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| Cormack and Lehane classification | Group S (n = 97) | Group R (n = 96) |
|---|---|---|
| 1 | 11 (11.3) | 20 (20.8) |
| 2 | 27 (27.8) | 34 (35.4) |
| 3 | 37 (38.1) | 31 (32.3) |
| 4 | 22 (22.7) | 11 (11.5) |
| ≤2 | 38 (39.2) | 54 (56.2)* |
| ≥3 | 59 (60.8) | 42 (43.8)* |
Values are expressed as number of patients (%). Group S: sniffing position, Group R: ramped position. *P < 0.05 vs Group S. At the score of ≥ 3, intubation is likely to be difficult.
