Table 1 Time (s) for intubation and number of teeth clicks [times].

	Anaesthetists		Residents		Nurses		Students
	AWS	DL	AWS	DL	AWS	DL	AWS	DL
SP	9.8 (3.8) [0]	11.1 (3.0) [2]	9.5 (2.8) [0]	10.9 (3.8) [0]	15.4 (11.0) [7]	9.6 (3.0) [15]	21.3 (16.1) [0]	15.5 (3.6) [2]
SC	8.3 (2.8) [0]	11.2 (5.2) [2]	8.3 (3.8) [0]	11.2 (3.8) [2]	9.3 (2.7) [3]	12.4 (4.3) [22]	9.6 (3.2)* [0]	13.3 (4.1) [1]
RL	10.6 (2.1)* [0]	13.8 (4.2) [0]	21.2 (13.3) [2]	14.9 (4.3) [2]	24.9 (18.5) [3]	23.6 (21.2) [7]	30.8 (26.5) [4]	19.6 (9.0) [3]
LL	11.7 (5.3) [0]	15.0 (7.8) [0]	20.3 (12.2) [2]	17.8 (14.9) [0]	20.3 (14.8) [3]	19.1 (10.3) [0]	25.6 (15.7) [0]	41.9 (24.9) [2]

AWS, Airway Scope; DL, direct laryngoscope; LL, left lateral position; RL, right lateral position; SC, straight cervical position without pillow; SP, sniffing position.

Data are represented as mean (SD). Numbers in square brackets denote overall number of teeth clicks.

*p<0.05 vs DL.