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

Table 2 NIV modalities against IMV for mortality Meta-regressions models

NIV modalities and model	n studies	I²	R²	Covariant	Estimate
NIMV with imputed data and abstract congress	17	92.98	0	Intercept	− 0.52
				Influenza	0.11
				Age	0.006
				PaO₂/FiO₂	− 0.001
NIMV without imputed data and no abstract congress	8	85.56	0	Intercept	11.76
				Influenza	− 3.21
				Age	0.006
				PaO₂/FiO₂	− 0.17
NIMV with imputed data and no abstract congress	15	93.19	17.47	Intercept	− 0.52
				Influenza	0.11
				Age	0.006
				PaO₂/FiO₂	− 0.001
HFNC with imputed data and abstract congress	11	69.61	14.3	intercept	− 2.097
				Age	0.01
				SOFA	0.19
HFNC without imputed data and no abstract congress	5	9.01	69.45	intercept	− 15.04
				APACHEII	1.18
				SOFA	0.77
HFNC with imputed data and no abstract congress	9	36.23	50.02	intercept	− 2.94
				Age	0.02
				SOFA	0.19
CPAP with imputed data and abstract congress	8	0	100	Intercept	0.41
				Age	− 0.01
				PaO₂/FiO₂	− 0.01
CPAP without imputed data and abstract congress	6	42.43	0	Intercept	0.81
CPAP without imputed data and abstract congress	6	42.43	0	Age	− 0.02
CPAP with imputed data and no abstract congress	5	57.90	0	Intercept	0.96
CPAP with imputed data and no abstract congress	5	57.90	0	Age	− 0.02

ISSN: 2046-4053