“The mortality rate for U.S. women with breast cancer fell an estimated 58 percent from 1975 to 2019, according to research published in JAMA that credits the decline to advances in screening and treatments.

Nearly half (47 percent) of the reduction was attributed to earlier and more effective treatment of those with Stage 1, 2 or 3 breast cancer. (With staging, generally the lower the number, the less the cancer has spread.)

In addition, about 25 percent of the drop was attributed to improved mammography screening and about 29 percent to better treatment of metastatic breast cancer, meaning cancer that has spread.”

From Washington Post.