. Author manuscript; available in PMC: 2010 Aug 17.

Published in final edited form as: J Autism Dev Disord. 2008 Dec 12;39(5):693–705. doi: 10.1007/s10803-008-0674-3

Table 4.

Multiple Linear Regression Models for Calibrated Severity Scores and ADOS Raw Totals in ASD Assessments

DV=Severity Score (ASD only, N=1465)

	R²	F change	df	B	SE B	β
Step 1^a	.10	164.78	1,1463
Constant^*				8.5	.11
Verbal IQ^*				−.02	.001	−.32

DV=Raw Total (ASD only, N=1465)

	R²	F change	df	B	SE B	β

Step 1	.43	1101.66	1,1463
Constant^*				24.14	.24
Verbal IQ^*				−.12	.004	−.66

Step 2 ^b	.44	10.42	1,1462
Constant^*				24.05	.24
Verbal IQ^*				−.12	.004	−.67
Mat Ed^*				.94	.29	.07

Note. DV=Dependent variable; Mat Ed=Dummy coded variable separating mothers with graduate or professional education to those of all other educational levels.

All other variables excluded from the stepwise forward model.

Change in R²=.004 for Step 2 (p<.001)

p<.001