Table 3.

The DP and PaO₂/FiO₂ pre- and post-PPV session in both survivors and non-survivors

Variables (n = 22)	Survivors
	Values	p-value
DP pre-PPV (cmH2O), Mean ± SD	16.36 ± 2.57	<0.001*
DP post-PPV (cmH2O), Mean ± SD	13.91 ± 1.74
PaO2/FiO2 pre-PPV, Median (IQR)	92.75 (67.5–117.75)	<0.001**
PaO2/FiO2 post-PPV session, Median (IQR)	205.50 (116.25–244.50)

Variables (n = 30)	Non-survivors
	Values	p-value
DP pre-PPV (cmH2O), Mean ± SD	19.43 ± 3.16	0.318*
DP post-PPV (cmH2O), Mean ± SD	19.70 ± 3.15
PaO2/FiO2 pre-PPV, Median (IQR)	87.90 (67.75–100.75)	<0.001**
PaO2/FiO2 post-PPV, Median (IQR)	112 (88.0–146.50)

*Paired T-test; **Wilcoxon Signed Ranks test; DP, driving pressure; IQR, interquartile range; PaO₂/FiO₂ ratio, ratio of partial pressure of arterial oxygen to fraction of inspired oxygen; PPV, prone position ventilation; SD, Standard deviation