Parameter | Population-based case probandsb (n = 5250) | Clinic-based affected probandsb (n = 1529) | Total probandsb (n = 6779) |
---|---|---|---|
Age at diagnosis | Â | Â | Â |
   <30 years | 132 | 45 | 177 |
   30–39 years | 1049 | 300 | 1349 |
   40–49 years | 1809 | 585 | 2394 |
   50–59 years | 1610 | 344 | 1954 |
   ≥ 60 years | 650 | 255 | 905 |
Race/ethnicity | Â | Â | Â |
   White | 3604 | 1278 | 4882 |
   African-American | 381 | 45 | 426 |
   Latino | 330 | 105 | 435 |
   Chinese | 248 | 21 | 269 |
   Japanese | 66 | 0 | 66 |
   Filipino | 227 | 0 | 227 |
   Other Asian or Pacific Islander | 122 | 7 | 129 |
   Mixed or other race | 130 | 66 | 196 |
   Not reported | 142 | 7 | 149 |
Ashkenazi Jewish heritage | 232 | 808 | 1040 |
History of second breast cancer | 261 | 233 | 494 |
History of breast and ovarian cancer | 22 | 43 | 65 |
Family history of breast cancer in one or more first-degree relatives | 1677 | 655 | 2332 |