Current epidemiology of comorbidity of psychiatric and addictive disorders.

Some major epidemiologic studies have assumed that treatment of the psychiatric symptoms will result in a lowered morbidity and mortality from the addictive disorders or, more specifically, that the addictive disorders are dependent on the psychiatric disorders and etiologically linked to them as an effect or secondary consequence. There is little systematic evidence beyond anecdotal and intuitive supposition to support this popular and only hypothetic position. The consequence is that to insist on the priority of the psychiatric disorder in diagnosis and treatment is to perpetuate artifactual prevalence rates for psychiatric comorbidity in addictive disorders, and to preclude the definitive treatment to reduce the psychiatric morbidity and mortality caused by addictive disorders.