Association between breast cancer status and number of mammograms before diagnosis (affected within 1 year of enrollment) or questionnaire (unaffected)
| Gene . | Affected carriers (n) . | Unaffected carriers (n) . | OR (95% CI)* . | P . |
|---|---|---|---|---|
| BRCA1 and BRCA2 combined | 34 | 128 | 0.94 (0.88-1.00) | 0.06 |
| BRCA1 | 17 | 69 | 0.99 (0.90-1.10) | 0.84 |
| BRCA2 | 17 | 59 | 0.91 (0.83-1.00) | 0.06 |
| Gene . | Affected carriers (n) . | Unaffected carriers (n) . | OR (95% CI)* . | P . |
|---|---|---|---|---|
| BRCA1 and BRCA2 combined | 34 | 128 | 0.94 (0.88-1.00) | 0.06 |
| BRCA1 | 17 | 69 | 0.99 (0.90-1.10) | 0.84 |
| BRCA2 | 17 | 59 | 0.91 (0.83-1.00) | 0.06 |
OR adjusted for age at diagnosis (affected) or questionnaire (unaffected).