Table 3.

Predictors of age at diagnosis of autism

	Estimate	Std. error	t value	p
(Intercept)	14.056	1.105	12.716	0.000***
MAT-AGE	− 0.038	0.034	− 1.107	0.270
MAT-EDU	− 0.661	0.258	− 2.564	0.011*
PAT-AGE	− 0.045	0.028	− 1.604	0.111
PAT-EDU	0.130	0.240	0.543	0.588
shared household	− 0.875	0.355	− 2.469	0.014*
SES	− 0.496	0.269	− 1.843	0.067ǂ
ADOS-COM	0.083	0.098	0.846	0.399
ADOS-SOC	− 0.212	0.058	− 3.667	0.000***
ADOS-RRBI	− 0.243	0.103	− 2.36	0.019*
MR	− 0.208	0.328	− 0.633	0.528

MAT-AGE maternal age at birth of ASD child, MAT-EDU maternal education, PAT paternal, SES socioeconomic status, ADOS-COM communication domain of the Autism Diagnostic Observation Schedule, ADOS-SOC social domain of the Autism Diagnostic Observation Schedule, ADOS-RRBI restrictive and repetitive behaviors and interest domain of the Autism Diagnostic Observation Schedule, MR mental retardation

Significance codes: ***p < 0.001, **p < 0.01, *p < 0.05, ǂp < 0.1