Table 11 Mutation frequency by age among unaffected daughters of BRCA1 mutation carriers
From: Selected aspects of genetic counselling for BRCA1 mutation carriers
Age group | Number of carriers | Number of non-carriers | Percentage of carriers (%) | p |
|---|---|---|---|---|
0-19 | 12 | 14 | 46.0 | 0.600 |
20-29 | 38 | 18 | 68.0 | 0.008 |
30-39 | 16 | 10 | 61.5 | 0.240 |
40-50 | 9 | 5 | 64.0 | 0.290 |
Total | 75 | 47 | 61.5 | 0.011 |