Table 2.

Airway intervention

	Group P (N = 356)	Group PM (N = 541)	P value
Overall airway interventions	25 (7.0)	15 (2.8)	0.005
Oral/nasal airway	14 (3.9)	10 (1.8)	0.058*
LMA	11 (3.1)	4 (0.7)	0.007*
Intubation	0 (0.0)	1 (0.2)	0.417*

Data are number (%). LMA, Laryngeal mask airway

*The Bonferroni-adjusted p value is set at 0.0083