Population of Women at Increased Risk for Breast Cancer
| Risk factor | Increased-risk population (n = 849) | BSGI-positive population (n = 212) | Malignant population (n = 14) |
| Family history | 230 (27.1%) | 67 (31.6%) | 7 (50.0%) |
| Personal history | 430 (50.7%) | 89 (41.98%) | 1 (7.1%) |
| Atypia | 54 (6.4%) | 20 (9.4%) | 2 (14.3%) |
| BRCA1/2 | 2 (0.2%) | 0 (0.0%) | 0 (0.0%) |
| Family + personal history | 83 (9.8%) | 19 (9.0%) | 1 (7.1%) |
| Family history + atypia | 28 (3.3%) | 13 (6.1%) | 2 (14.3%) |
| Personal history + atypia | 10 (1.2%) | 2 (0.9%) | 0 (0.0%) |
| Family history + BRCA1/2 | 6 (0.7%) | 1 (0.5%) | 0 (0.0%) |
| Personal history + BRCA1/2 | 2 (0.2%) | 1 (0.5%) | 1 (7.1%) |
| 3 or more risk factors | 4 (0.5%) | 0 (0.0%) | 0 (0.0%) |