Research Article
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 |
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