| Variable | ≤25 years | 26 - 35 | 36 - 45 | 46 - 55 | ≥56 | Total |
| Inheritance as a risk for BC |
|
|
|
|
| |
| Yes | 21 | 93 | 49 | 24 | 8 | 195 |
| No | 63 | 164 | 96 | 67 | 18 | 408 |
| Total | 84 | 257 | 145 | 91 | 26 | 603 |
| Early puberty and late menopause are risk factors for BC |
|
| ||||
| Increase the risk of BC | 14 | 91 | 55 | 21 | 9 | 190 |
| Decrease the risk of BC | 16 | 29 | 20 | 11 | 2 | 78 |
| Do nothing | 63 | 141 | 74 | 62 | 15 | 355 |
| Total | 93 | 261 | 149 | 94 | 26 | 623 |
| Delayed childbirth is a risk |
|
|
|
|
| |
| Increase the risk of BC | 9 | 71 | 50 | 10 | 8 | 148 |
| Decrease the risk of BC | 13 | 29 | 26 | 16 | 4 | 88 |
| Do nothing | 71 | 162 | 73 | 69 | 14 | 389 |
| Total | 93 | 262 | 149 | 95 | 26 | 625 |
| Natural breastfeeding |
|
|
|
|
| |
| Increase the risk of BC | 5 | 8 | 10 | 4 | 4 | 31 |
| Decrease the risk of BC | 61 | 215 | 115 | 66 | 15 | 472 |
| Do nothing | 27 | 38 | 22 | 25 | 7 | 119 |
| Total | 93 | 261 | 147 | 95 | 95 | 622 |
| Hormonal usage |
|
|
|
|
| |
| Increase the risk of BC | 26 | 125 | 71 | 35 | 12 | 269 |
| Decrease the risk of BC | 8 | 54 | 24 | 11 | 3 | 100 |
| Do nothing | 57 | 82 | 52 | 46 | 11 | 128 |
| Total | 91 | 261 | 147 | 92 | 26 | 617 |