[Retracted] A Meta-Analysis on the Effectiveness of Video Laryngoscopy versus Laryngoscopy for Emergency Orotracheal Intubation

Table 1

Characteristics of studies.

Studies	Characteristics
	[7]	[13]	[14]	[15]	[16]	[17]
Country of study	USA	USA	France	USA	France	Israel
Study type	Propensity matched analysis	Randomized clinical trial	Observational	Observational	Randomized clinical trial	Randomized clinical trial
Hospital setting	Intensive care unit	Intensive care unit	Intensive care unit	Intensive care unit	Intensive care unit	Intensive care unit
Intubation type	Emergency intubations	Emergency intubations	Emergency intubations	Emergency intubations	Emergency intubations	Emergency intubations
Video laryngoscopy type	Multiple	McGRATH/GlideScope/Olympus	McGRATHMAC	GlideScope	McGRATHMAC	GlideScope
Medical experts	6 doctors (postgraduate)	Pulmonary experts and critical care supervised by physicians	ICU physicians and anesthetists	Pulmonary critical care experts and intensive care unit	ICU physicians	Pulmonary and critical care experts
Age, yrs (VL)	59 (49–69)	59 (49–68)	63 (55–70)	66 ± 16.96	62.7 (15.3)	65.4
Age, yrs (DL)	60 (53–73)	60 (51–67)	59 (49–69)	69 ± 16.88	62.8 (16.3)	69.6
Total number	809	150	210	392	371	153