. Author manuscript; available in PMC: 2018 Jun 15.

Published in final edited form as: Am J Psychiatry. 2012 Oct;169(10):1056–1064. doi: 10.1176/appi.ajp.2012.12020276

Table 1.

Sample Demographics

	UMACC All N=1465	ASD	UMACC Non-ASD N=527		CPEA All N=858	ASD	CPEA Non-ASD N=163		SSC All N=2130	ASD
	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Age	6.6^a,^c	3.5	7.3	3.7	6.4^c,^f	3.6	5.8	3.4	9.4^a,^f	3.5
Verbal IQ	66.2^a	33.9	84.2^b	26.7	68.4^f	29	74.4^b	26.2	77.7^a,^f	31.4
Nonverbal IQ	77^a,^b	28.8	86^d	26.2	83.3^b	26.6	80.3^d	24.1	84.8^a	26.1

Male: Female Ratio	3.8:1^a		2.0:1^b		5.3:1^f		2.1:1^b		6.7:1^a,^f

Gender	N	%	N	%	N	%	N	%	N	%
Male	1162	79.3	353	67.1	639	84.1	110	67.5	1854	87
Female	303	20.7	173	32.9	121	15.9	53	32.5	275	12.9
Race
Caucasian	621	80.4	316	73.8	721	86.6	144	88.3	1687	79.2
African American	59	7.6	57	13.3	23	2.8	4	2.5	76	3.6
Asian	20	2.6	7	1.6	15	1.8	1	0.6	79	3.7
Biracial or Multi-racial	47	6.1	29	6.8	63	7.6	12	7.4	169	7.9
Other	20	2.6	15	3.5	11	1.3	2	1.2	97	4.6
Clinical Diagnosis
Autistic Disorder	975	66.6		-	780	90.9		-	1466	68.8
PDD-NOS	465	31.7		-	78	9.1		-	428	20.1
Asperger Syndrome	25	1.7		-		-		-	236	11.1

Comparisons between All ASD samples (UMACC, CPEA, & SSC) and comparisons between Non-ASD samples (UMACC & CPEA). Comparisons were not completed for race and clinical diagnosis.

UMACC and SSC samples are significantly different from one another, p <.001

UMACC and CPEA samples are significantly different from one another, p < .001

UMACC and CPEA samples are significantly different from one another, p < .01

UMACC and CPEA samples are significantly different from one another, p < .05

SSC and CPEA samples are significantly different from one another, p < .001

SSC and CPEA samples are significantly different from one another, p < .05