Table 10. Multivariate analysis by logistic regression of the results.

^*P<0.05 considered statistically significant

Variable	Odds ratio	95% confidence interval	P-value*
Age, years	0.85	0.72-0.98	0.028
Gender, male vs. female	1.42	0.95-2.11	0.087
Awareness of prohibition laws	2.18	1.45-3.29	<0.001
Reason for substance use (coping with stress)	1.78	1.12-2.84	0.016