TABLE 2.

Univariate associations between exposure and outcomes among all patients and those with asthma, gastroenteritis, and fever and neutropenia with malignancy.

	Unexposed	Exposed	p
All patients
N (%)	161,682 (95)	8,430 (5)
Received any medication (%)	80,186 (50)	4,131 (49)	.29
Time to first medication (min)	90 (54,146)	98 (58,157)	<.001
ED length of stay (min)	188 (116,284)	195 (124,286)	<.001
Hospital length of stay (days)	2.0 (1.1,3.7)	2.0 (1.1,3.8)	.74
Admitted (%)*	30,146 (19)	1,514 (18)	.07
Revisit within 72 hours (%)	5,081 (4)	272 (4)	.77
Asthma
N (%)	4,965 (95)	271 (5)
Received corticosteroid (%)	3,472 (70)	195 (72)	.48
Time to corticosteroid (min)	69 (48,105)	75 (50,119)	.11
ED length of stay (min)	238 (167,312)	245 (186,297)	.61
Hospital length of stay (days)	1.6 (1.1,2.2)	1.7 (1.1,2.1)	.76
Admitted (%)*	1,432 (29)	64 (24)	.05
Revisit within 72 hours (%)	175 (5)	13 (6)	.40
Gastroenteritis
N (%)	6,475 (96)	298 (4)
Received ondansetron (%)	3,523 (54)	162 (54)	.99
Time to ondansetron (min)	79 (53,117)	86 (57,132)	.33
ED length of stay (min)	205 (137,299)	219 (143,313)	.05
Hospital length of stay (days)	2.1 (1.2,3.9)	2.3 (1.2,6.1)	.31
Admitted (%)*	979 (15)	51 (17)	.39
Revisit within 72 hours (%)	291 (5)	18 (7)	.18
Fever and neutropenia
N (%)	201 (94)	13 (6)
Received antibiotic (%)**	191 (95)	13 (100)	1
Time to antibiotic (min)	54 (42,67)	50 (38,56)	.13
ED length of stay (min)	216 (172,260)	224 (178,238)	.94
Hospital length of stay (days)	3.8 (2.6,5.9)	2.7 (2.0,3.2)	.04
Admitted (%)*,**	197 (99)	13 (100)	1
Revisit within 72 hours (%)	0 (0)	***

^*Disposition unknown in some patients

^**Fisher exact test used due to low expected cell counts

^***No patients discharged in the exposed group from which to calculate a revisit rate