Breast cancer risk ratio of relatives of breast cancer probands according to age of relative and degree of relationship
| Age of relative | 1st degree | 2nd degree | 3rd degree | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| No of cases | Risk ratio (95% CI) | No of cases | Risk ratio (95% CI) | No of cases | Risk ratio (95% CI) | ||||||
| 20–29 | 2 | 2.75 (0.33–9.92) | 5 | 4.52 (1.46–10.5) | 0 | ||||||
| 30–39 | 24 | 3.70 (2.37–5.51) | 22 | 2.17 (1.36–3.28) | 27 | 2.02 (1.33–2.95) | |||||
| 40–49 | 60 | 2.81 (2.16–3.65) | 66 | 1.94 (1.51–2.82) | 77 | 1.86 (1.50–2.34) | |||||
| 50–59 | 57 | 2.12 (1.61–2.75) | 70 | 1.56 (1.22–1.98) | 75 | 1.51 (1.21–1.90) | |||||
| 60–69 | 60 | 2 09 (1.61–2.71) | 74 | 1.35 (1.07–1.71) | 72 | 1.50 (1.18–1.89) | |||||
| 70–79 | 37 | 2.03 (1.43–2.78) | 59 | 1.31 (1.01–1.71) | 38 | 1.37 (0.96–1.88) | |||||
| 80+ | 15 | 1.34 (0.75–2.20) | 48 | 1.33 (0.98–1.76) | 20 | 1.27 (0.78–1.96) | |||||