Response to prone positioning in COVID-19 patients with acute respiratory distress syndrome: a retrospective observational study

The Egyptian Journal of Bronchology

Table 2 Oxygenation and carbon dioxide response to prone positioning

Particulars — paired defenses		PaO2 — P	PaO2 — S	PaCO2 — P	PaCO2 — S	PF — S	PF — P
Survived (52)
Mean		61.5 ± 7.8	54.3 ± 7.0	43.5 ± 6.0	42.1 ± 8.6	128.9 ± 33.3	149.10 ± 36.3
Mean difference		8.12 ± 5.63		1.39 ± 4.94		20.21 ± 13.75
95% CI	Lower	6.55		0.009		16.38
95% CI	Upper	9.68		2.76		5.22
Sig		< 0.001*		0.49		< 0.001*
Not survived (23)
Mean		60.2 ± 4.3	50.4 ± 5.2	47.7 ± 12.0	45.0 ± 9.6	100.97 ± 31.3	112.7 ± 37.7
Mean difference		4.17 ± 7.74		2.70 ± 8.94		11.78 ± 10.82
95% CI	Lower	0.828		− 1.171		7.095
95% CI	Upper	7.520		6.562		16.455
Sig		0.017*		0.162		< 0.001*
Total (75)
Mean		60.4 ± 8.2	53.5 ± 6.8	44.8 ± 8.5	43.0 ± 8.9	138.0 ± 40.2	120.3 ± 35.0
Mean difference		6.9 ± 6.6		1.8 ± 6.4		17.6 ± 13.4
95% CI	Lower	5.4		0.3		14.5
95% CI	Upper	8.4		3.3		20.7
Sig		< 0.001*		0.018*		< 0.001*

Data are presented as mean ± SD
CI Confidence interval, PaO2 Partial pressure of oxygen, PaCO2 Partial pressure of CO2, PF PaO2/FIO2, P Prone, S Supine
*Significant