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Family history of female breast cancer among first- and second-degree relatives of affected and unaffected women
| Family history of breast cancer | Affected with breast cancer | Unaffected |
|---|---|---|
| No familial female breast cancer | 54,602 (42.0%) | 80,266 (21.6%) |
| Dx age ≤ 45 | 18,948 (14.6%) | 145,133 (39.1%) |
| Dx age > 45 | 42,014 (32.3%) | 109,548 (29.5%) |
| Breast cancer with missing age | 14,587 (11.2%) | 36,647 (9.9%) |
Dx, diagnosis
