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Bipolar Spektrumu Tanı Ölçeği Türkçe Formu’nun Güvenilirlik ve Geçerlilik Çalışması

Bahri İNCE, Alparslan CANSIZ, Sevinç ULUSOY, Kasım Fatih YAVUZ, Erhan KURT, Kürşat ALTINBAŞ
2019; 30(4): 272-278
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SUMMARY
Reliability and Validity Study of the Turkish Version of Bipolar Spectrum Diagnostic Scale

Objective: The purpose of this study is to evaluate the reliability and
validity of the Turkish Version of the Bipolar Spectrum Diagnostic Scale
(BSDS).
Method: The study was carried out with 130 patients diagnosed with
bipolar I disorder, 15 patients diagnosed with bipolar II disorder, and
38 patients diagnosed with major depressive disorder attending the
outpatient psychiatry departments of the Bakırköy Prof. Dr. Mazhar
Osman Training and Research Hospital for Mental Health and
Neurological Diseases. The Mood Disorder Questionnaire (MDQ) was
used for convergent validity. The internal consistency coefficient, itemtotal
score correlation coefficients, test-retest correlation coefficient,
confirmatory factor analysis, correlation with concurrent scale, and
ROC curve were statistically calculated.
Results: Confirmatory factor analysis indicated that the 20-item version
did not show adequate goodness-of-fit. The item 4 with a relatively
low regression weight was removed from the model. For the 19-item
revised and corrected model, the observed goodness-of-fit indexes were
RMSEA = 0.040, CFI = 0.900, GFI = 0.890, IFI = 0.900 and χ2/df =
1.230. The internal consistency Cronbach’s alpha coefficient was 0.831.
The correlation coefficient between the Turkish version of the BSDS
and the MDQ was 0.54. The cutoff point of the scale calculated by
the ROC analysis was 12 with a sensitivity of 78.6% and a specificity
of 86.8%.
Conclusion: The Turkish Version of the BSDS, has been shown to be
reliable and valid tool for screening bipolar disorder after removal of the
item 4 of the original version of the scale.
Key Words: Bipolar disorder, screening test, reliability, validity