Table 3.
History of breast disease, including breast cancer, in 121 000 respondents to the Million Women Study and their relatives
| Characteristic | Percentage |
| Previous screening for breast cancer | |
| Yes | 79.0 |
| No | 20.2 |
| Missing | 0.8 |
| Previous surgery for breast disease | |
| Yes | 12.8 |
| No | 86.4 |
| Missing | 0.8 |
| Previous breast cancer | |
| Yes | 1.4 |
| No | 98.0 |
| Missing | 0.6 |
| History of maternal breast cancer | |
| Yes | 6.0 |
| No | 90.7 |
| Not known | 2.7 |
| Missing | 0.6 |
| History of breast cancer in a sister | |
| Yes | 3.7 |
| No | 55.1 |
| No sister | 38.6 |
| Not known | 1.9 |
| Missing | 0.8 |