Prevalence of DSM-IV major mental disorders among Korean adults: A 2006 National Epidemiologic Survey (KECA-R).

Objectives: The aim of this study was to estimate the prevalence of the DSM-IV major mental disorders in the Korean population using the Korean version of Composite International Diagnostic Interview (K-CIDI).

Methods: The Korean Epidemiologic Catchment Area study Replication (KECA-R) was conducted between August 2006 and April 2007. The sampling of the subjects was carried out across 12 catchment areas using a multistage, cluster sampling design. The target population included all eligible community dwelling residents aged 18-64 years. Face-to-face interviews were conducted using the K-CIDI based on the DSM-IV.

Results: A total of 6510 participants completed the interview (response rate=81.7%). The lifetime and 12-month prevalence rates for DSM-IV major mental disorders were 29.0% and 16.9%, respectively. Those of specific disorders were as follows: (1) alcohol use disorder, 16.2% and 5.6%; (2) nicotine use disorder, 9.0% and 6.0%; (3) specific phobia, 3.8% and 3.4%; (4) major depressive disorder, 5.6% and 2.5%; and (5) generalized anxiety disorder, 1.6% and 0.8%. Additionally, data related to nicotine and alcohol use disorder revealed a very high male to female ratio. Further, mood and anxiety disorders were more prevalent in females than in males.

Conclusion: The prevalence of major mental disorders was high. In comparison with the studies performed in other countries, notable differences were observed with respect to the distribution of mental disorders in Korea.