Table 1.

PaO2/FiO2 ratio levels curve of different measurements between survivors and non-survivors

	Survivors (n = 2569; 95.1%)	Non-survivors (n = 132; 4.9%)	P
PaO2/FIO2 ratio on admission	334 ± 95	303 ± 103	0.001
PaO2/FIO2 ratio at 3 h	329 ± 90	288 ± 104	<0.001
PaO2/FIO2 ratio at 6 h	326 ± 89	280 ± 104	<0.001
PaO2/FIO2 ratio at 12 h	319 ± 94	273 ± 96	0.008
PaO2/FIO2 ratio at 24 h	316 ± 73	246 ± 86	<0.001

PaO2/FiO2 ratio: Arterial partial pressure of O2 and fraction of inspired oxygen ratio.