The relation between radiographic features and determinants of risk of breast cancer

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Abstract
Mammograms were obtained from 942 normal women aged over 30 yr, and were classified by Wolfe''s criteria. In women with an enhanced risk of breast cancer associated with a late age at first child or nulliparity, there was a significant increase in the proportion of P2 and DY mammographic patterns which are thought to be a radiological index of risk. There was a decrease in the proportion of P2 and DY grades in women using steroidal contraceptives. The association between radiological and epidemiological determinants of risk did not hold for age at menarche.