Table 3.

Autism Spectrum Disorder (ASD)–Related Clinical Characteristics of DSMIV Pervasive Developmental Disorder (PDD)-DSM5 ASD Convergent (C)/Divergent (D) Cases (n=292)

	Convergent Group (N=274)		Divergent Group (N=22)
	C-nASDa (n=86)	C-ASDb (n=188)	D-SCDc (n=17)	D-Otherd (n=5)
Intellectual Deficit***	6 (7%)	58 (32%)	2 (11.8%)	0 (0.0%)
Performance IQ (M±SD)***	99±18b	86±27a	100±17	97±15
ASSQ Parents (M, (min, max))**	20 (2, 46)b	27 (0, 54)a	21 (14, 28)	20 (6, 33)
ADI-R Algorithm Scores (M±SD)
Social Reciprocity***	5.2±4.0b,c	17.8±7.5a,c	12.3±6.5a,b	10.0±7.0
Communication***	6.3±3.7b	13.8±4.9a,c,§	9.2±3.8b	8.0±4.7b
Stereotypies***	2.0±1.5b	4.8±2.5a,c	2.1±2.3b	2.2±0.8
Onset<36monthsd***	30 (35.3%)	154 (84.6%)	4 (76.5%)	1 (40.4%)
ADOS Algorithm Scores (M±SD)
Social Reciprocity***	2.8±2.5b,c,d	8.7±2.8a	7.1±3.0a	6.6±1.5a
Communication***	1.5±1.2b,c	4.1±2.1a	3.0±2.0a	2.8±1.6
Stereotypies***	0.7±0.8b	1.9±1.6a,c	0.7±0.9b	0.2±0.4
Imagination***	0.5±0.6b	1.3±1.0a	0.7±0.8	1.0±0.7

Note: ASSQ= autism spectrum screening questionnaire, ADI-R= autism diagnostic interview-revised, ADOS= autism diagnostic observation schedule, C-ASD= Convergent for ASD (PDD[+]/ASD[+]), C-nASD= Convergent for no ASD (PDD[−]/ASD[−]), D-social communication disorder (SCD) = Divergent for DSMIV PDD and DSM5 ASD (PDD[+]/ASD[−]) with final diagnosis of DSM5 SCD Diagnosis, D-Other= Divergent for DSMIV PDD and DSM5 ASD (PDD[+]/ASD[−]) with final diagnosis of DSM5 Other Psychiatric Disorders.

All other statistical tests were performed with analysis of variance (ANOVA) with Scheffé post-hoc analyses to examine differences in ASD-related clinical characteristics between C-nASD, C-ASD, D-SCD and D-Other groups.

^aSignificant group differences from statistical tests.

^bSignificant group differences from statistical tests.

^cSignificant group differences from statistical tests.

^***p<0.001

^dchi-square test (2df) was used.