Figure 1.
A schematic overview of the studied population. CPAP = continuous positive airway pressure; NIV = noninvasive ventilation; DNR = “do not resuscitate” order; DNI = “do not intubate” order.
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.