Table 2.

Association of DDL with Wave 7 DWI by other independent variables using logistic regression

				W7DWI (Unadjusted model)				W7DWI (Adjusted model)
	N	DDL	N	OR	95% CI		p
Race/ethnicity
Latinos	501	No	361	Ref				Ref
		Yes	105	1.28	0.48	3.44	.61	1.26	0.41	3.86	.68
African Americans	444	No	278	Ref				Ref
		Yes	119	2.41	1.09	5.35	.03	2.46	0.90	6.71	.08
Whites	837	No	587	Ref				Ref
		Yes	194	0.73	0.42	1.26	.24	0.64	0.34	1.19	.15
Onset age of alcohol use
≥ 14 years	1267	No	876	Ref				Ref
		Yes	296	1.21	0.84	1.73	.28	1.14	0.73	1.77	.56
14 or younger	374	No	232	Ref				Ref
		Yes	111	0.41	0.24	0.71	<.01	0.31	0.17	0.59	<.01
Urbanicity
Urban	531	No	369	Ref				Ref
		Yes	117	0.36	0.33	0.40	<.001	0.26	0.20	0.36	<.001
Suburban/rural	1185	No	837	Ref				Ref
		Yes	271	1.004	0.74	1.37	.98	0.91	0.61	1.36	.62

Note: We reported the results of subsequent stratified analyses only if the association of W7 DWI and DDL was statistically significant in any category of other independent variables. OR: odds ratio; CI: confidence interval; DDL: delayed driving licensure; DWI: driving while impaired. The analyses were conducted among those who reported having a license allowing independent, unsupervised driving using the domain analysis.

Unadjusted model: the three independent variables were included in three separate models; Adjusted model: All three independent variables were included in the model.