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. 2012 May;73(5):e588-93.
doi: 10.4088/JCP.11m07345.

A longitudinal investigation of the role of self-medication in the development of comorbid mood and drug use disorders: findings from the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC)

Samuel Lazareck  1 , Jennifer A Robinson, Rosa M Crum, Ramin Mojtabai, Jitender Sareen, James M Bolton
Affiliations

A longitudinal investigation of the role of self-medication in the development of comorbid mood and drug use disorders: findings from the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC)

Samuel Lazareck et al. J Clin Psychiatry. 2012 May.

Abstract

Objective: To examine whether self-medication with drugs confers risk of comorbid mood and drug use disorders.

Method: A longitudinal, nationally representative survey was conducted by the National Institute on Alcohol Abuse and Alcoholism. The National Epidemiologic Survey on Alcohol and Related Conditions (NESARC) assessed DSM-IV-TR psychiatric disorders, self-medication, and sociodemographic variables at 2 time points. A total of 34,653 adult, US participants completed both waves of the survey. Wave 1 was conducted between 2001 and 2002, and Wave 2 interviews took place 3 years later (2004-2005). Logistic regression and population attributable fractions were calculated to obtain estimates of the association between self-medication and incident disorders.

Results: Logistic regression analyses revealed that self-medication with drugs conferred a heightened risk of new-onset drug dependence among those with baseline mood disorders (adjusted odds ratio [AOR] = 7.65; 95% CI, 3.70-15.82; P < .001) and accounted for over 25% of incident drug dependence disorders among people with mood disorders. Among those with comorbid mood and drug use disorders at baseline, self-medication with drugs was associated with the persistence of drug abuse (AOR = 2.47; 95% CI, 1.34-4.56; P < .01), accounting for over one-fifth of the persistence of drug use disorders at 3-year follow-up.

Conclusions: Self-medication with drugs among individuals with mood disorders confers substantial risk of developing incident drug dependence and is associated with the persistence of comorbid mood and drug use disorders. These results clarify a pathway that may lead to the development of mood and drug use disorder comorbidity and indicate an at-risk population, with potential points of intervention for prevention of comorbidity.

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Figures

Figure 1
Figure 1
The types of drugs used at Wave 1 and the categories of drug dependence at Wave 2 among individuals with baseline mood disorders who endorsed self-medication at Wave 1 and subsequently developed drug dependence at Wave 2 (n=25).
See this image and copyright information in PMC

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