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. 2013 Jun;52(6):716-23.
doi: 10.1016/j.jadohealth.2012.12.006. Epub 2013 Feb 25.

Prevalence and patterns of polysubstance use in a nationally representative sample of 10th graders in the United States

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Prevalence and patterns of polysubstance use in a nationally representative sample of 10th graders in the United States

Kevin P Conway et al. J Adolesc Health. 2013 Jun.

Abstract

Purpose: The current study examines the prevalence and demographic correlates of self-reported substance use and identifies subgroups of polysubstance users among a cohort of United States 10th-grade students.

Methods: A nationally representative school-based cohort of United States 10th-grade students completed the NEXT Generation Health Study baseline survey in spring 2010 (N = 2,524).

Results: Past-year use of marijuana was most common among illicit drugs (26%), followed by misuse of medication (9%) and use of other illicit drugs (8%). During the past month, alcohol use was reported by more than one third (35%), binge drinking by 27%, and cigarette smoking by 19%. Results further show that substance use varied somewhat by demographic characteristics. Results from the latent class analysis of polysubstance use indicated a four-class solution as the best-fitting model; class 1 (59%) included the nonuser group; class 2 (23%) comprised the predominant alcohol user group; class 3 (11%) formed the predominant marijuana user group; and class 4 (8%) was characterized as the predominant polysubstance user group. Somatic and depressive symptoms varied significantly by class membership, with predominant polysubstance users reporting elevated levels of somatic and depressive symptoms.

Conclusions: The findings from this national study of 10th-grade students indicate high rates of substance and polysubstance use. The high level of depressive and somatic symptoms among polysubstance users indicates the need for mental health screening and referral.

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Conflict of interest statement

Conflicts of Interest: No conflicts of interest are reported.

Figures

Figure 1
Figure 1
Item Probability for Each Latent Class in the Four-Class Model and Associations with Depressive and Somatic Symptomatology Note. Classification of individuals was based on their most likely latent class membership; the model included demographic covariates. Two categories with different superscripts were significantly different in mean report of symptoms, according to Wald Chi-square test statistics at an alpha of 0.05. The response options for depressive symptoms were 1=never, 2=seldom, 3=sometimes, 4=often, 5=always; and the response options for somatic symptoms were 1=rarely or never, 2=about every month, 3=about every week, 4=more than once a week, 5=about every day.

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