Table 3.

Multivariate Logistic Regression Odds Ratios (95% Confidence Intervals) for Presence of Alcohol and/or Drugs in Trauma and Hospital (T&H) (N=571) and in Trauma Center Only (TCO) (N=277) Groups for Adolescents, 10–20 Years Old, Hospitalized with Assault Injuries, Maryland, 1995–1998

Alcohol and/or Drugs Present vs. Alcohol and Drugs Not Present
Demographic/Injury Characteristic	T& H Model	TCO Model
Age Group (10–14)†
15–17	1.94 (0.83, 4.51)	5.17 (1.45, 18.40)*
18–20	1.91 (0.85, 4.32)	4.41 (1.26, 15.48)*
Sex (Female)
Male	2.47 (1.35, 4.49)*	1.77 (0.64, 4.90)
Race (White)
African American	1.01 (0.58, 1.75)	1.92 (0.67, 5.48)
Other	0.42 (0.15, 1.23)	1.96 (0.18, 21.86)
Region (Southern & Eastern Shore Area)
Northwest Area	0.92 (0.18, 4.77)	0.30 (0.01, 11.96)
Baltimore Metro Area	0.71 (0.27, 1.89)	0.19 (0.01, 2.40)
National Capital Area	1.98 (0.68, 5.71)	0.30 (0.02, 4.94)
Out of State	1.65 (0.44, 6.12)	0.30 (0.02, 4.94)
Length of Hospital Stay in Days	1.00 (0.96, 1.04)	0.97 (0.92, 1.03)
Injury Severity Score at Discharge	0.99 (0.97, 1.01)	1.01 (0.98, 1.04)
Mechanism of Injury (Struck)
Cut	1.83 (1.06, 3.19)*	0.37 (0.10, 1.33)
Firearm	1.49 (0.88, 2.50)	0.36 (0.12, 1.03)
Other	1.07 (0.49, 2.35)	1.85 (0.15, 23.26)
Day of Hospital Admittance (Tuesday)
Sunday	2.10 (1.01, 4.39)*	1.13 (0.36, 3.51)
Monday	1.37 (0.68, 2.78)	1.60 (0.49, 5.18)
Wednesday	1.82 0.88, 3.77)	0.47 (0.15, 1.47)
Thursday	1.74 (0.85, 3.58)	1.00 (0.27, 3.65)
Friday	0.76 (0.38, 1.52)	1.15 (0.35, 3.81)
Saturday	1.36 (0.70, 2.66)	1.22 (0.38, 3.97)
Time of Day (12–3:59 PM)
4–7:59 P.M.	0.42 (0.18, 0.97)*	0.72 (0.17, 3.01)
8–11:59 P.M.	0.53 (0.24, 1.16)	1.49 (0.39, 5.66)
12–3:59 A.M.	0.96 (0.45, 2.06)	2.54 (0.67, 9.68)
4–7:59 A.M.	1.42 (0.60, 3.37)	1.98 (0.36, 10.79)
8–11:59 A.M.	1.72 (0.58, 5.07)	0.23 (0.03, 2.07)
Disposition of Patient (Home)
Died	1.58 (0.49, 4.94)	0.68 (0.19, 2.45)
Other	1.33 (0.67, 2.64)	1.84 (0.50, 6.85)

^*Note. p < 0.05.

^†The reference category is presented in parentheses for each demographic and injury characteristic.