | 37.1 |
 Unknown | 65 | 7.5 |
Tumour size (cm) | ||
 \(<\) 2 | 212 | 24.3 |
\(\ge\) 2 | 604 | 69.3 |
 Unknown | 55 | 6.4 |
Treatment | ||
 Chemotherapy | 34 | 3.9 |
 Hormonal therapy | 482 | 55.3 |
 Chemo + hormonal Therapy | 16 | 1.8 |
 Untreated | 264 | 30.4 |
 Unknown | 75 | 8.6 |