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Table 3 History of breast disease, including breast cancer, in 121 000 respondents to the Million Women Study and their relatives

From: The Million Women Study: design and characteristics of the study population

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