|  |  | Placebo group | Tamoxifen group | ||
---|---|---|---|---|---|---|
Variable | risk group | cancer | at risk | cancer | at risk | |
age at entry | 1 | ≤ 49 | 68 | 10149 | 38 | 10045 |
 | 2 | 50–59 | 50 | 7912 | 25 | 8040 |
 | 3 | >60 | 57 | 7719 | 26 | 7782 |
predicted risk | 1 | ≤ 2.00% | 35 | 6318 | 13 | 6311 |
 | 2 | 2.01–3.01% | 42 | 8108 | 29 | 8262 |
 | 3 | 3.01–5.00% | 43 | 7313 | 27 | 6959 |
 | 4 | ≤ 5.01% | 55 | 4142 | 20 | 4425 |
family risk | 1 | 0 | 38 | 5891 | 17 | 5724 |
 | 2 | 1 | 90 | 15000 | 46 | 15182 |
 | 3 | 2 | 37 | 4263 | 20 | 4211 |
 | 4 | 3 | 10 | 729 | 6 | 855 |