Table 5.

Final Model. Statistically Significant Dual Interactions.

	Comparison # 1		Comparison # 2		Comparison # 3		Comparison # 4		Comparison # 5
	Control BAC≥.05 versus Control BAC=.00		Crash BAC=.00 versus Control BAC=.00		Crash BAC≥.05 versus Control BAC≥.05		Crash BAC≥.05 versus Crash BAC=.00		Crash BAC≥.05 versus Control BAC=.00
	OR	P>z	OR	P>z	OR	P>z	OR	P>z	OR	P>z
21–24 * with passenger	2.137	0.036			0.393	0.049
21–24 * miles driven							1.002	0.020
55+ * African American							2.876	0.012	2.547	0.019
55+ * miles driven			1.001	0.027					1.002	0.010
Male * Work	2.935	0.030			0.268	0.038
Male * Bar							0.440	0.036	0.364	0.005
Male * African American	2.451	0.007
Male * Hispanic	2.215	0.043					3.096	0.004	2.654	0.012
Male * Other							4.453	0.017	3.716	0.035
Male * 4 p.m. – 7 p.m.			0.793	0.035
Male * 12 a.m. – 3 a.m.							0.433	0.035
Male * miles driven	1.003	0.013

Dual interactions were not simultaneously included in the model. Each interaction was evaluated separately, in different models. Main effects and nonsignificant dual interactions were not included to save space. Comparisons #1 through #5 were obtained by running a single multilogistic model twice, each time applying a different reference group. For comparisons #1, #2, and #5, the reference group was control drivers with a BAC=.00. For comparisons #3 and #4, the reference group included control and crash drivers with a BAC≥.05, respectively. In comparison #1, no crash is involved; therefore, crash severity (“Some Injury” and “PDO”) is that of the matching crashes.