Marijuana use predicts onset of current little cigar use in a national sample of US young adults

•Examined onset of cigar use by baseline marijuana use in young adults.•Examined onset of marijuana use by baseline cigar use in young adults.•Marijuana predicted later onset of little cigar, but not large cigar use.•Cigar use did not predict later onset of marijuana use.•Marijuana use may be a risk...

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Bibliographic Details
Published in:Drug and alcohol dependence 2018-09, Vol.190, p.235-241
Main Authors: Cohn, Amy M., Johnson, Amanda L., Fryer, Craig S., Villanti, Andrea C.
Format: Article
Language:English
Subjects:
Adults
Alcohol
Alcohol use
Alcohols
Cannabis
Cigars
Demographics
Demography
Drug use
Little cigars
Marijuana
Mathematical models
Menthol
Race
Smoking
Substance abuse
Survival analysis
Tobacco
Tobacco products
Truth
Young adults
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Summary:•Examined onset of cigar use by baseline marijuana use in young adults.•Examined onset of marijuana use by baseline cigar use in young adults.•Marijuana predicted later onset of little cigar, but not large cigar use.•Cigar use did not predict later onset of marijuana use.•Marijuana use may be a risk factor of cigar use onset in young adults. This study examined whether young adult marijuana use increases risk of subsequent large cigar (LC) and little cigar/cigarillo (LCC) use among naïve users. Data were from 8 waves of the Truth Initiative Young Adult Cohort, a national sample of US young adults aged 18–34 assessed every 6 months. Discrete-time survival analyses examined whether baseline ever marijuana use among never cigar users predicted onset of past 30-day LC and LCC use and whether baseline ever LC and LCC use among never marijuana users predicted onset of past 30-day marijuana use. Models adjusted for demographics, past 30-day alcohol use, past 30-day tobacco product use, and menthol tobacco use. In adjusted models, baseline ever marijuana use predicted onset of past 30-day LCC but not LC use. Cumulative risk ratios showed that 23% of ever marijuana users at baseline reported past 30-day use of LCCs by the end of wave 8 compared to just 3% of baseline never marijuana users. Race and past 30-day use of specific tobacco products also predicted onset of past 30-day LC and LCC use. Past 30-day use of alcohol uniquely predicted onset of past 30-day LCC use but not LC use. Baseline ever LC and LCC use did not predict onset of past 30-day marijuana use in models that adjusted for demographics, alcohol, and specific tobacco product use. Ever marijuana use among US young adults may be an important predictor of onset of regular LCC use. Findings suggest different pathways linking marijuana to different cigar sub-types.
ISSN:0376-8716
1879-0046
DOI:10.1016/j.drugalcdep.2018.01.020