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Comparison of the primary outcome (N = 260)
| Comparison | RR | P | |
|---|---|---|---|
| Estimate | 95% CI | ||
| Bougie first vs. Preloaded bougie | 8.00 | 1.03 to 62.16 | 0.047* |
| Bougie first vs. ETT with stylet | 9.00 | 1.17 to 69.02 | 0.035* |
| Bougie first vs. ETT without stylet | 19.00 | 2.62 to 137.79 | 0.004* |
Abbreviations: vs., versus; RR, risk ratio; CI, confidence interval; ETT, endotracheal tube; *P < 0.05. The primary outcome was analyzed by the generalized estimating equation logistic model
