FIG 1.
Composite score development flowchart. EHR, electronic health record; NDI, National Death Index; SSDI, Social Security Death Index.
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.