J Korean Neuropsychiatr Assoc.
2005 Sep;44(5):583-590.
A Validation Study of the Korean Version Mood Disorder Questionnaire(K-MDQ)
- Affiliations
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- 1Department of Neuropsychiatry, Ilsan Hospital, National Health Insurance Corporation, Koyang, Korea.
- 2Naju National Hospital, Naju, Korea.
- 3Department of Psychiatry, Soonchunhyang Buchcheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea.
- 4Department of Psychiatry, Seoul National University College of Medicine, Seoul, Korea.
- 5Department of Psychiatry, Kangbuk Samsung Hospital, School of Medicine, Sungkyunkwan University, Seoul, Korea.
- 6Department of Psychiatry, College of Medicine, Catholic University, Seoul, Korea.
Abstract
OBJECTIVES
This study aims to test the validity of the Korean version of Mood Disorder Questionnaire (K-MDQ), a screening instrument for bipolar disorder.
METHODS
A total of 238 subjects (126 DSM-IV bipolar outpatients and 112 controls without psychiatric history) completed the K-MDQ.
RESULTS
The Cronbach's alpha, used to measure the internal consistency of the scale, was high (0.88). Principal component analysis with varimax rotation revealed three factors, which explained 59.5% of the variance. Individual item correlations with the total score were all statistically significant (p<0.001). The mean total score of the K-MDQ was 8.48 in bipolar disorder and 4.51 in non-clinical participants. A total K-MDQ score of 7 or more excluding further two questions was chosen as the optimal cutoff, as it provided good sensitivity (0.75) and specificity (0.69).
CONCLUSION
The results of this study showed adequate validity of the K-MDQ, suggesting that this instrument is useful for screening of bipolar disorder.
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