Table 5.
Adjusted odds ratios for individual difficult airway predictors.
| FPS-AE | Odds ratio | 95% CI | p-value |
|---|---|---|---|
| Training Year | |||
| PGY1 | [Reference] | ||
| PGY2 | 1.27 | 0.86 – 1.87 | 0.228 |
| PGY ≥ 3 | 1.45 | 0.98 – 2.14 | 0.062 |
| Trauma | 0.86 | 0.54 – 1.38 | 0.536 |
| Age | 1.00 | 0.99 – 1.01 | 0.719 |
| Device | |||
| DL | [Reference] | ||
| SG VL | 1.91 | 1.09 – 3.13 | 0.023 |
| HA VL | 1.77 | 1.00 – 3.12 | 0.050 |
| DAC | |||
| None | [Reference] | ||
| Blood in the airway | 0.52 | 0.35 – 0.78 | 0.001 |
| Vomit in the airway | 0.84 | 0.55 – 1.29 | 0.436 |
| Short neck | 1.23 | 0.79 – 1.92 | 0.349 |
| Cervical immobility | 1.05 | 0.68 – 1.63 | 0.824 |
| Small mandible | 0.56 | 0.35 – 0.89 | 0.014 |
| Obesity | 0.82 | 0.59 – 1.12 | 0.238 |
| Airway edema | 0.70 | 0.35 – 1.39 | 0.308 |
| Facial/neck trauma | 0.94 | 0.58 – 1.52 | 0.812 |
| Large tongue | 0.44 | 0.29 – 0.65 | <0.001 |
| Restricted mouth opening | 0.32 | 0.21 – 0.50 | <0.001 |
| Hypoxemia | 0.35 | 0.26 – 0.48 | <0.001 |
| Hypotension | 1.26 | 0.90 – 1.78 | 0.173 |
| Metabolic acidosis | 0.96 | 0.63 – 1.44 | 0.834 |
| RV failure | 0.36 | 0.10 – 1.35 | 0.130 |
FPS-AE, first-pass success without adverse events; CI, confidence interval; PGY, postgraduate year; DL, direct laryngoscopy; SG VL, standard geometry video laryngoscope; HA VL, hyperangulated video laryngoscope; DAC, difficult airway characteristic; RV, right ventricular.