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.
Receiver-operating characteristic (ROC) curves show the diagnostic performance of E/I using dN2 as a functional test of airway obstruction (dN2 cut-off = 2.5% N2/l). The best threshold is reported, alongside the sensitivity and specificity: E/I MLD = 0.89 (0.70; 0.73) – E/I -850–1024 = 0.32 (0.63; 0.67) – E/I -850–910 = 0.29 (0.79; 0.61).
