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.
Cumulative frequency distribution of median PEEP, tidal volume, compliance and driving pressure at start day of invasive ventilation. Mean values were calculated from three or four measurements available on the first day of ventilation. The Kruskal-Wallis test was used to calculate p-values.
