Table 4.

Comparisons of times needed to perform tracheal intubations and of difficulty scores for four different laryngoscopes

	Overall	Pentax-Airway Scope	King VISION	McGrath Mac	Macintosh	P
Time to perform intubations, s	60±31 (n=269)	63±34 (n=78)	63±31 (n=45)	62±31 (n=79)	52±27 (n=67)	0.043
Difficulty score†	39±27 (n=258)	39±26 (n=72)	43±26 (n=45)	32±27* (n=78)	45±26 (n=63)	0.009

Values are means ±SD deviations.

post hoc analyses were performed using Tukey-Kramer test for paired comparisons of four laryngoscopes.

*p=0.027 vs Macintosh.

†Difficulty was scored by visual analogue scale, from very easy (0) to very difficult (100).