Table 3.

Cross-classification of diagnostic status and likely latent class membership (n = 204)

	N	Proportion of diagnostic phenotypes in each latent class				Test of proportions by class (p < 0.05)
		Class 1: Accelerated	Class 2: Normative	Class3: Language/Motor Delays	Class 4: Developmental Slowing
Unaffected	121	38.8	49.6	11.6	0.0	(1=2)>3>4
Broader Autism Phenotype	31	16.1	32.3	45.2	6.5	3>1, 2>4, 3>4
Autism Spectrum Disorder	52	1.9	25.0	30.8	42.3	4>2>1, 3>1
Early Identified	27	0.0	14.8	29.6	55.6	4>3>2>1
Later Identified	25	4.0	36.0	32.0	28.0	(2=3=4)>1

Within-class proportions of diagnostic categories.