Subject characteristics
| Affected | Unaffected | |
|---|---|---|
| Total No | 27 | 23 |
| Breast ca | 23 | |
| Bilateral breast ca | 2 | |
| DCIS | 2 | |
| Ovarian ca | 1 | |
| Breast and ovarian ca | 1 | |
| Average age at study entry X, SD (range) | 45, 14 (24–77) | 41, 10 (26–65) |
| Age at cancer diagnosis | 40, 10 (22–58) | |
| Oral contraceptive use | 7/27 (26%) | 4/18 (17%) |
| Hormone replacement therapy use | 1 | 1 |
| ≥1 FDR with breast or ovarian ca | 10 | 23 |
| Ethnicity | Affected and unaffected combined | |
|---|---|---|
| White | 40 | |
| Mixed heritage | 6 | |
| Hispanic | 2 | |
| African American | 1 | |
| Asian | 1 | |