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.
Abbreviations: CT, computed tomography; LOS, length of stay (in days); PDX, principal diagnosis; POA, present on admission; SDX, secondary diagnosis.
aPatients with viral pneumonia as principal diagnosis but without initial antibiotic treatments were included.
bOn a 1-patient 1-admission basis, with a single eligible admission randomly selected from each patient's eligible admissions (178 hospitals).
