A dimensional approach to understanding severity estimates and risk correlates of marijuana abuse and dependence in adults.

International Journal of Methods in Psychiatric Research
Li-Tzy WuDan G Blazer

Abstract

While item response theory (IRT) research shows a latent severity trait underlying response patterns of substance abuse and dependence symptoms, little is known about IRT-based severity estimates in relation to clinically relevant measures. In response to increased prevalences of marijuana-related treatment admissions, an elevated level of marijuana potency, and the debate on medical marijuana use, we applied dimensional approaches to understand IRT-based severity estimates for marijuana use disorders (MUDs) and their correlates while simultaneously considering gender- and race/ethnicity-related differential item functioning (DIF). Using adult data from the 2008 National Survey on Drug Use and Health (N = 37,897), Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) criteria for MUDs among past-year marijuana users were examined by IRT, logistic regression, and multiple indicators-multiple causes (MIMIC) approaches. Among 6917 marijuana users, 15% met criteria for a MUD; another 24% exhibited subthreshold dependence. Abuse criteria were highly correlated with dependence criteria (correlation = 0.90), indicating unidimensionality; item information curves revealed redundancy in multiple criteria. MIMIC a...Continue Reading

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Citations

Apr 22, 2015·Substance Abuse : Official Publication of the Association for Medical Education and Research in Substance Abuse·Peter GatesJan Copeland
Sep 4, 2015·Alcoholism, Clinical and Experimental Research·Dvora ShmulewitzDeborah Hasin
Dec 10, 2013·Drug and Alcohol Dependence·Arpana AgrawalLaura J Bierut
Dec 18, 2013·Journal of Psychiatric Research·Li-Tzy WuUNKNOWN NIDA AAPI Workgroup
Oct 21, 2016·The American Journal on Addictions·Susan E LuczakSteve Sussman
Jan 15, 2017·Addictive Behaviors·Lisa DierkerJennifer Rose

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