Table 2.

Perioperative respiratory adverse events.

Child	Age at Surgery (years)	Medical Comorbidities	MOS	PRAE
1	2.7	Chiari malformation type 1, prematurity	2	Hypoxemia requiring supplemental oxygen*
2	4.5	None	4	Hypoxemia requiring supplemental oxygen*
3	5.5	None	2	Hypoxemia requiring supplemental oxygen*
4	7.4	Chiari malformation type 1	1	Hypoxemia requiring supplemental oxygen*
5	8.5	Prematurity	4	Hypoxemia requiring supplemental oxygen*
6	6.2	None	2	Hypoxemia requiring supplemental oxygen*
7	3.5	Trisomy 21	3	Hypoxemia requiring supplemental oxygen*
8	4.0	None	4	Hypoxemia requiring supplemental oxygen*
9	5.7	None	1	Hypoxemia requiring supplemental oxygen*
10	1.8	None	2	Upper airway obstruction requiring oral airway†
11	9.7	None	1	Upper airway obstruction requiring oral airway†
				Hypoxemia requiring supplemental oxygen*
12	5.9	Achondroplasia	3	Hypoxemia requiring supplemental oxygen*
13	10.8	Congenital muscular dystrophy	4	Hypoxemia requiring supplemental oxygen*
14	2.3	Prematurity	2	Upper airway obstruction requiring nebulized epinephrine†
				Hypoxemia requiring supplemental oxygen*
15	10.9	None	2	Hypoxemia requiring supplemental oxygen*

*Beyond 1 hour after arrival in postanesthetic care unit. †Beyond 30 minutes post-extubation. MOS = McGill oximetry score, PRAE = perioperative respiratory adverse event.