Figure 1:
Flowchart detailing the inclusion and exclusion process in determining the final study cohort. n = Number, NIS = National Inpatient Sample.
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.