Reliability and Validity Study of the Turkish Version of Bipolar Prodrome Symptom Scale

Objective: In this study, it is aimed to evaluate the reliability and validity of the Turkish version of Bipolar Prodrome Symptom Scale. Method: The study was carried out with subjects who participated the study on the epidemiology of bipolar disorder among the students in the 1st grade of Celal Bayar University. The sample consisted of 30 volunteers diagnosed as bipolar disorder and 122 healthy controls. For concurrent validity, Hypomania Checklist-32-Revised was used. In the statistical analysis, internal consistency coefficient, item-total score correlation coefficients, exploratory factor analysis, correlation with concurrent scale and ROC curve were calculated. Results: Translation into Turkish and back-translation into English of were performed and thus the semantic harmony of the scale was obtained. In the internal consistency, Cronbach alpha coefficient was between 0,969-0,979 and item-total score correlations were between 0,767-0,929 and 0,725-0,890. In factor analysis, for the severity subscale a one-factor solution representing 78,9% of the variance and for the frequency subscale one-factor solution representing 71,7% of the solution are obtained. Correlation of Bipolar Prodrome Symptom Scale with Hypomania Checklist-32-Revised was r=0,513 and 0,530. In the ROC analysis, area under the curve was 0,977 and 0,999. The scale discriminates well between the bipolar group and healthy control group. Conclusion: Bipolar Prodrome Symptom Scale developed for screening hypomania is reported to be reliable and valid in Turkish.