Study Participant Characteristics
| Characteristic | No. | % |
|---|---|---|
| Age, y | ||
| 40–49 | 11 | 12 |
| 50–59 | 18 | 20 |
| 60–69 | 33 | 37 |
| 70–80 | 27 | 30 |
| Menopausal status | ||
| Premenopausal | 16 | 18 |
| Postmenopausal | 73 | 82 |
| Previous hysterectomy | ||
| Yes | 35 | 39 |
| No | 54 | 61 |
| First degree relative(s) with breast cancer | ||
| Yes | 37 | 42 |
| No | 52 | 58 |
| History of atypical hyperplasia in the breast | ||
| Yes | 3 | 3 |
| No | 86 | 97 |
| 5-year predicted breast cancer risk,4 % | ||
| <2.00 | 49 | 55 |
| 2.01–3.00 | 20 | 22 |
| 3.01–5.00 | 15 | 17 |
| >5.00 | 5 | 5 |
| Evidence for a net benefit with tamoxifen10 | ||
| No evidence | 16 | 18 |
| Moderate evidence | 3 | 3 |
| Strong evidence | 70 | 79 |
| Total | 89 | 100 |