BRCA2 and breast cancer: Among the group who entered the MRI-screening program, the age-adjusted HR for breast cancer mortality was 0.20 (95% CI: 0.10 - 0.43; P < 0.001) for women with BRCA1 and 0.87 (95% CI: 0.10 - 17.25; P = 0.93) for women with BRCA2 variants [37].