Noninvasive oxygenation and ventilation strategies for viral acute respiratory failure: a comprehensive systematic review and meta-analysis

Table 4 NIV against IMV for LOS days in ICU

Model	n studies	I²	R²	Covariant	Estimate
NIMV with imputed data	6	50.77	70	Intercept	− 13.50
				APACHEII	0.12
				Virus	2.81
				Age	0.18
NIMV without imputed data	5	50.98	79.41	Intercept	0.42
NIMV without imputed data	5	50.98	79.41	PaO₂/FiO₂	− 0.004
HFNC with imputed data	4	0	100	Intercept	− 12.81
				SOFA	0.22
				Age	0.19
				PaO₂/FiO₂	− 0.01
HFNC without imputed data	3	3.64	99.52	Intercept	− 5.83
				SOFA	− 0.20
				PaO₂/FiO₂	0.03

ISSN: 2046-4053