Table 3.

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

				W7RWI (Unadjusted model)				W7RWI (Adjusted model)
	N	DDL	N	OR	95% CI		p
Race/ethnicity
Latinos	835	No	216	Ref				Ref
		Yes	459	0.63	0.27	1.51	.28	0.65	0.25	1.67	.36
African Americans	687	No	385	Ref				Ref
		Yes	199	2.72	1.15	6.41	.02	3.48	1.27	9.58	.02
Whites	1106	No	595	Ref				Ref
		Yes	299	1.23	0.79	1.91	.35	1.37	0.85	2.20	.18
Participant highest education by W7
High school or lower	979	No	532	Ref				Ref
		Yes	247	2.51	1.29	4.88	<.01	2.52	1.23	5.13	.02
Some college	924	No	530	Ref				Ref
		Yes	242	0.94	0.59	1.49	.78	1.05	0.78	1.41	.86
Bachelor or higher	626	No	327	Ref				Ref
		Yes	192	1.74	0.91	3.35	.09	1.76	0.83	3.74	.13
Urbanicity
Urban	905	No	497	Ref				Ref
		Yes	247	0.54	0.42	0.70	<.001	0.69	0.27	0.90	.02
Suburban/rural	1629	No	898	Ref				Ref
		Yes	412	1.28	0.91	1.80	.15	1.54	1.01	2.34	.05

Note: We reported the results of subsequent stratified analyses only if the association of W7 RWI and DDL was statistically significant in any category of other independent variables. OR: odds ratio; CI: confidence interval; DDL: driving while impaired; RWI: riding with an impaired Unadjusted model: the three independent variables were included in three separate models; Adjusted model: All three independent variables were included in the model.