A Systematic Review and Meta-Analysis of Randomized Controlled Trials on Supine vs. Nonsupine Endotracheal Intubation

Table 3

Population characteristic in supine vs. semierect positions.

Supine vs. semierect positions
Study	Location	Country	Number of patients	Age	Male (%)	BMI
Chang et al. [18]	Single-center	Korea	44	48	47.7	23.52
			44	49	45.4	23.85
Collins et al. [19]	Multicenter	Philadelphia	27	43.3	7.40	46.9
			33	41.9	18.18	49.9
Gupta and Rusin [20]	Multicenter	US	37	—	—	51.6
			39	—	—	46.8
Reddy et al. [21]	Single-center	UK	374	57.4	49.7	28.5
			407	55.8	46.4	28