TABLE 1.

Demographics

Demographic variable	Group		P value
	Emergent (n=47)	Elective (n=147)
Age at enrollment (y)			0.6
<5	0	0
5–17	1 (2)	5 (3)
18–39	17 (36)	63 (43)
40–69	28 (60)	72 (49)
>69	1 (2)	7 (5)
Caucasian race	44 (94)	138 (94)	0.9
Hispanic ethnicity	3 (6)	8 (5)	0.7
Male gender	30 (64)	98 (67)	0.7
Height (cm)	183.4 ± 11.8 (n=45)	185.8 ± 12.2 (n=141)	0.3
Weight (kg)	83.0 ± 23.5 (n=45)	87.1 ± 23.6 (n=141)	0.3
Body surface area (m2)	2.04 ± 0.31 (n=45)	2.11 ± 0.32 (n=138)	0.2
History of tobacco use (>100 cigarettes in lifetime)	23 (59) (n=39)	34 (32) (n=107)	0.003
Age at first operation (y)	38.0 ± 11.1 (n=41)	34.9 ± 14.2 (n=130)	0.2

Continuous data are presented as mean ± SD, and categorical data are presented as number (%).