Is Earlier Better? The Relationship between Age When Starting Early Intervention and Outcomes for Children with Autism Spectrum Disorder: A Selective Review

Table 4

Percentages of results across studies showing that earlier is better for domain outcomes.

	Outcome domain
	Cognitive	Adaptive	ASD severity	Language	Social
# yes/# that tested	6/12	2/6	3/7	4/6	3/6
# no/# that tested	6/12	4/6	4/7	4/7	3/6
% earlier age predicted better outcomes (M = 49.4%)	54.5%	33.3%	42.8%	66.6%	50%