Table 2.

Logistic Regression Results for Lifetime Methamphetamine Use Stratified by Age

	18–39 Years (n = 227)			≥ 40 Years (n = 415)
Variable	AOR	95% CL	p value	AOR	95% CI	p value
Ethnicity × IDU
African-American non-injector	1.00	-	-	1.00	-	-
African-American Injector	5.97	(1.33, 26.86)	.020	5.31	(1.98, 14.24)	.001
White/Hispanic Injector	15.46	(5.33,44.82)	.001	15.35	(4.97, 47.39)	.001
White/Hispanic, non-injector	26.36	(9.92, 70.08)	.001	18.52	(6.85, 50.05)	.001
African-American Injector	NA	NA	NA	5.31	(1.98, 14.24)	.001
Drug-User Support	2.13	(0.53, 8.48)	.286	4.68	(1.00, 21.93)	.051
Tattoos (3 or more)	2.19	(1.02, 4.71)	.045	0.68	(0.25, 1.81)	.440
Multiple Serious+ Drug Use, Lifetime	3.90	(1.59, 9.59)	.003	23.08	(6.98, 76.33)	.001
Binge Drinker	2.81	(1.11, 7.12)	.030	5.98	(2.62, 1361)	.001

⁺Use of 2 or more of the following: crack, cocaine, heroin, methadone, heroine + cocaine and hallucinogens

⁺⁺Use of any drug by injection