Screening with the Korean Version of the Mood Disorder Questionnaire for Bipolar Disorders in Adolescents: Korean Validity and Reliability Study
Se-Hoon Shim 1, Jonghun Lee 2, Jye-Heon Song 3, Beomwoo Nam 4, Bo-Hyun Yoon 3, Ha-young Jin 5, Hyung-Mo Sung 6, Jong-Hyun Jeong 7, Sae-Heon Jang 8, Duk-In Jon 9, Young Sup Woo 7, Won-Myong Bahk 7*
1Department of Psychiatry, Soonchunhyang University Cheonan Hospital, Soonchunhyang University, Cheonan, Korea, 2Department of Psychiatry, College of Medicine, The Catholic University of Daegu, Daegu, Korea, 3Department of Psychiatry, Naju National Hospital, Naju, Korea, 4Department of Psychiatry, School of Medicine, Konkuk University, Chungju, Korea , 5Department of Psychology Chungbuk National University, Cheongju, Korea, 6Department of psychiatry, School of Medicine, CHA University, Kumi, Korea, 7Department of Psychiatry, College of Medicine, The Catholic University of Korea, Seoul, Korea, 8Department of Psychiatry, Bongseng Memorial Hospital, Busan, Korea, 9Department of Psychiatry, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
Received: August 4, 2017; Revised: August 25, 2017; Accepted: August 25, 2017; Published online: August 25, 2017.
© The Korean College of Neuropsychopharmacology. All rights reserved.

Abstract
Objective: This study aimed to evaluate the validity and reliability of a Korean version of the Mood Disorder Questionnaire-Adolescent Version (K-MDQ-A) as a screening instrument for bipolar disorders in adolescents.
Methods: One hundred two adolescents with bipolar disorders and their parents were recruited from November 2014 to November 2016 at 7 training hospitals. One hundred six controls were recruited from each middle school in 2 cities of south Korea. The parent version of the original MDQ-A was translated into Korean. The parents of all participants completed the K-MDQ-A. The diagnoses of bipolar disorders were determined based on the Korean version of K-SADS-PL. The test-retest reliability with a 10-month interval was investigated in 33 bipolar adolescents.
Results: K-MDQ-A yielded a sensitivity of 0.90 and a specificity of 0.92 when using a cut-off score of endorsement of 5 items, indicating that symptoms occurred in the same time period and caused moderate or serious problems. The internal consistency of the K-MDQ-A was good. The correlations between each item and the total score ranged from 0.40 to 0.76 and were all statistically significant. Factor analysis revealed 3 factors that explained 61.25% of the total variance. The mean total score was significantly higher in bipolar adolescents (7.29) than in controls (1.32). The Pearson correlation coefficient for the total test-retest score was 0.59(P < .001).
Conclusion: The K-MDQ-A completed by parents showed the excellent validity and reliability and may be a useful screening tool for adolescents with bipolar disorders attending in- and outpatient psychiatric clinics.
Keywords: Adolescent, Bipolar, Mood Disorder Questionnaire, Reliability and validity, Screening


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