From: The International BRCA1 /2Carrier Cohort Study: Purpose, Rationale, and Study Design
 |  | Breast Cancer | Ovarian Cancer | ||
---|---|---|---|---|---|
Risk Ratio | Exposure Frequency | 5 yrs | 10 yrs | 5 yrs | 10 yrs |
2 | 0.1 | 0.64 | 0.87 | Not done | Not done |
 | 0.3 | 0.80 | 0.98 | Not done | Not done |
3 | 0.1 | 0.95 | 1.00 | 0.48 | 0.68 |
 | 0.3 | 0.98 | 1.00 | 0.56 | 0.82 |
5 | 0.1 | 1.00 | 1.00 | 0.76 | 0.93 |
 | 0.3 | 1.00 | 1.00 | 0.81 | 0.97 |