. 2023 Feb 24;14:1134396. doi: 10.3389/fpsyt.2023.1134396

TABLE 1.

Characteristics of ASD and DD groups.

	ASD (N = 4,138)		DD (N = 711)		P-value
	Mean/Number	SD/%	Mean/Number	SD/%
Age (years)	4.21	1.23	4.21	1.26	0.130
Gender of child
Male	3,451	83.40	542	76.23	<0.001
Female	687	16.60	169	23.77
Only children
No	1,969	47.58	355	49.93	0.255
Yes	2,169	52.42	356	50.07
Comorbidity^a
No	3,338	80.67	537	75.53	0.002
Yes	800	19.33	174	24.47
Higher education degree-father
No	1,369	33.08	287	40.37	<0.001
Yes	2,769	66.92	424	59.63
Higher education degree-mother
No	1,379	33.33	289	40.65	<0.001
Yes	2,759	66.67	422	59.35
Family annual income^b	22448.87	25124.34	19521.42	19295.19	0.067

ASD, autism spectrum disorder; DD, developmental delay. ^aIncluding intellectual disabilities (ID) and attention deficit and hyperactivity disorder (ADHD). ^bUSD, $.