TABLE 1.

Comparison of Demographics and Baseline Clinical Characteristics Between Groups

Variable	Exposed to Benzalkonium	Control	P
Oxygen saturation after initial presentation, %, mean (SD)	94 (4)	94 (4)	.67
First asthma score documented after arrival, mean (SD)	7 (2)	7 (2)	.20
Age, y, mean (SD)	5.8 (4.0)	5.9 (3.8)	.68
Sex, n (%)			.26
Male	130 (55)	145 (60)
Female	106 (45)	96 (40)
Race, n (%)			.36
African American	115 (53)	135 (60)
White	82 (38)	71 (32)
Hispanic	12 (6)	14 (6)
Asian American	7 (3)	4 (2)