Table 4.

Mixed linear regression outcomes for Crs and different PEEP levels and supine vs prone position

	Crs			Cdyn			PIP			PPLAT			ΔP
	Coeff	P values	95% CI	Coeff	P values	95% CI	Coeff	P values	95% CI	Coeff	P values	95% CI	Coeff	P values	95% CI
Position
Prone	− 0.14	< 0.001	− 0.17; − 0.10	− 0.04	< 0.001	− 0.06; − 0.02	1.47	< 0.001	1.11;1.83	1.35	< 0.001	1.05;1.64	1.31	< 0.001	1.01; 1.62
PEEP (cmH2O)
5	0.06	0.001	0.02; 0.10	0.044	< 0.001	0.02; 0.06	3.84	< 0.001	3.42;4.26	4.03	< 0.001	3.68; 4.38	−0.84	< 0.001	− 1.20; − 0.49
10	0.08	< 0.001	0.04; 0.13	0.049	< 0.001	0.02; 0.07	8.38	< 0.001	7.92;8.83	8.42	< 0.001	8.05–8.80	−1.46	< 0.001	− 1.85; − 1.08
Comorb	− 0.03	0.488	− 0.15; 0.07	− 0.07	0.064	− 0.14; 0.02	1.87	0.009	0.46; 3.27	0.63	0.184	− 0.30; 1.58	0.59	0.223	− 0.36; 1.55

Prone position coefficient is referred to supine position; PEEP 5 and 10 are referred to ZEEP. Crs static respiratory system compliance, PEEP positive end-expiratory pressure, PIP peak inspiratory pressure, P_PLAT plateau pressure, ZEEP zero end-expiratory pressure, ΔP driving pressure