Skip to main content
# Table 4 Results of meta-analysis for all adverse events between direct laryngoscope and video laryngoscope

Outcomes | Studies, N | Participants, N | Heterogeneity | Heterogeneity Statistical method | Effect Estimate | P values |
---|---|---|---|---|---|---|

Rate of EI | 18 | 11,187 | P = 0.05; I^{2} = 39% | RR (M-H, Fixed, 95% CI) | 0.24 [0.18, 0.32] | P < 0.01 |

Rate of EI (RCT) | 7 | 1232 | P = 0.70; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.27 [0.13, 0.57] | P < 0.01 |

Rate of EI (non-RCT) | 11 | 9955 | P = 0.01; I^{2} = 57% | RR (M-H, Fixed, 95% CI) | 0.24 [0.18, 0.32] | P < 0.01 |

Rate of EI (CPR) | 4 | 3723 | P = 0.44; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.27 [0.15, 0.49] | P < 0.01 |

Rate of EI (non-CPR) | 15 | 7464 | P = 0.03; I^{2} = 46% | RR (M-H, Fixed, 95% CI) | 0.23 [0.17, 0.31] | P < 0.01 |

Rate of EI (experienced) | 5 | 1100 | P = 0.45; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.44 [0.17, 1.15] | P = 0.09 |

Rate of EI (inexperienced) | 12 | 9807 | P = 0.02; I^{2} = 50% | RR (M-H, Fixed, 95% CI) | 0.23 [0.17, 0.31] | P < 0.01 |

Rate of EI (unknown expertise) | 1 | 280 | Not applicable | RR (M-H, Fixed, 95% CI) | 0.38 [0.02, 6.94] | P = 0.51 |

Incidence of hypoxemia | 4 | 1548 | P = 0.35; I^{2} = 8% | RR (M-H, Fixed, 95% CI) | 0.85 [0.69, 1.05] | P = 0.14 |

Incidence of hypoxemia (RCT) | 2 | 510 | P = 0.34; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.91 [0.56, 1.47] | P = 0.70 |

Incidence of hypoxemia (non-RCT) | 2 | 1038 | P = 0.13; I^{2} = 56% | RR (M-H, Fixed, 95% CI) | 0.83 [0.66, 1.05] | P = 0.13 |

Incidence of hypoxemia (experienced) | 2 | 393 | P = 0.70; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 1.05 [0.77, 1.43] | P = 0.76 |

Incidence of hypoxemia (inexperienced) | 2 | 1155 | P = 0.89; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.71 [0.53, 0.96] | P = 0.03 |

Incidence of severe hypoxemia | 8 | 1739 | P = 0.26; I^{2} = 22% | RR (M-H, Fixed, 95% CI) | 1.13 [0.83, 1.52] | P = 0.44 |

Incidence of severe hypoxemia (RCT) | 4 | 787 | P = 0.18; I^{2} = 39% | RR (M-H, Fixed, 95% CI) | 1.11 [0.66, 1.87] | P = 0.39 |

Incidence of severe hypoxemia (non-RCT) | 4 | 952 | P = 0.26; I^{2} = 26% | RR (M-H, Fixed, 95% CI) | 1.13 [0.78, 1.64] | P = 0.52 |

Incidence of severe hypoxemia (experienced) | 2 | 393 | P = 0.46; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 1.16 [0.62, 2.16] | P = 0.65 |

Incidence of severe hypoxemia (inexperienced) | 6 | 1346 | P = 0.14; I^{2} = 40% | RR (M-H, Fixed, 95% CI) | 1.12 [0.79, 1.58] | P = 0.53 |

Incidence of aspiration | 13 | 4634 | P = 0.98; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.83 [0.60, 1.16] | P = 0.28 |

Incidence of aspiration (RCT) | 7 | 1751 | P = 0.79; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.90 [0.52, 1.58] | P = 0.72 |

