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.
Upper tertile: squares. Middle tertile: triangles. Lower tertile: circles. Full symbols indicate individuals with CDR=0; open symbols represent individuals with CDR=0.5. CDR: Clinical Dementia Rating Scale
