Table 4.

Predictors of Log-Transformed Emergency Department Wait Times for Children under 16

	Adjusted Difference (%)	95% Confidence Interval	p-Value
Race/ethnicity
Non-Hispanic white	Referent	—	—
Non-Hispanic black	14.2	3.3, 26.4	.010
Hispanic	26.1	15.1, 38.3	<.001
Other	−3.4	−18.0, 13.9	.68
Gender
Male	Referent	—	—
Female	−0.6	−4.9, 4.0	.80
Age
<3	Referent	—	—
3–5	−2.5	−10.3, 5.9	.54
6–10	−10.4	−16.7, −3.5	.004
11–15	−1.7	−8.4, 5.5	.63
Payment source
Private insurance	Referent	—	—
Medicaid/SCHIP	3.9	−2.8, 11.1	.26
Other/unknown	−7.0	−19.5, 7.4	.32
Uninsured	−0.8	−9.9, 9.3	.88
Geographic region
Northeast	Referent	—	—
Midwest	−14.0	−27.1, 1.4	.07
South	1.6	−14.2, 20.2	.86
West	−4.3	−19.2, 13.3	.61
Metropolitan status
Non-MSA	Referent	—	—
MSA	48.2	17.2, 87.4	.001
Hospital ownership
Nonprofit organization	Referent	—	—
Government	−6.6	−23.4, 13.9	.50
Proprietary	−1.6	−15.4, 14.4	.83
Pediatric share of ED visits
<25%	Referent	—	—
25–<75%	8.0	−3.8, 21.3	.20
≥75%	45.6	21.7, 74.2	<.001
Triage status
Immediate	Referent	—	—
1–14 minutes	57.3	25.7, 96.7	<.001
15–60 minutes	184.8	123.9, 262.3	<.001
>1–2 hours	266.5	184.7, 371.9	<.001
>2–24 hours	286.5	195.9, 404.8	<.001
Unknown/no triage	138.3	81.5, 213.0	<.001

Notes. The regression model also controlled for day of week, time of day, year and month of ED visit. The model R² was 0.14.

Data from NHAMCS 2005–2006 weighted to be nationally representative.

ED, emergency department.