Table 1.

Distribution of DSM-IV and Gillberg and Gillberg (G&G) criteria across the diagnostic categories

Type of DSM-IV PDD	Autistic disorder (N=5)		Asperger's disorder (N=67)		PDD NOS (N=50)		AS – PDD NOSa		Total (N=122)		Male (N=82)		Female (N=40)		Male – Femalea
	N	%	N	%	N	%	χ2 (df = 1)	p	N	%	N	%	N	%	χ2 (df = 1)	p
DSM IV criterion A1 "Qualitative impairment in social interaction"	5	100	67	100	47	94	4.13	0.08	119	98	80	98	39	98	0.00	1.00
DSM-IV Criterion A2: "Qualitative impairment in communication"	5	100	34	51	18	36	2.52	0.13	57	47	41	50	16	40	1.08	0.34
DSM-IV Criterion A3: "Restricted, repetitive and stereotyped behaviour, interests, and activities"	5	100	65	97	29	58	27.60	<0.001	99	81	70	85	29	73	2.91	0.14
G&G Criterion 1; "Social interaction problems"	5	100	67	100	47	96	4.13	0.08	119	98	80	98	39	98	0.00	1.00
G&G Criterion 2: "Narrow interests"	5	100	64	96	33	67	17.61	<0.001	102	84	69	84	33	83	0.05	0.80
G&G Criterion 3; "Repetitive routines"	5	100	61	91	25	51	24.77	<0.001	91	75	62	76	29	73	0.14	0.83
G&G Criterion 4: "Speech and language"	5	100	56	84	22	45	20.19	<0.001	83	69	57	70	26	65	0.25	0.68
G&G Criterion 5: "Non-verbal communication problems"	5	100	66	99	37	76	16.33	<0.001	108	89	74	90	34	85	0.73	0.38
G&G Criterion 6: "Motor clumsiness"	5	100	57	85	31	63	8.18	0.005	94	78	60	73	33	83	1.29	0.37

^aFisher's exact χ² test