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Volume 352:2515-2523 June 16, 2005 Number 24
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Prevalence and Treatment of Mental Disorders, 1990 to 2003
Ronald C. Kessler, Ph.D., Olga Demler, M.A., M.S., Richard G. Frank, Ph.D., Mark Olfson, M.D., Harold Alan Pincus, M.D., Ellen E. Walters, M.S., Philip Wang, M.D., Dr.P.H., Kenneth B. Wells, M.D., and Alan M. Zaslavsky, Ph.D.

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ABSTRACT

Background Although the 1990s saw enormous change in the mental health care system in the United States, little is known about changes in the prevalence or rate of treatment of mental disorders.

Methods We examined trends in the prevalence and rate of treatment of mental disorders among people 18 to 54 years of age during roughly the past decade. Data from the National Comorbidity Survey (NCS) were obtained in 5388 face-to-face household interviews conducted between 1990 and 1992, and data from the NCS Replication were obtained in 4319 interviews conducted between 2001 and 2003. Anxiety disorders, mood disorders, and substance-abuse disorders that were present during the 12 months before the interview were diagnosed with the use of the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders, fourth edition (DSM-IV). Treatment for emotional disorders was categorized according to the sector of mental health services: psychiatry services, other mental health services, general medical services, human services, and complementary–alternative medical services.

Results The prevalence of mental disorders did not change during the decade (29.4 percent between 1990 and 1992 and 30.5 percent between 2001 and 2003, P=0.52), but the rate of treatment increased. Among patients with a disorder, 20.3 percent received treatment between 1990 and 1992 and 32.9 percent received treatment between 2001 and 2003 (P<0.001). Overall, 12.2 percent of the population 18 to 54 years of age received treatment for emotional disorders between 1990 and 1992 and 20.1 percent between 2001 and 2003 (P<0.001). Only about half those who received treatment had disorders that met diagnostic criteria for a mental disorder. Significant increases in the rate of treatment (49.0 percent between 1990 and 1992 and 49.9 percent between 2001 and 2003) were limited to the sectors of general medical services (2.59 times as high in 2001 to 2003 as in 1990 to 1992), psychiatry services (2.17 times as high), and other mental health services (1.59 times as high) and were independent of the severity of the disorder and of the sociodemographic characteristics of the respondents.

Conclusions Despite an increase in the rate of treatment, most patients with a mental disorder did not receive treatment. Continued efforts are needed to obtain data on the effectiveness of treatment in order to increase the use of effective treatments.


Source Information

From the Department of Health Care Policy, Harvard Medical School, Boston (R.C.K., O.D., R.G.F., E.E.W., P.W., A.M.Z.); the New York State Psychiatric Institute and the Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York (M.O.); RAND and the Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh (H.A.P.); the Division of Pharmacoepidemiology and Pharmacoeconomics, Brigham and Women's Hospital and Harvard Medical School, Boston (P.W.); and the Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles (K.B.W.).

Address reprint requests to Dr. Kessler at the Department of Health Care Policy, Harvard Medical School, 180 Longwood Ave., Boston, MA 02115, or at kessler{at}hcp.med.harvard.edu.

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Related Letters:

Prevalence and Treatment of Mental Disorders
MacKenzie T. D., Kolpak S. J., Mehler P. S., Kessler R. C., Wang P., Zaslavsky A. M.
Extract | Full Text | PDF  
N Engl J Med 2005; 353:1184, Sep 15, 2005. Correspondence

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