Family characteristics | Relative risk at age 30 * | 95% C.I. of relative risk at age 30 | Change of relative risk per 10 years ** | Overall Significance *** |
---|---|---|---|---|
≥ 2 cases of female breast cancer in first or second-degree relatives (yes vs. no) | 3.09 | 1.28–7.44 | 0.745 | |
≥ 2 cases of female breast cancer under age 50 (yes vs. no) | 3.36 | 1.12–10.08 | 0.489 | |
≥ 1 case of female breast cancer under age 40 (yes vs. no) | 2.06 | 0.83–5.12 | 1.000 | |
Bilateral breast cancer in affected sister (index patient) (yes vs. no) | 3.47 | 1.33–9.05 | 0.834 | < .001 |
Model score **** | ||||
0 ***** | 1 | |||
1 | 2.01 | (0.89–4.55) | 0.942 | |
≥ 2 | 10.62 | (4.22–26.72) | 0.430 | <.001 |