Results from a seven-year programme of breast self-examination in 89,010 women.

This gives a total of 290 cancers to 336 operations for benign lesions - a malignant to benign operation ratio of 1:1.2. Prognostic factors of cancers detected There is no significant difference between the study and historical control groups in the numbers of in situ carcinomas - 4% in the study group and 3% in the historical control, but there is a marginally significant difference (P<0.05) in the rate of advanced disease - 18% and 13% respectively.

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This group has a highly significant relative risk of dying of 0.66 in comparison with women who did not attend, implying a 34% reduction in mortality in their group.

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