Table 1.

Characteristic of participants

Characteristic	Autism, n = 770			Controls, n = 924			t	p value
	Range	Mean	SD	Range	Mean	SD
Age, years	6–30	14.88	5.47	6–30	14.79	5.75	0.33	0.742
IQ	57–149	106.22	16.91	71–149	113.42	12.73	− 9.73	p < 0.001
ADOSa	2–23	11.16	3.97	–
		n	%		n	%	χ2
Sex, male		667	86.62		693	75.00	35.85	p < 0.001

^aThere were 486 individuals with autism with available total ADOS score