Table 4.

Comparison of mean total and domain ADI-R, ADOS and ADOS-2 scores by ADI-R classification (n=149)

	ADI-R				p
	Autism (n=141)		No Autism (n=8)
	M	SD	M	SD
ADI-R Domains
Social Impairment	18.55	5.16	7.25	1.67	<0.01
Communication (Verbal)	5.96	7.62	5.25	4.33	0.79
Communication (Non-Verbal)	7.34	6.31	1.88	3.48	0.02
Restrictive/Repetitive/Stereotyped Behavior	3.29	1.62	1.13	0.64	<0.01
Abnormality Evident ≤ 36 months	4.32	0.88	4.00	0.92	0.32
ADIR Total	39.46	7.60	19.50	3.38	<0.01
ADOS Domains
Communication	5.69	1.66	4.25	1.04	0.02
Social Interaction (SI)	9.58	2.30	7.50	2.51	0.02
Communication + SI Total	15.26	3.17	11.75	3.28	<0.01
Play	2.60	1.17	1.88	0.99	0.09
Stereotyped Behaviors/Restricted Interests	2.74	1.48	1.63	0.92	0.03
ADOS-2Domain
Social Affect (SA)	14.21	3.22	11.63	3.62	0.03
Restricted/Repetitive Behavior	3.51	1.79	1.75	1.04	<0.01
SA + RB Total	17.72	4.36	13.38	4.37	<0.01