Changes to This Summary (03/30/2012)

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.

Effect of Screening on Breast Cancer Mortality ¹

Added text ² about an ecologic study that compared three pairs of neighboring European countries and found that each country had a reduction in breast cancer mortality, with no difference between matched pairs that could be attributed to screening (cited Autier et al. as reference 31).

Added text ³ about a systematic review that examined ecologic and large cohort studies of women aged 50 to 69 years and found that any relative reduction in breast cancer mortality due to screening in this age group would likely be no greater than 10% (cited Harris et al. as reference 32).