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Glottic view grade
| Type of scenario | Cormack and Lehane grade | Macintosh laryngoscope | McGrath laryngoscope | p value |
|---|---|---|---|---|
| Scenario A | I | 65 (87%) | 73 (97%) | NS |
| II | 10 (13%) | 2 (3%) | ||
| III | – | – | ||
| IV | – | – | ||
| Scenario B | I | 14 (19%) | 47 (63%) | <0.001 |
| II | 36 (48%) | 28 (37%) | ||
| III | 25 (33%) | – | ||
| IV | – | – | ||
| Scenario C | I | 5 (7%) | 32 (43%) | <0.001 |
| II | 27 (36%) | 43 (57%) | ||
| III | 42 (56%) | – | ||
| IV | 1 (1%) | – |
NS not statistically significant
