Mammographic parenchymal features and @entity0 in the XXXX detection demonstration project.

@entity1 @entity204 @entity0 @entity1560
The Breast Cancer Detection Demonstration Project (BCDDP) screened 283,222 U.S. @entity1 for @entity0 by use of mammography and breast palpation. A sample of @entity1 was followed up to determine the subsequent occurrence of @entity0 cases and @entity204 . We have used information from the BCDDP to evaluate the relation of mammographic parenchymal features to the incidence of and mortality from @entity0 , and to examine changes in this relation with duration of follow-up. We also reevaluated the relations of age, body weight, height, menopause, parity, and age at birth of first @entity1 to mammographic features of breast tissue. Among @entity1 35-49 years of age at entry, those whose mammographic features were "glandular" or "homogeneously dense" had a 2.8-fold increase in risk of @entity0 compared to @entity1 whose mammographic features were " @entity1560 ". The increased risk was observed up to 9 years after entry. Among @entity1 50-74 years of age at entry, the risk of @entity0 was elevated by a factor of 1.7 for @entity1 with glandular or dense breast parenchyma compared to those with @entity0 . The increase in risk, however, diminished with increasing follow-up. The percentage of @entity1 with glandular or dense parenchymal features decreased as age, body weight, and parity increased. The percentage with glandular or dense features increased as height increased, and the percentage decreased with menopause. Mammographic parenchymal features were not associated with age at birth of first @entity1 .
