Prevalence of first degree family history according to selected factors in BCDDP endometrial cancer follow up study, 1979–1998
| Risk factor | No 1st degree family history of breast cancer (%) | 1st degree family history of breast cancer (%) | Unsure 1st degree family history of breast cancer (%) | Total person years |
|---|---|---|---|---|
| Attained age (y) | ||||
| <50 | 85.0 | 14.0 | 1.0 | 47 881 |
| 50–54 | 83.1 | 15.4 | 1.6 | 72 040 |
| 55–59 | 81.6 | 16.5 | 1.9 | 100 680 |
| 60–64 | 80.3 | 17.7 | 2.0 | 101 318 |
| 65–69 | 78.9 | 19.0 | 2.1 | 82 058 |
| 70–74 | 77.7 | 20.1 | 2.2 | 55 842 |
| 75+ | 75.7 | 21.8 | 2.5 | 58 927 |
| Race | ||||
| White | 79.7 | 18.3 | 1.9 | 451 128 |
| Hispanic | 85.2 | 12.5 | 2.3 | 11 692 |
| Black | 83.7 | 14.5 | 1.7 | 19 998 |
| Other | 84.6 | 13.8 | 1.6 | 35 930 |
| Body mass index (kg/m2) | ||||
| <22.05 | 81.1 | 17.3 | 1.6 | 185 058 |
| 22.05–25.07 | 80.3 | 17.6 | 2.1 | 154 982 |
| 25.08–27.85 | 79.8 | 18.2 | 2.0 | 80 203 |
| 27.86–32.06 | 79.6 | 18.1 | 2.3 | 53 369 |
| 32.07+ | 78.8 | 19.0 | 2.2 | 26 508 |
| Unknown | 79.6 | 18.6 | 1.8 | 18 625 |
| Personal history of breast cancer | ||||
| No | 81.3 | 16.8 | 1.9 | 468 590 |
| Yes | 71.4 | 26.3 | 2.3 | 50 157 |
| Menopausal status | ||||
| Premenopausal | 83.5 | 15.1 | 1.4 | 65 740 |
| Menopausal | 79.9 | 18.1 | 2.0 | 437 138 |
| Unknown | 79.9 | 17.3 | 2.8 | 15 869 |
| 1st degree family size | ||||
| <4 | 82.6 | 15.4 | 2.0 | 237 784 |
| 4–5 | 78.1 | 20.3 | 1.6 | 134 371 |
| 6–7 | 74.9 | 23.5 | 1.6 | 50 616 |
| 8+ | 71.3 | 26.7 | 2.0 | 20 526 |
| Unknown | 83.5 | 14.2 | 2.3 | 75 451 |