Journal of Neurodevelopmental Disorders

Table 3 Intraclass correlation coefficients

From: Quantitative trait variation in ASD probands and toddler sibling outcomes at 24 months

	All sibling pairs			Concordant pairs			Discordant pairs
	n	ICC	p	n	ICC	p	n	ICC	p
ADI-R
Social	355	0.03	0.096	81	− 0.20	0.595	274	0.02	0.112
RRB	355	0.03	0.056	81	0.02	0.386	274	0.04	0.027
Nonverbal communication	66	0.12	0.041	29	0.28	0.038	37	0.07	0.043
Verbal communication	118	0.04	0.087	18	0.08	0.209	100	0.01	0.389
VABS-II
ABC	306	0.13	< 0.001⁺	65	0.27	0.005	241	0.09	0.008
Socialization	314	0.08	0.005	69	0.25	0.002⁺	245	0.03	0.207
Communication	313	0.22	< 0.001⁺	69	0.41	0.002⁺	244	0.14	0.006
Expressive	321	0.15	< 0.001⁺	71	0.35	0.001⁺	250	0.07	0.052
Receptive	322	0.23	< 0.001⁺	71	0.50	< 0.001⁺	251	0.12	0.008
Motor	281	0.11	0.027	62	0.05	0.344	219	0.11	0.053
Fine	282	0.09	0.094	61	0.00	0.506	221	0.09	0.125
Gross	281	0.21	< 0.001⁺	62	0.25	0.053	219	0.18	0.001⁺

⁺significant at p ≤ 0.004 after Bonferroni correction (12 comparisons per group)

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ISSN: 1866-1955

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