From: Frequency of BRCA1 and BRCA2 causative founder variants in ovarian cancer patients in South-East Poland
Number of cases
Number with a mutation
Proportion with a mutation (%)
Age group
≤ 50
31
3
9.7
> 50
127
7
5.5
Family history
Positive
39
6
15.4
Negative
119
4
3.4
All cases together
158
10
6.3