Table 1.
Cases (n = 1445) | Controls (n = 827) | |
---|---|---|
Age at diagnosis (years) | 42 [23–59] | n/a |
Age at recruitment (years) | 43 [23–60] | 41 [20–60] |
Ethnicity | ||
White/Caucasian | 1345 (93%) | 710 (85.9%) |
Asian and Pacific Islander | 85 (5.9%) | 32 (3.9%) |
Other | 8 (0.6%) | 7 (0.8%) |
Unknown | 7 (0.5%) | 78 (9.4%) |
Laterality | ||
Right breast | 713 (49.3%) | n/a |
Left breast | 732 (50.7%) | n/a |
Estrogen Receptor Status | ||
Negative | 439 (30.4%) | n/a |
Positive | 815 (56.4%) | n/a |
Unknown | 191 (13.2%) | n/a |
Grade | ||
GI | 212 (14.6%) | n/a |
GII | 526 (36.4%) | n/a |
GIII | 555 (38.4%) | n/a |
GIV | 3 (0.2%) | n/a |
Unknown | 149 (10.4%) | n/a |
n/a: not applicable
GI, grade I; GII, grade II; GIII, Grade III; GIV, Grade IV