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. Author manuscript; available in PMC: 2015 Apr 7.

Published in final edited form as: J Dev Behav Pediatr. 2014 Feb-Mar;35(2):85–92. doi: 10.1097/DBP.0000000000000014

Table 4.

Correlation Matrix and Effect Sizes for Demographic Variables of Interest

	Yearly Income		Maternal Education
	r	R² F(df_Between df_Within)	r	R² F(df_Between df_Within)
Maternal Education, yr	.60^b	--	--	--
Age, mo	-.14^a	.019^a 5.49 (1, 283)	-.14^a	.018^a 6.05 (1, 323)
M-CHAT	ns	--	ns	--
Mullen VR^d	ns	--	ns	--
Mullen FM^e	ns	--	ns	--
Mullen RL^f	ns	--	ns	--
Mullen EL^g	ns	--	ns	--
Vineland Communication SS^h	.17^b	.028^b 8.00 (1, 282)	.14^a	.020^a 6.49 (1, 322)
Vineland DLSⁱ SS	ns	--	ns	--
Vineland Socialization SS	.14^a	.019^a 5.57 (1, 282)	.11^a	.012^a 4.00 (1, 322)
Vineland Motor SS	.19^b	.034^b 10.05 (1, 282)	.16^b	.025^b 8.17 (1, 322)
CARS^j	ns	--	ns	--

^a

p<0.05.

^b

p<0.01.

^c

M-CHAT: Modified Checklist for Autism in Toddlers.

^d

VR: Visual Reception.

^e

FM: Fine Motor.

^f

RL: Receptive Language.

^g

EL: Expressive Language.

^h

SS: Standard Score.

ⁱ

DLS: Daily Living Skills.

^j

CARS: Childhood Autism Rating Scale.