Correction: Mammograms story

Correction: Mammograms story

LOS ANGELES — In a Sept. 22 story about a mammogram study, The Associated Press reported erroneously that researchers found that women over 50 who had mammograms had a 10 percent lower risk of death from breast cancer and that a third of that reduction was due to mammography.

Instead, the data showed that women who had mammograms had a 28 percent reduction in breast cancer deaths. Just 10 percent of the reduced deaths could be credited to mammograms, with the rest due to better treatments.