Table 1. Descriptive characteristics of the ABCFR cohort of 4176 women unaffected with breast cancer at baseline.
Unaffected after 10 years | Censored | Breast cancer within 10 years | Total | |
---|---|---|---|---|
Overall |
3452 |
609 |
115 |
4176 |
Age group | ||||
20–29 | 621 | 19 | 2 | 642 |
30–39 | 856 | 27 | 16 | 899 |
40–49 | 755 | 44 | 27 | 826 |
50–59 | 663 | 55 | 31 | 749 |
60–69 | 516 | 86 | 32 | 634 |
70–79 |
41 |
378 |
7 |
426 |
Relationship to the index case–control | ||||
Sister | 1261 | 81 | 45 | 1387 |
Mother | 347 | 179 | 22 | 548 |
Aunt | 435 | 274 | 22 | 731 |
Other |
1409 |
75 |
26 |
1510 |
Number of relatives with reported breast cancer | ||||
0 First degree | 1403 | 283 | 34 | 1720 |
1 First and 0 second degree | 1186 | 162 | 35 | 1383 |
1 First and 1+ second degree | 554 | 89 | 24 | 667 |
2+ First degree |
309 |
75 |
22 |
406 |
Study type | ||||
Families of index cases | 2133 | 486 | 85 | 2704 |
Families of index controls/Ashkenazis/twins | 1319 | 123 | 30 | 1472 |
Abbreviation: ABCFR=Australian Breast Cancer Family Registry.