Patterns of same-day alcohol and cannabis use in adolescents and young adults with risky alcohol use

Lara N. Coughlina Department of Psychiatry, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USA;b Addiction Center, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USA;c Injury Prevention Center, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USACorrespondence[email protected]
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Erin E. Bonara Department of Psychiatry, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USA;b Addiction Center, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USA;c Injury Prevention Center, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USAView further author information

Amy S. B. Bohnertd VA Center for Clinical Management Research, North Campus Research Complex, Ann Arbor, MI, USA;e Department of Anesthesiology, University of Michigan, Ann Arbor, MI, USAView further author information

Frederic C. Blowa Department of Psychiatry, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USA;b Addiction Center, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USA;d VA Center for Clinical Management Research, North Campus Research Complex, Ann Arbor, MI, USAView further author information

José A. Bauermeisterf Department of Family and Community Health, School of Nursing, University of Pennsylvania, Philadelphia, PA, USAView further author information

Yazmyn Crossa Department of Psychiatry, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USA;b Addiction Center, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USAView further author information

Rebecca Cunninghamc Injury Prevention Center, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USA;g Department of Emergency Medicine, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USAView further author information

Sean D. Youngh Department of Informatics, Donald Bren School of Information and Computer Sciences, University of California Irvine, Irvine, CA, USA;i Department of Emergency Medicine, School of Medicine, University of California Irvine, Irvine, CA, USAView further author information

Maureen A. Waltona Department of Psychiatry, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USA;b Addiction Center, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USA;c Injury Prevention Center, University of Michigan, North Campus Research Complex, Ann Arbor, MI, USAView further author information

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Abstract

Same-day alcohol and cannabis use is relatively common in adolescents and young adults, constituting a higher-risk behavior relative to single-substance use. However, the association between quantity of alcohol and cannabis use on co-use days is understudied. We examined the association between the quantity of alcohol and same-day cannabis use with a multilevel regression analysis in a sample of youth (16–24 years old) with risky alcohol use. Participants reported one or more days of alcohol and cannabis over the past month (N = 468). Quantity of cannabis use was highest on heavy drinking days [M = 0.91 grams, SD = 0.68] followed by moderate drinking days (M = 0.78 grams, SD = 0.63), and lowest on days without alcohol use (M = 0.74 grams, SD = 0.64, p < 0.001). In multilevel modeling analyses, adjusted for clustering within individuals, greater quantity of drinking on a given day was associated with greater cannabis use (estimate = 0.03, p < 0.001). When using alcohol and cannabis on the same day, greater alcohol use was associated with greater cannabis use. Preventing days of heavy use of multiple substances, particularly among at-risk drinkers, may complement interventions addressing co-use generally to prevent substance-related consequences.

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Funding

This work was funded by the National Institute on Alcohol Abuse and Alcoholism under grant #024175 and LNCs was supported by grant #028232.

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Patterns of same-day alcohol and cannabis use in adolescents and young adults with risky alcohol use

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Patterns of same-day alcohol and cannabis use in adolescents and young adults with risky alcohol use

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