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.
First (dotted line) and third (continuous line) quartile evolution of breast density percentage when using a the entire database or b split according to the BI-RADS categories (from left top to bottom right: BI-RADS I, BI-RADS II, BI-RADS III and BI-RADS IV). S0 contains the initial follow-up exams, S1 contains the second follow-up and S2 contains the third follow-up. Note the differences between the density categories