Incidence of aspiration (non-RCT) | 6 | 2883 | P = 0.92; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.80 [0.53, 1.21] | P = 0.28 |

Incidence of aspiration (CPR) | 1 | 140 | Not applicable | RR (M-H, Fixed, 95% CI) | 5.58 [0.25, 126.46] | P = 0.28 |

Incidence of aspiration (non-CPR) | 13 | 4494 | P = 0.97; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.83 [0.59, 1.16] | P = 0.27 |

Incidence of aspiration (experienced) | 6 | 1769 | P = 0.88; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.65 [0.32, 1.32] | P = 0.24 |

Incidence of aspiration (inexperienced) | 7 | 2865 | P = 0.92; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 0.90 [0.61, 1.31] | P = 0.57 |

Incidence of new-onset CA | 7 | 2433 | P = 0.20; I^{2} = 31% | RR (M-H, Fixed, 95% CI) | 1.52 [0.63, 3.66] | P = 0.35 |

Incidence of new-onset CA (RCT) | 4 | 795 | P = 0.56; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 3.51 [0.73, 16.92] | P = 0.12 |

Incidence of new-onset CA (non-RCT) | 3 | 1638 | P = 0.09; I^{2} = 58% | RR (M-H, Fixed, 95% CI) | 0.86 [0.27, 2.70] | P = 0.79 |

Incidence of new-onset CA (experienced) | 1 | 163 | Not applicable | RR (M-H, Fixed, 95% CI) | 3.04 [0.13, 73.46] | P = 0.49 |

Incidence of new-onset CA (inexperienced) | 6 | 2270 | P = 0.14; I^{2} = 43% | RR (M-H, Fixed, 95% CI) | 1.42 [0.57, 3.56] | P = 0.45 |

24 h-mortality | 6 | 1477 | P = 0.82; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 1.29 [0.98, 1.69] | P = 0.07 |

24 h-mortality (RCT) | 3 | 646 | P = 1.00; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 3.06 [0.49, 19.25] | P = 0.23 |

24 h-mortality (non-RCT) | 3 | 831 | Not applicable | RR (M-H, Fixed, 95% CI) | 1.23 [0.94, 1.62] | P = 0.13 |

24 h-mortality (CPR) | 1 | 229 | Not applicable | RR (M-H, Fixed, 95% CI) | 1.23 [0.94, 1.62] | P = 0.13 |

24 h-mortality (non-CPR) | 5 | 1248 | P = 1.00; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 3.06 [0.49, 19.25] | P = 0.23 |

24 h-mortality (experienced) | 1 | 164 | Not applicable | RR (M-H, Fixed, 95% CI) | 3.07 [0.13, 74.35] | P = 0.49 |

24 h-mortality (inexperienced) | 5 | 1313 | P = 0.73; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 1.27 [0.97, 1.67] | P = 0.08 |

28 d-mortality | 7 | 1821 | P = 0.98; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 1.04 [0.92, 1.19] | P = 0.52 |

28 d-mortality (RCT) | 5 | 1382 | P = 0.90; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 1.04 [0.86, 1.26] | P = 0.66 |

28 d-mortality (non-RCT) | 2 | 439 | P = 0.82; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 1.04 [0.88, 1.23] | P = 0.62 |

28 d-mortality (CPR) | 1 | 229 | Not applicable | RR (M-H, Fixed, 95% CI) | 1.03 [0.86, 1.23] | P = 0.76 |

28 d-mortality (non-CPR) | 6 | 1592 | P = 0.95; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 1.05 [0.89, 1.24] | P = 0.57 |

28 d-mortality (experienced) | 2 | 821 | P = 0.94; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 1.22 [0.83, 1.79] | P = 0.32 |

28 d-mortality (inexperienced) | 5 | 1000 | P = 0.99; I^{2} = 0% | RR (M-H, Fixed, 95% CI) | 1.01 [0.88, 1.16] | P = 0.88 |