Primary treatment | BCA cohort (n = 308) | HER2-amplified BCA cohort (n = 177) | ||
---|---|---|---|---|
n | % | n | % | |
Breast surgery | ||||
Mastectomy (ablation) | 161 | 52.4 | 101 | 57.1 |
Conservative surgery (resection) | 146 | 47.6 | 72 | 40.7 |
No operation | 3 | 0.6 | ||
Unknown | 1 | |||
Post-operative radiotherapy | 198 | 65.3 | 110 | 62.1 |
No | 105 | 34.7 | 67 | 37.9 |
Unknown | 5 | |||
Adjuvant endocrine therapy | 97 | 32.1 | 104 | 58.8 |
No | 205 | 67.9 | 73 | 41.2 |
Unknown | 6 | |||
Adjuvant chemotherapy | 40 | 13.4 | 133 | 75.1 |
No | 259 | 86.6 | 44 | 24.9 |
Unknown | 9 | |||
Adjuvant trastuzumab | 82 | 46.3 | ||
No | 308 | 100.0 | 95 | 53.7 |