Family characteristics | Relative risk at age 30** | 95% C.I. relative risk at of 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) | 2.20 | 1.15–4.22 | 0.851 | P = .013 |
≥ 2 cases of female breast cancer in first-degree relatives (yes vs. no) | 4.28 | 1.89–9.70 | 0.624 | P = .001 |
≥ 1 case of female breast cancer under age 50 (yes vs. no) | 2.82 | 1.43–5.57 | 0.800 | P = .001 |
≥ 2 cases of female breast cancer under age 50 (yes vs. no) | 5.81 | 2.16–15.60 | 0.825 | P = .002 |
≥ 1 case of female breast cancer under age 40 (yes vs. no) | 3.21 | 1.36–7.56 | 0.825 | P = .001 |
Bilateral breast cancer in affected sister (index patient) (yes vs. no) | 4.00 | 1.55–10.32 | 0.784 | P = .000 |
Ovarian cancer (yes vs. no) | 2.72 | 0.58–12.83 | 0.801 | P = .294 |
DCIS in affected sister (index patient) (yes vs. no) | 0.89 | 0.30–2.63 | 1.184 | P = .412 |