Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Cumulative risk of dying according to age for women invited to screening from age 50 years (red graph) and for women who are not invited (green graph) assuming screening reduces breast cancer mortality by 20% and does not increase deaths from other causes. Based on data for England and Wales for 2009 from Office for National Statistics. Reproduced with permission from Paul Pharoah.
