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. 2016 Mar;77(2):309-16.
doi: 10.15288/jsad.2016.77.309.

Risk Factors for Driving After and During Marijuana Use

Elizabeth R Aston  1 , Jennifer E Merrill  1 , Denis M McCarthy  2 , Jane Metrik  3   1
Affiliations

Risk Factors for Driving After and During Marijuana Use

Elizabeth R Aston et al. J Stud Alcohol Drugs. 2016 Mar.

Abstract

Objective: Use of marijuana before or while driving significantly contributes to driving impairment and elevated risk of motor vehicle accidents; however, this risk behavior is common among users. Little is known about the etiology of driving while under the influence of marijuana.

Method: Guided by social learning theory, this study examined marijuana outcome expectancies and other driving-related cognitions as predictors of the frequency of driving after smoking marijuana (DASM) and smoking marijuana while driving (SMWD). A community sample of 151 (64% male) non-treatment-seeking frequent marijuana users completed questionnaires on variables of interest.

Results: Perceived driving-related peer norms (i.e., perception that fewer friends disapprove of DASM and SMWD and of riding with a driver under the influence of marijuana) were associated with lower frequency of both DASM and SMWD. Perceived dangerousness of DASM was also associated with decreased frequency of DASM.

Conclusions: Our findings suggest a range of potentially important targets for interventions intended to reduce the likelihood and frequency of driving while under the influence of marijuana.

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