Table 3.

Association between Co-Occurring Alcohol and Marijuana Use and History of Medication Nonadherence.

	History of Unintentional Medication Nonadherence			History of Purposeful Medication Nonadherence
Predictors	Adjusted Odds Ratio	95% Confidence Interval for aOR	p	Adjusted Odds Ratio	95% Confidence Interval for aOR	p
Step 1:χ2 (5) = 3.87, p = .57				Step 1:χ2 (5) = 6.21, p = .29
Age	0.92	0.73 – 1.14	.44	1.11	0.90 – 1.37	.35
Gender	1.01	0.40 – 2.59	.98	1.71	0.67 – 4.36	.26
Race	0.81	0.28 – 2.35	.70	0.36	0.12 – 1.06	.07
Education Status	0.40	0.14 – 1.09	.07	1.81	0.67 – 4.89	.24
Current Living Status	1.60	0.60 – 4.28	.35	0.51	0.19 – 1.36	.18
Step 2:χ2 (1) = 7.40, p < .01				Step 2:χ2 (1) = 10.04, p < .01
Co-Occurring Marijuana Use	3.30	1.48 – 7.92	< .01	3.98	1.63 – 9.67	< .01

Note. Results from separate logistic regression models where history of unintentional and purposeful nonadherence to medication (1 = history of nonadherence, 0 = no history of nonadherence) were the dependent variables. Codings for predictor variables were: gender [0 = female, 1 = male], race [0 = non-Caucasian, 1 = Caucasian], educational status [0 = not currently a student, 1 = currently a student], current living status [0 = with parents, 1 = on campus or in house or