Empirical Profiles of Alcohol and Marijuana Use, Drugged Driving, and Risk Perceptions
posted 31/10/2017
publication Journal of Studies on Alcohol and Drugs, 78(6), 889–898 (2017).
Brooke J. Arterberry , Ph.D.,a,* Hayley Treloar , Ph.D.,b & Denis M. McCarthy , Ph.D.cAffiliations
aDepartment of Psychiatry, University of Michigan Addiction Center, Ann Arbor, Michigan
bCenter for Alcohol and Addiction Studies, Brown University, Providence, Rhode Island
cDepartment of Psychological Sciences, University of Missouri, Columbia, Missouri
*Correspondence may be sent to Brooke J. Arterberry at the Department of Psychiatry, University of Michigan Addiction Center, Rachel Upjohn Building, 4250 Plymouth Road, Room 2437, Ann Arbor, MI 48109, or via email at: barterb@med.umich.edu.
https://doi.org/10.15288/jsad.2017.78.889
Received: January 26, 2017
Accepted: May 26, 2017
Published Online: October 31, 2017
Abstract
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Objective:
The present study sought to inform models of risk for drugged driving through empirically identifying patterns of marijuana use, alcohol use, and related driving behaviors. perceived dangerousness and consequences of drugged driving were evaluated as putative influences on risk patterns.
Method:
We used latent profile analysis of survey responses from 897 college students to identify patterns of substance use and drugged driving. We tested the hypotheses that low perceived danger and low perceived likelihood of negative consequences of drugged driving would identify individuals with higher-risk patterns.
Results:
Findings from the latent profile analysis indicated that a fourprofile model provided the best model fit. Low-level engagers had low rates of substance use and drugged driving. Alcohol-centric engagers had higher rates of alcohol use but low rates of marijuana/simultaneous use and low rates of driving after substance use. Concurrent engagers had higher rates of marijuana and alcohol use, simultaneous use, and related driving behaviors, but marijuana-centric/simultaneous engagers had the highest rates of marijuana use, co-use, and related driving behaviors. Those with higher perceived danger of driving while high were more likely to be in the low-level, alcohol-centric, or concurrent engagers’ profiles; individuals with higher perceived likelihood of consequences of driving while high were more likely to be in the low-level engagers group.
Conclusions:
Findings suggested that college students’ perceived dangerousness of driving after using marijuana had greater influence on drugged driving behaviors than alcohol-related driving risk perceptions. These results support targeting marijuana-impaired driving risk perceptions in young adult intervention programs.
