From: Efficacy prediction of noninvasive ventilation failure based on the stacking ensemble algorithm and autoencoder
Before NIV (H0)
After 1 h of NIV (H1)
Unit
Oxygenation index/H0RR
H1oxygenation index/H1RR
mmHg/breath/min
Age*H0RR
Age*H1RR
year*breath/min
H0RR*H0HR
H1RR*H1HR
breath/min*beat/min
H0RR*H0HR*H0FIO2
H1RR*H1HR*H1FIO2