Table 1.

Participant Characteristics by Group

	Full sample (n = 43,777)				Propensity score-matched sample (n = 3700)
	With ASD n = 925	Without ASD n = 42,852	Difference (95% CI)	p-value	With ASD n = 925	Without ASD n = 2775	Difference (95% CI)	p-value
Obese weight status (%)	23.1	14.1	9.0 (3.6 to 14.4)	<0.001	23.1	15.6	7.5 (1.4 to 13.6)	0.01
Age, mean (standard error)	13.3 (0.17)	13.7 (0.03)	−0.4 (−0.7 to −0.02)	0.04	13.3 (0.17)	13.4 (0.11)	−0.1 (−0.5 to 0.3)	0.76
Male sex (%)	83.7	50.5	33.2 (28.7 to 37.8)	<0.001	83.7	80.5	3.2 (−2.3 to 8.8)	0.27
Racial/ethnic group (%)
White, non-Hispanic	63.2	55.5	7.7 (0.0 to 15.5)	0.07	63.2	68.6	−5.4 (−14.0 to 3.3)	0.22
Black, non-Hispanic	9.2	14.3	−5.1 (−9.3 to −1.0)		9.2	7.7	1.5 (−3.2 to 6.1)
Hispanic	20.1	18.7	1.4 (−6.6 to 9.4)		20.1	14.1	6.0 (−2.5 to 14.6)
Multiracial/other, non-Hispanic/missing	7.5	11.5	−4.0 (−7.0 to −1.1)		7.5	9.6	−2.1 (−6.1 to 1.8)
Household income (%)
<100% FPL	11.7	18.3	−6.6 (−10.0 to −3.1)	0.01	11.7	20.3	−8.6 (−13.5 to −3.7)	0.01
100%–199% FPL	19.7	21.0	−1.3 (−6.5 to 3.9)		19.7	22.2	−2.5 (−8.8 to 3.8)
200%–399% FPL	37.7	29.4	8.3 (0.8 to 15.8)		37.7	33.1	4.6 (−3.7 to 12.9)
400% or more FPL	30.9	31.3	−0.4 (−6.8 to 5.9)		30.9	24.4	6.5 (−0.7 to 13.6)
Racial/ethnic group (%)
White, non-Hispanic	63.2	55.5	7.7 (0.0 to 15.5)	0.06	63.2	68.6	−5.4 (−14.2 to 3.4)	0.22
Nonwhite/Hispanic	36.8	44.5	−7.7 (−15.5 to 0.0)		36.8	31.4	5.4 (−3.4 to 14.2)
Household income (%)
<200% FPL	31.4	39.2	−7.8 (−13.9 to −1.8)	0.01	31.4	42.5	−11.1 (−18.3 to −3.8)	0.003
200% or more FPL	68.6	60.8	7.8 (1.8 to 13.9)		68.6	57.5	11.1 (3.8 to 18.3)

ASD, autism spectrum disorder; CI, confidence interval; FPL, federal poverty level.