From: Relation between PaO2/FiO2 ratio, SpO2/FiO2 ratio, oxygenation index and ventilation ratio in critically ill patients
PFr
SFr
OI
VR
-0.326*
-0.325*
0.373*
-
0.759*
-0.939*
-0.773*
*P < 0.01.