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Validation of Parkinson’s Disease Sleep Scale-2 in Lithuanian patients
Date Issued |
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2017-12-01 |
eISSN 1648-9144.
Background and Aim: Sleep disturbances and nocturnal disabilities play an important part of non-motor symptoms in Parkinson’s disease (PD). Parkinson’s Disease Sleep Scale -2 (PDSS-2) assess a wide spectrum of disease specific sleep problems and is easy to administer as a patient self-rating scale. The aim of this study is to translate and culturally adapt PDSS-2 for Lithuanian PD population. Materials and Methods: This study was carried out at the Department of Neurology, Hospital of Lithuanian University of Health Sciences. The study consisted of two parts: evaluation of both PDSS-2 Lithuanian translations by PD patients and interviews regarding any issues on Lithuanian version of PDSS-2. Patient inclusion criteria were PD diagnosis, age above 18yo. Exclusion criteria were non-native Lithuanian speaker and patients diagnosed with dementia. PDSS-2 was translated into Lithuanian by two independent professional translators. After first part of the study our group drew a conclusion to validate and back-translate patients’ preferred Lithuanian translation of PDSS-2. Multidisciplinary team included two professional forward translators (from English into Lithuanian), one backward translator (Lithuanian into English), primary investigator and study supervisor. Results: 41 patients with PD completed the PDSS-2, and their mean score was 21 out of 60. The score was equal or greater than the cut-off value of 15, indicating poor sleep, in 27 patients (65.5%). 35 patients of PD answered both forward translations. B translation was preferred over A translation (25.7% vs. 20%; p>0.05. 54.3% of respondents preferred both Lithuanian translations equally or refrained from answering). Patients prioritized ‘drebulys’ (Lithuanian translation of word ‘tremor’) over ‘tremoras’ (45.7% vs. 40%, 14.3% of patients refrained from answering). B translation was chosen for further PDSS- 2 validation for Lithuanian PD popu[...].