From: Germline breast cancer susceptibility gene mutations and breast cancer outcomes
Risk factors | Mutation rate | OR (95% CI)* | P-value | |
---|---|---|---|---|
Family history†| Yes | 16.2% (37/228) | 1.60 (0.90–2.88) | 0.113 |
No | 11.1% (28/252) | Â | Â | |
Age of onset | ≤ 40 | 12.7% (33/260) | 1.26 (0.69–2.31) | 0.452 |
 | >  40 | 13.6% (27/198) |  |  |
Triple negative breast cancer | Yes | 14.2% (18/127) | 1.27 (0.67–2.42) | 0.469 |
No | 13.3% (47/353) | Â | Â | |
Bilateral breast cancer | Yes | 29.6% (16/54) | 3.27 (1.64–6.51) | 0.0008 |
No | 11.5% (49/426) | Â | Â | |
Breast and ovarian cancer | Yes | 50% (2/4) | 5.90 (0.70–49.6) | 0.103 |
No | 13.0% (63/476) | Â | Â | |
Male breast cancer | Yes | 16.7% (1/6) | 2.35 (0.25–21.9) | 0.454 |
No | 13.1% (64/474) | Â | Â | |
No. of risk factors | 1 | 10.4% (32/309) | 1.82 (1.25–2.64) | 0.002 |
 | 2 | 18.4% (27/147) |  |  |
 | 3 | 19.1% (4/21) |  |  |
 | 4 | 50% (1/2) |  |  |
 | 5 | 100% (1/1) |  |  |
All subjects | Â | 13.5% (65/480) | Â | Â |