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    Reliability and validity of the Turkish version of Parkinson's Disease Sleep Scale
    (Asean Neurological Assoc, 2019) Say, Bahar; Tunc, Tugba; Ivan, Levent Ertugrul
    Objective: The aim of this study was to determine the reliability and validity of the Parkinson's Disease Sleep Scale (PDSS)-Turkish version. 48 patients with idiopathic Parkinson's disease and 48 healthy controls were included in this cross-sectional study. The patients' Unified Parkinson's Disease Rating Scale (UPDRS), Hoehn-Yahr Stage (HYS), and the drugs were recorded. Mini-Mental State Examination was performed in the study population. The professional translation of the PDSS (English to Turkish and Turkish to English) was done by a neurologist and a language educator who was a native English speaker and well versed in Turkish, and it was approved by a certified translation agency as well. PDSS and Epworth Sleep Scale (ESS) tests were performed to 96 subjects. PDSS was repeated 15 days later. Conclusions: The scale was found to be reliable by the first and second assessment of PDSS to 96 subjects (Cronbach's alpha= 0.721 and 0.77). Intra-class correlation coefficient (ICC) 90%, was found to be high. A statistically significant negative correlation was found between the total ESS and the total PDSS scores when tested in the 96 cases included in the study (rs = -0.306, p = 0.02; rs = -0.340 p = 0.01, respectively). PDSS was found to be reliable and valid in our study with Parkinson's patients who were monitored at our outpatient clinic.