Figure 4.
Mortality (a) and intubation (b) for included studies.
HFNC, high-flow nasal cannula; NIV, noninvasive ventilation.
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.