Table 5.

Proportion of Parents Reporting Concerns by Concern Type, Age, and Outcome Group

	Age
Concern Type	Group	6 Months	9 Months	12 Months
Language	ASD	16.7%	13.3%	13.3%
	HRA-N	24.6%	20.5%	38.6%
	LRC	7.4%	3.1%	6.2%
Social Communication	ASD	0%	6.7%	21.4%
	HRA-N	15.8%	13.6%	14.3%
	LRC	1.2%	0%	1.9%
RRB	ASD	8.3%	0%	7.1%
	HRA-N	14.0%	20.5%	23.8%
	LRC	2.5%	3.1%	3.8%
Medical	ASD	50%	60.0%	35.7%
	HRA-N	49.1%	29.5%	45.2%
	LRC	60.5%	46.2%	41.5%
Autism	ASD	25%	13.3%	57.1%
	HRA-N	36.8%	38.6%	45.2%
	LRC	11.1%	6.2%	11.3%

Note: RRB = Restrictive, Repetitive Behaviors, LRC = Low Risk Control, HRA-N = High-Risk Non-Outcome, ASD = High-Risk Autism Outcome