Table 1.
Distribution of cases and controls by age, race or ethnicity, and study center †
| Distributions | Cases, n (%) | Controls, n (%) |
|---|---|---|
| Age range, yr |
|
|
| ≤30 |
108 (8.2%) |
67 (6.0%) |
| 31-35 |
325 (24.8%) |
172 (15.3%) |
| 36-40 |
436 (33.2%) |
237 (21.1%) |
| 41-45 |
443 (33.8%) |
203 (18.1%) |
| 46-50 |
0 (0.0%) |
230 (20.5%) |
| 51-55 |
0 (0.0%) |
212 (18.9%) |
| Total |
1,312 (100.0%) |
1,121 (100.0%) |
| Race or ethnicity |
|
|
| Caucasian |
848 (64.6%) |
967 (86.3%) |
| East Asian |
208 (15.9%) |
71 (6.3%) |
| Latina |
158 (12.0%) |
47 (4.2%) |
| Recent African Ancestry |
98 (7.5%) |
36 (3.2%) |
| Total |
1,312 (100.0%) |
1,121 (100.0%) |
| Study center |
|
|
| BCFR-Australia |
593 (45.2%) |
522 (46.6%) |
| BCFR-Canada |
302 (23.0%) |
463 (41.3%) |
| BCFR-Northern California |
417 (31.8%) |
136 (12.1%) |
| Total | 1,312 (100.0%) | 1,121 (100.0%) |
†The three subjects excluded because of poor mutation-screening performance are not included; percentage data are the percentages of the total number of patient or control DNA in the category indicated that met the mutation-screening quality control criterion; BCFR, Breast Cancer Family Registry.