Risk factors of emerging adults reporting concurrent use of e-cigarettes with THC/cannabis

Objective Examine the prevalence of concurrent cannabis/THC vaping among those transitioning from high school to college who had ever used e-cigarettes and identify sociodemographic and personal factors associated with risk of cannabis/THC vaping among students in this population. Participants Incoming undergraduate students reporting ever using e-cigarettes (N = 529) attending a public university in the southeastern United States. Methods Cross-sectional survey administered November 2018. Comparisons of sociodemographic and personal characteristics between those who had vaped cannabis/THC and those who had not were done using chi-square test of association, or Fisher's exact test or the two-sample t-test. Predictors of cannabis/THC vaping status were determined using logistic regression. Results Slightly more than a quarter had ever vaped cannabis/THC (26%). Of those who had ever vaped with cannabis/THC, most said they used cannabis/THC "sometimes" when they vaped (78%). The significant predictors of cannabis/THC vaping status included membership or planned membership in a fraternity or sorority, ever use of alcohol, level of stress, number of five closest friends who currently use marijuana, and whether family member(s) use marijuana. Discussion Collaborative tailored prevention and treatment efforts are needed on college campuses to curb vaping/use of cannabis and resulting polysubstance use.