Table 1:

Demographic Characteristics of Children Included in NHANES 2005–2010 Analyses

	Developmental Disorders (n = 799)	Controls (n=9,386)	p value
Age (years)*	10.2 ± 0.20	9.63 ± 0.09	0.015
Male (%)	67.0	49.5	<0.001
Race/ethnicity (%)			<0.001
Caucasian	59.7	58.1
Black	18.7	14.0
Hispanic	13.9	20.5
Other	7.7	7.4
Household smokers	24.0	14.8	<0.001
Household income (%)			<0.001
< 1.75 × PL	45.9	36.0
≥ 1.75 × PL	54.1	64.1
Household insurance			<0.0010
None	7.1	10.6
Private	43.4	58.2
Government	45.4	29.3
Other	4.1	1.8
College education	53.3	56.2	0.203
Annual healthcare visits			<0.001
0–1	26.7	35.6
≥2	73.3	64.4
Low birth weight (%)	18.1	10.8	<0.001

^*Mean +/− SE