Table 5.

Results of regression of airway type on outcomes in the operating room

	Time to first breath (seconds)		Average tidal volume of first five breaths (mL)		Leak Pressure cm/H20
	Slope coefficient (95% CI)*	p-value	Slope coefficient (95% CI)	p-value	Slope coefficient (95% CI)*	p-value
Airway
i-gel®	−3.3(−21.9 to 15.3)	0.73	59.1(−5.5 to 123.6)	0.07	3.1(−0.6 to 6.9)	0.10
Air-Q®	referent		referent		referent
Age	−0.2(−1.4 to 1.1)	0.77	−0.6(−4.9 to 3.8)	0.80	0.2(−0.1 to 0.5)	0.12
Male gender	7.1(−14.8 to 29)	0.53	−30.3(−108 to 47.3)	0.44	3.9(−1 to 8.7)	0.12
Years of prior EMS experience
None	referent	0.47	referent	0.38	referent	0.85
>0–3 years	−10.9(−37.8 to 15.9)		−2.9(−98.4 to 92.7)		0.9(−5.2 to 7)
3+ years	−18.7(−48.3 to 10.8)		54.4(−50.5 to 159.2)		−0.6(−7.2 to 6)
Number of previous placements of similar airway	2(−0.2 to 4.2)	0.07	2(−5.7 to 9.6)	0.62	−0.5(−1 to 0)	0.04

Mixed effects model to control for repeated measurements within paramedic student and using methods to incorporate data from multiple imputed data.

Bolded italicized values are significant, p<0.05

Findings, as compared to air-Q®, i-gel® showed a trend toward a higher average of the first five breaths with a mean differences of 59.1 mL (95% CI: −5.5 to 123.6; p=0.07). There was also a significant inverse relationship between number of previous placements and leak pressure with a decrease of 0.5 cm/H20 (95% CI: 0.0 to 1.0; p=0.04) (for each additional airway previously placed.