Table 1.

Demographic differences between the preterm birth and term birth children with autism spectrum disorder (ASD)

Variable	Preterm ASD n = 18	Term ASD n = 44	P value
Gestational age, mean (SD), weeks	28 (2)	39 (1)	< 0.001
Birth body weight, mean (SD), grams	1024 (267)	3196 (391)	< 0.001
Age of examination, mean (SD), months	62 (4)	64 (16)	0.25
Male, n (%)	12 (67%)	38 (86%)	0.09
Intellectual disability, n (%)	4 (22%)	15 (34%)	0.54
Intelligence quotient, mean (SD); range	83 (16); 62–108	79 (23); 34–113	0.66