alexa Prevalence, severity, and comorbidity of 12-month DSM-IV disorders in the National Comorbidity Survey Replication.

Author(s): Kessler RC, Chiu WT, Demler O, Merikangas KR, Walters EE

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Abstract BACKGROUND: Little is known about the general population prevalence or severity of DSM-IV mental disorders. OBJECTIVE: To estimate 12-month prevalence, severity, and comorbidity of DSM-IV anxiety, mood, impulse control, and substance disorders in the recently completed US National Comorbidity Survey Replication. DESIGN AND SETTING: Nationally representative face-to-face household survey conducted between February 2001 and April 2003 using a fully structured diagnostic interview, the World Health Organization World Mental Health Survey Initiative version of the Composite International Diagnostic Interview. PARTICIPANTS: Nine thousand two hundred eighty-two English-speaking respondents 18 years and older. MAIN OUTCOME MEASURES: Twelve-month DSM-IV disorders. RESULTS: Twelve-month prevalence estimates were anxiety, 18.1\%; mood, 9.5\%; impulse control, 8.9\%; substance, 3.8\%; and any disorder, 26.2\%. Of 12-month cases, 22.3\% were classified as serious; 37.3\%, moderate; and 40.4\%, mild. Fifty-five percent carried only a single diagnosis; 22\%, 2 diagnoses; and 23\%, 3 or more diagnoses. Latent class analysis detected 7 multivariate disorder classes, including 3 highly comorbid classes representing 7\% of the population. CONCLUSION: Although mental disorders are widespread, serious cases are concentrated among a relatively small proportion of cases with high comorbidity.
This article was published in Arch Gen Psychiatry and referenced in

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