Table 4.

Results from the multivariate multinomial regression model

Demographic variable	“Cognitive” class		“Behavioral” class
	RRR	95% CI	RRR	95% CI
Age	.98	.92, 1.05	1.04	.97, 1.12
Maternal age	.97	.92, 1.02	.97	.92, 1.02
Income
<$75,000	Ref	Ref	Ref	Ref
$75,000–$100,000	.75	.32, 1.75	.89	.32, 2.50
$100,000+	.53*	.29, .84	.69	.21, 1.48
Sex
Male	Ref	Ref	Ref	Ref
Female	.50*	.29, .83	.98	.51, 1.89
Self-identified ethnicity
White	Ref	Ref	Ref	Ref
Non-White	.61	.32, 1.14	.68	.31, 1.50
CHD
No	Ref	Ref	Ref	Ref
Yes	.67	.39, 1.14	.82	.42, 1.62

Ref reference group (“Normative” class serves as the overall reference group), CHD congenital heart defect, RRR relative risk ratio

*p <.05