. Author manuscript; available in PMC: 2021 Mar 1.

Published in final edited form as: Autism Res. 2020 Jan 20;13(3):474–488. doi: 10.1002/aur.2261

TABLE 6.

Linear Regression Analyses of Clinical Predictors of Age at Diagnosis

Variable	Total Sample (n = 296)			Males (n = 240)			Females (n = 56)
	Model R²	β	P Value	Model R²	β	P Value	Model R²	β	P Value
Overall model	.108		<.001	.118		<.001	.119		.161
ADOS-2 RRB		−.114	.062		−.082	.221		−.248	.115
VABS-II ABC		−.119	.051		−.108	.109		−.180	.232
Verbal “Yes”		.177	.005		.198	.004		.135	.394
Number of psychiatric Dx		.168	.005		.195	.003		.065	.676

Abbreviations: ABC, adaptive behavior composite; ADOS-2, Autism Diagnostic Observation Schedule, Second Edition; Dx, diagnoses; RRB, restricted, repetitive behavior; VABS-II, Vineland Adaptive Behavior Scales, Second Edition.