Table 4. Attempts of Endotracheal Intubation according to the Head and Neck Positions.

Attempts of endotracheal intubation	Group S (n = 97)	Group R (n = 96)
First	16 (16.5)	22 (22.9)
Second	26 (26.8)	41 (42.7)*
Need for an alternative technique or additional operator	55 (56.7)	33 (34.4)*
Successful endotracheal intubation	42 (42.3)	63 (65.6)*
Failed endotracheal intubation	55 (56.7)	33 (34.4)*

Values are expressed as number of patients (%). Group S: sniffing position, Group R: ramped position. ^*P < 0.05 vs Group S. Successful endotracheal intubation is defined as success at the first or second attempt.