Changes to This Summary (12/05/2013)
The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.
Added text about a U.S. ecologic analysis that examined the incidence of early-stage versus late-stage breast cancer for women aged 40 years and older and reported that the absolute increase in the incidence of early-stage cancer was 122 cancers per 100,000 women, while the absolute decrease in late-stage cancers were 8 cases per 100,000 women; a major limitation of this and other ecologic studies is the failure to account for actual exposure to screening (cited Bleyer et al. as reference 20).
Revised text to state that a second Digital Mammographic Imaging Screen Trial report found that film mammography had a higher area under the curve in women aged 65 years and older; however, it was not statistically significant when the multiple comparisons were considered.
This summary is written and maintained by the PDQ Screening and Prevention Editorial Board, which is editorially independent of NCI. The summary reflects an independent review of the literature and does not represent a policy statement of NCI or NIH. More information about summary policies and the role of the PDQ Editorial Boards in maintaining the PDQ summaries can be found on the About This PDQ Summary and PDQ NCI's Comprehensive Cancer Database pages.