Co-Use of Alcohol and Cannabis: Longitudinal Associations with Mental Health Outcomes in Young Adulthood

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dc.contributor.authorThompson, Kara
dc.contributor.authorHolley, Maria
dc.contributor.authorSturgess, Clea
dc.contributor.authorLeadbeater, Bonnie J.
dc.date.accessioned2021-04-12T17:19:06Z
dc.date.available2021-04-12T17:19:06Z
dc.date.copyright2021en_US
dc.date.issued2021
dc.description.abstractIncreases in cannabis use among young people has heightened concern about the potential interactive health effects of cannabis with other drugs. We examined the longitudinal association between concurrent and simultaneous (SAM) co-use of alcohol and cannabis in young adulthood on mental health symptoms, substance use behaviors, and substance-related harms two years later. Data were drawn from Time 5 (T5; n = 464; 46% male) and 6 (T6; n = 478; 45% male) of the Victoria Healthy Youth Survey. At T5, 42% of participants used alcohol-only, 13% used concurrently, 41% used SAM, 1% were cannabis only users, and 3% abstained from cannabis and alcohol. Boys were more likely to use SAM. Higher T5 SAM use frequency was associated with heavier use of substances, more substance-related harms, and symptoms of psychosis and externalizing problems at T6. T5 Concurrent use was associated with conduct symptoms, illicit drug use, and alcohol use disorders at T6 relative to alcohol-only use. Cannabis is commonly used with alcohol and the findings suggest that any co-use (concurrent or simultaneous) may be problematic in young adulthood. Public health messages need to explicitly inform consumers about the possible consequences of using both alcohol and marijuana and the addictive pharmacological impact of using them together.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThis research was funded by grants from the Canadian Institutes of Health Research (#43275; #79917; #93533; #130500).en_US
dc.identifier.citationThompson, K., Holley, M., Sturgess, C., & Leadbeater, B. (2021). Co-Use of Alcohol and Cannabisa: Longitudinal Associations with Mental Health Outcomes in Young Adulthood. International Journal of Environmental Research and Public Health, 18(7), 1-11. https://doi.org/10.3390/ijerph18073652.en_US
dc.identifier.urihttps://doi.org/10.3390/ijerph18073652
dc.identifier.urihttp://hdl.handle.net/1828/12845
dc.language.isoenen_US
dc.publisherInternational Journal of Environmental Research and Public Healthen_US
dc.subjectSAM
dc.subjectalcohol
dc.subjectmarijuana
dc.subjectmental health
dc.subjectconcurrent use
dc.subjectsimultaneous use
dc.subjectyoung adults
dc.subject.departmentDepartment of Psychology
dc.titleCo-Use of Alcohol and Cannabis: Longitudinal Associations with Mental Health Outcomes in Young Adulthooden_US
dc.typeArticleen_US

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