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.
*Models adjusted for age, sex, race, comorbidities (using the Elixhauser method), hospital bed number, urban vs. rural location, region, and teaching status
