Prevalence of bipolar spectrum disorder in Korean college students according to the K-MDQ.

Background: The purpose of this study was to assess the prevalence of bipolar spectrum disorder (BSD) in the general Korean population.

Methods: A sample of college students (n = 1026) was stratified to reflect geographical differences accurately in Korean college students. The Korean version of the Mood Disorder Questionnaire (K-MDQ) was administered and an epidemiological survey carried out between November 2006 and February 2007.