. Author manuscript; available in PMC: 2019 Mar 1.

Published in final edited form as: J Child Psychol Psychiatry. 2017 Sep 26;59(3):258–267. doi: 10.1111/jcpp.12808

Table 3. Results of linear mixed model predicting academic skills from age 9 to 18.

		Estimates	Standard Error
Arithmetic GE	Age^**	−7.288	773
	FSIQ at age 9^**	.158	.025
	Age x FSIQ^**	−.117	.025
Word Reading GE	Age^**	−8.650	.619
	FSIQ at age 9^**	.124	.020
	VABS-ELAE^*	.033	.015
	ASD diagnosis^*	−.313	.153
	Age x FSIQ^**	−.099	.021
Spelling GE	Age^**	−5.930	.878
	FSIQ at age 9^**	.702	.156
	Age × FSIQ^*	−.084	.030

^**

p<0.01,

p<0.05, GE Grade Equivalents; FSIQ Full-Scale IQ, VABS-ELAE Vineland Adaptive Behavioral Scale Expressive Language Age Equivalents. All variables except for the VABS-ELAE for Word Reading (p=0.06) were still significant when analyses were performed based on the sample without missing data. FSIQ and VABS-ELAE were centered at 100 and 9 years respectively.