From: The Million Women Study: design and characteristics of the study population
Characteristic | Percentage |
---|---|
Previous screening for breast cancer | Â |
   Yes | 79.0 |
   No | 20.2 |
   Missing | 0.8 |
Previous surgery for breast disease | Â |
   Yes | 12.8 |
   No | 86.4 |
   Missing | 0.8 |
Previous breast cancer | Â |
   Yes | 1.4 |
   No | 98.0 |
   Missing | 0.6 |
History of maternal breast cancer | Â |
   Yes | 6.0 |
   No | 90.7 |
   Not known | 2.7 |
   Missing | 0.6 |
History of breast cancer in a sister | Â |
   Yes | 3.7 |
   No | 55.1 |
   No sister | 38.6 |
   Not known | 1.9 |
   Missing | 0.8 |