Table 3.

Mixed-effects logistic regression analysis for traumatic unintentional injury hospitalizations for patients who tested postive for BAC at the time of hospitalization, Illinois, 2006–2015 (n = 1,079)

	Coefficient	Std. Error	t	p-value	Odds ratio	Confidence Interval (95%)
Intercept	−1.805	0.1662	−10.863	0.000	0.164	0.119–0.228
2015	−0.688	0.1706	−4.033	0.000	0.503	0.36–0.702
2014	−0.734	0.1778	−4.125	0.000	0.48	0.339–0.681
2013	−0.162	0.1542	−1.047	0.295	0.851	0.629–1.151
2012	−0.115	0.1483	−0.775	0.438	0.891	0.667–1.192
2011	−0.21	0.1458	−1.441	0.150	0.81	0.609–1.079
2010	−0.412	0.1494	−2.755	0.006	0.663	0.494–0.888
2009	−0.179	0.1422	−1.26	0.208	0.836	0.633–1.105
2008	−0.239	0.1414	−1.693	0.090	0.787	0.597–1.039
2007	−0.104	0.1353	−0.765	0.444	0.902	0.692–1.176
2006	0b	~	~	~	~	~
Age	0.405	0.0307	13.19	0.000	1.499	1.411–1.592
Gender	−0.072	0.0838	−0.861	0.389	0.93	0.79–1.096
Age*gender	−0.036	0.0518	−0.69	0.490	0.965	0.872–1.068
White	0.583	0.1154	5.056	0.000	1.792	1.429–2.246
Insurance	−0.275	0.0814	−3.372	0.001	0.76	0.648–0.891
Minors under 21a	0.097	0.1097	0.888	0.374	1.102	0.889–1.367
Minors under 21a*age	−0.106	0.0551	−1.929	0.054	0.899	0.807–1.002

Note:

Years indicate year of hospitalization

Of all the 1,243 cities in Illinois, over a 1000 cities responded to the Illinois Liquor Control Commission (ILCC) survey of local liquor-related ordinances. Of the 1000 cities that responded to the survey, 66.7 unique cities (n = 667) matched the home cities of young patients in this study. Of these cities, 514 responded to the question that asked whether minors under 21 years old are allowed in bars and taverns (yes vs. no). Cities whose responses were missing or unknown were excluded from the analysis

^aMinors under 21 allowed in bars and taverns that sell liquor

^bThis coefficient is set to zero because it is redundant

Age* gender = interactions between age and gender

Minors under 21* age= interactions between minors under 21 and age