Table 2.

Differences in serious complications and duration of intubation by the attempt type.

N = 1,550*	1 Laryngoscope+1 ETT Insertion (n = 1,461)		1 Laryngoscope+Multiple ETT Insertions (n = 89)		% Diff	(95% CI)
	n	(%; 95% CI)	n	(%; 95% CI)
Complication
Any complication	338	(23.1; 20.9–25.4)	24	(26.9; 17.9–37.4)	−3.8	(−13.8 to 5.7)
Severe hypoxemia	132	(9.0; 7.7–10.7)	10	(11.0; 5.5–19.0)	−2.1	(−9.8 to 4.3)
Hypotension	223	(15.4; 13.3–17.3)	16	(18.2; 10.3–26.7)	−2.8	(−11.6 to 5.4)
Cardiac arrest	15	(1.0; 0.5–1.5)	1	(1.3; 0.9–4.3)	−0.4	(−3.4 to 0.3)
Death	8	(1.4; 0.4–2.4)	0	—
Duration of intubation†‡	120	(90–158)	155	(120–190)	−35.0	(−8.9 to −61.1)

CI, Confidence interval; Diff, difference; ETT, endotracheal tube.

^*Analysis excluded patients who required >1 laryngoscope insertion (n=260) and (n=53) who met the definition of a serious complication before induction or had missing data on preinduction cardiac arrest, systolic blood pressure, and oxygen saturation.

^†Median seconds (interquartile range).

^‡Analysis excluded 27 patients whose duration of intubation was missing and 5 patients whose duration of intubation was ≥1,000 seconds