. 2008 Oct 1;64(7):561–570. doi: 10.1016/j.biopsych.2008.05.023

Table 2.

Associations Between the Autism Subphenotypes

	SOC	BEH	DelayedPhrase	DelayedWord	Verbal	IQ ≥ 70
SOC	—	2025	1905	1946	2024	1395
BEH	.28 (< .0001)	—	1903	1944	2022	1393
DelayedPhrase	184.9 (< .0001)	.3 (.6)	—	1870	1903	1338
DelayedWord	88.7 (< .0001)	.1 (.7)	582.0 (< .0001)	—	1944	1360
Verbal	133.7 (< .0001)^a	68.9 (< .0001)	198.5 (< .0001)^a	94.6 (< .0001)^a	—	1393
IQ ≥ 70	83.5 (< .0001)^a	.03 (.9)	90.1 (< .0001)^a	29.9 (< .0001)^a	364.1 (< .0001)	—

The sample sizes are in the upper triangle and the strength of associations and p values are in the lower triangle. The strength of associations is calculated by correlation coefficient between SOC and BEH; chi-square statistic among DelayedPhrase, DelayedWord, Verbal, and IQ ≥ 70; and Kruskal-Wallis chi-square statistic between the quantitative traits (SOC and BEH) and the categorical traits (DelayedPhrase, DelayedWord, Verbal, and IQ ≥ 70).

BEH, behavior domain total scores; DelayedPhrase, delayed onset of first phrases; DelayedWord, delayed onset of first words; IQ ≥ 70, best estimate IQ ≥ 70; SOC, social interaction domain total scores; Verbal, verbal category status.

Negative association.