• Drug Alcohol Depend · Sep 2014

    Patterns of concurrent substance use among nonmedical ADHD stimulant users: results from the National Survey on Drug Use and Health.

    • Lian-Yu Chen, Rosa M Crum, Silvia S Martins, Christopher N Kaufmann, Eric C Strain, and Ramin Mojtabai.
    • Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, 624 N. Broadway, 7th Floor, Baltimore, MD 21205, United States; Center for Drug Safety and Effectiveness, Johns Hopkins University, 615 N. Wolfe Street W6035, Baltimore, MD 21205, United States. Electronic address: liachen@jhsph.edu.
    • Drug Alcohol Depend. 2014 Sep 1; 142: 86-90.

    AimsTo examine patterns of concurrent substance use among adults with nonmedical ADHD stimulant use.MethodsWe used latent class analysis (LCA) to examine patterns of past-year problematic substance use (meeting any criteria for abuse or dependence) in a sample of 6103 adult participants from the National Surveys on Drug Use and Health 2006-2011 who reported past-year nonmedical use of ADHD stimulants. Multivariable latent regression was used to assess the association of socio-demographic characteristics, mental health and behavioral problems with the latent classes.ResultsA four-class model had the best model fit, including (1) participants with low probabilities for any problematic substance use (Low substance class, 53.3%); (2) problematic users of all types of prescription drugs (Prescription drug class, 13.3%); (3) participants with high probabilities of problematic alcohol and marijuana use (Alcohol-marijuana class, 28.8%); and (4) those with high probabilities of problematic use of multiple drugs and alcohol (Multiple substance class, 4.6%). Participants in the 4 classes had distinct socio-demographic, mental health and service use profiles with those in the Multiple substance class being more likely to report mental health and behavioral problems and service use.ConclusionNonmedical users of ADHD stimulants are a heterogeneous group with a large subgroup with low prevalence of problematic use of other substances. These subgroups have distinct patterns of mental health comorbidity, behavior problems and service use, with implications for prevention and treatment of nonmedical stimulant use.Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

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