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Table 5 Characteristics of the study cohort: history of breast disease

From: Predictors of competing mortality to invasive breast cancer incidence in the Canadian National Breast Screening study

Variable

n = 89434(%)

Ever been told to have breast cancer

 

 Yes

115 (0.13)

 No

89319 (99.87)

Ever noted lumps in breasts

 

 Yes

5139 (5.75)

 No

84295 (94.25)

Ever noted pain in breasts

 

 Yes

14951 (16.72)

 No

74483 (83.28)

 Ever noted discharge from breasts

 

 Yes

1881 (2.10)

 No

87553 (97.90)

Families with breast cancer score (mean±SD)

14.77(±21.22)

Ever have/had other types of breast disease

 

 Yes

14363 (16.06)

 No

75071 (83.94)

Abnormality in left breast found by nurse

 

 Yes

14769 (16.51)

 No

74665 (83.49)

Abnormality in right breast found by nurse

 

 Yes

13748 (15.37)

 No

75686 (84.63)

Female relatives with breast cancer

 

 Yes

31574 (35.30)

 No

57860 (64.70)