Psychometric properties of the Turkish Version of the Brief Quality of Life in Bipolar Disorder (Brief QoL.BD) Scale

Özet

Objectives: The aim of this study was to determine the reliability and validity of the Turkish version of the Brief Qualityof Life in Bipolar Disorder Scale [QoL.BD].Methods: Conducted using a methodological and identifying design, this study included 76 patients who had beendiagnosed with bipolar disorder and from whom the data was obtained in 2013. Patients from the mood disorderscenters of two different psychiatry clinics constituted the population of the study. The Turkish version of the Brief QoL.BD was assessed in terms of language, content, and structure in the sample of 76 patients diagnosed with bipolar disorder. Lawshe’s methods were used to assess content validity; exploratory factor analysis was used to determine latentstructure; and Cronbach’s internal consistency coefficient was used to test internal reliability.Results: The study included 76 patients diagnosed as bipolar I and II. Content validity of the 12-item scale was foundto be strong (Lawshe index =.82), as was the internal reliability of the scale [alpha =.86]. Factorability of the correlationmatrix was confirmed, and a single factor extraction was suggested on the basis of the scree plot and Velicer’s minimumaverage partial test. This single factor explained 36.05% of the variance, with all items having positive loadings and sixitems having factor loadings >.3.Conclusion: The Turkish version of the Brief QoL.BD was concluded to have adequate internal reliability and validity forassessing disorder-specific quality of life in euthymic patients with bipolar disorders.