First-attempt success and intubation failure rates in unmatched and propensity score-matched groups by the first intubators’ grade
| First intubators’ grade | GVL | MAC | GVL vs MAC (reference) | ||
|---|---|---|---|---|---|
| RR (95% CI) | p Value | ||||
| All patients (n=4041) | |||||
| First-attempt success rate, n (%) | Junior (n=3071) | 297 (84.6) | 2177 (80.0) | 1.30 (1.00 to 1.68) | 0.047 |
| Senior/attending (n=970) | 166 (87.8) | 703 (90.0) | 0.82 (0.53 to 1.27) | 0.376 | |
| Intubation failure rate, n (%) | Junior (n=3071) | 33 (9.4) | 301 (11.1) | 0.98 (0.95 to 1.02) | 0.316 |
| Senior/attending (n=970) | 12 (6.4) | 49 (6.3) | 1.00 (0.96 to 1.04) | 0.970 | |
| Propensity score-matched patients (n=1089) | |||||
| First-attempt success rate, n (%) | Junior (n=824) | 227 (84.4) | 482 (86.9) | 0.84 (0.59 to 1.20) | 0.338 |
| Senior/attending (n=265) | 80 (85.1) | 159 (93.0) | 0.47 (0.23 to 0.98) | 0.043 | |
| Intubation failure rate, n (%) | Junior (n=824) | 26 (9.7) | 40 (7.2) | 1.03 (0.98 to 1.08) | 0.247 |
| Senior/attending (n=265) | 6 (6.4) | 7 (4.1) | 1.03 (0.96 to 1.09) | 0.439 | |
GVL, GlideScope video laryngoscope; MAC, Macintosh laryngoscope; RR, risk ratio.