TABLE 4.

Characteristics of the ASD Cases

Case No.	21-y Assessment				Gender	16-y Assessment
	ADI-R	ADOS	Age, moa			FSIQ	VABSC	Riley Scoreb	Other DSM-IV Diagnosesc
			First Word	First Phrase
Screen-negatives
1	No diagnosis	ASD	<24	<33	Male	118	92	0	None
2	No diagnosis	ASD	21	21	Male	115	85	8	ODD
3	No diagnosis	ASD	17	19	Male	127	95	2	None
Screen-positives
4	ASD	No dx	<24	Unknown	Female	112	65	11	None
5	No diagnosis	Autism	18	24	Female	99	81	12	Motor-vocal tics
6	ASD	Autism	30	45	Male	97	64	9	Tourette's syndrome
7	ASD	Not testedd	36	60	Male	77	45	7	Transient tic disorder; specific phobia
8	ASD	Not testedd	≥24	36	Male	76	56	7	ADHD; ODD; CD; social phobia
9	ASD	ASD	15	36	Female	72	64	7	ADHD
10	No diagnosis	ASD	36	48	Male	68	74	6	none
11	ASD	Not testedd,e	60	60	Male	Not testedd,e	39	—d,e	Not assessedd,e
12	ASD	Not testede	36	36	Male	Not testede	32	—e	Not assessede
13	ASD	Not testedd	18	30	Male	Not testede	54	—d	Not assessedd
14	ASD	Not testedd	36	45	Male	Not testede	50	—d	Not assessedd

FSIQ indicates full-scale IQ (from the WASI); VABSC, Vineland Adaptive Behavior Scale Composite⁵¹; DSM-IV, Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition; ODD, oppositional/defiant disorder; ADHD, attention deficit hyperactivity disorder; CD, conduct disorder.

^aBased on ADIR scoring for items 9 (first word) and 10 (first phrase) where “normal” is <24 and <33 months, respectively.

^bScores ≥5 are in the top 10% of the Riley Motor Problems⁵² distribution; they indicate some motor impairment.

^cAscertained at age 16 years with the Diagnostic Interview Schedule for Children/Parent Version–IV, using the threshold algorithm,³⁰

^dAssessed by telephone; no in-person assessments at this age.

^eSevere motor impairment; nonambulatory.