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Drug Alcohol Depend. 2019 Feb 1;195:193-197. doi: 10.1016/j.drugalcdep.2018.11.016. Epub 2019 Jan 9.

Driving under the influence of cannabis among medical cannabis patients with chronic pain.

Author information

1
University of Michigan Addiction Center, Department of Psychiatry, University of Michigan School of Medicine, 4250 Plymouth Road, Ann Arbor, MI, 48109, United States; University of Michigan Injury Prevention Center, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC10-G080, Ann Arbor, MI, 48109, United States. Electronic address: erinbona@med.umich.edu.
2
University of Michigan Addiction Center, Department of Psychiatry, University of Michigan School of Medicine, 4250 Plymouth Road, Ann Arbor, MI, 48109, United States.
3
University of Michigan Addiction Center, Department of Psychiatry, University of Michigan School of Medicine, 4250 Plymouth Road, Ann Arbor, MI, 48109, United States; Department of Psychology, Iowa State University, 901 Stange Road, Ames, IA, 50011, United States.
4
University of Michigan Addiction Center, Department of Psychiatry, University of Michigan School of Medicine, 4250 Plymouth Road, Ann Arbor, MI, 48109, United States; University of Michigan Injury Prevention Center, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC10-G080, Ann Arbor, MI, 48109, United States.
5
University of Michigan Addiction Center, Department of Psychiatry, University of Michigan School of Medicine, 4250 Plymouth Road, Ann Arbor, MI, 48109, United States; VA Center for Clinical Management Research, VA Ann Arbor Healthcare System, 2215 Fuller Road, Ann Arbor, MI, 48105, United States.

Abstract

BACKGROUND:

Driving under the influence of cannabis (DUIC) is a public health concern among those using medical cannabis. Understanding behaviors contributing to DUIC can inform prevention efforts. We evaluated three past 6-month DUIC behaviors among medical cannabis users with chronic pain.

METHODS:

Adults (N = 790) seeking medical cannabis certification or recertification for moderate/severe pain were recruited from February 2014 through June 2015 at Michigan medical cannabis clinics. About half of participants were male (52%) and 81% were White; their Mean age was 45.8 years. Participants completed survey measures of DUIC (driving within 2 h of use, driving while "a little high," and driving while "very high") and background factors (demographics, alcohol use, etc.). Unadjusted and adjusted logistic regressions were used to examine correlates of DUIC.

RESULTS:

For the past 6 months, DUIC within 2 h of use was reported by 56.4% of the sample, DUIC while a "little high" was reported by 50.5%, and "very high" was reported by 21.1%. Greater cannabis quantity consumed and binge drinking were generally associated with DUIC behaviors. Higher pain was associated with lower likelihood of DUIC. Findings vary somewhat across DUIC measures.

CONCLUSIONS:

The prevalence of DUIC is concerning, with more research needed on how to best measure DUIC. Prevention messaging for DUIC may be enhanced by addressing alcohol co-consumption.

KEYWORDS:

Cannabis use; Driving under the influence; Medical Cannabis; Risky driving

PMID:
30638777
PMCID:
PMC6359955
[Available on 2020-02-01]
DOI:
10.1016/j.drugalcdep.2018.11.016

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