Table 3.

Child characteristics associated with portal adoption in multivariable logistic regression.^a

Characteristic at study start		Adoption versus no adoption, odds ratio (95% CI)a	P value
Child age 6-9 (vs 10-12) years		1.4 (1.1, 1.9)	.02
Male sex		0.9 (0.7, 1.2)	.6
Race
	White	Reference
	Black/African American	0.8 (0.5, 1.3)	.4
	Asian	0.9 (0.3, 2.5)	.8
	Other race	0.5 (0.3, 1.0)	.06
Hispanic ethnicity		0.9 (0.5, 1.8)	.8
Private insurance b		2.0 (1.3, 3.1)	.002
Asthma severity b
	Intermittent	Reference
	Mild persistent	1.9 (1.2, 3.0)	.009
	Moderate/severe persistent	1.9 (1.0, 3.5)	.04
On asthma controller medication		2.0 (1.5, 2.7)	<.001

^aThis model also controlled for primary care practice—odds ratios are not displayed. Practice setting and region were entered into models but dropped due to collinearity.

^bData on insurance type and asthma severity were only available for PeRC patients (7120/9133 or 77.96% of the total)—the results presented for these variables are from models including only PeRC participants, whereas the results for all other variables are from models including all participants.