In the context of bad publicity for screening mammography, what has screenings effect on breast cancer mortality been in the USA?
“The death rate from breast cancer had been unchanged for 50 years until the onset of mammography screening in the U.S. in the mid-1980s. Now, there are 15,000 to 20,000 fewer deaths from breast cancer each year than in the pre-screening era. “ Kopans. 2006.
The mortality from breast cancer in the USA is almost 30% lower today than it was from after the Second World war. This mortality was unchanged from 1945 to the late 80's when screening was instituted.