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. 2017 Nov 16;5(1):54-59.
doi: 10.1002/mdc3.12556. eCollection 2018 Jan-Feb.

Turkish Standardization of Movement Disorders Society Unified Parkinson's Disease Rating Scale and Unified Dyskinesia Rating Scale

Muhittin C Akbostanci  1   2 , Ece Bayram  2 , Volkan Yilmaz  1 , Sefer Rzayev  1 , Serhat Özkan  3 , Ayse Bora Tokcaer  4 , Esen Saka  5 , Fatma N Durmaz Celik  3 , Banu Özen Barut  6 , Zeynep Tüfekcioglu  7 , Ahmet Acarer  8 , Hatice Balaban  9 , Sevda Erer  10 , Okan Dogu  11 , Seda Kibaroglu  12 , Nursel Aydin  1 , Hasmet Hanagasi  7 , Bülent Elibol  5 , Murat Emre  7 , Glenn T Stebbins  13 , Christopher G Goetz  13
Affiliations

Turkish Standardization of Movement Disorders Society Unified Parkinson's Disease Rating Scale and Unified Dyskinesia Rating Scale

Muhittin C Akbostanci et al. Mov Disord Clin Pract. .

Abstract

Background: Movement Disorders Society Unified Parkinson's Disease Rating Scale (MDS-UPDRS) and Unified Dyskinesia Rating Scale (UDysRS) were developed as standard tools to rate Parkinson's disease (PD) and drug-induced dyskinesias of PD. As these scales have become widely used, there is a need for translation to non-English languages. Here we present the standardization for the Turkish translations.

Methods: The scales were translated into Turkish and then back-translated to English. These back-translations were reviewed by the MDS team. After cognitive pretesting, movement disorder specialists from nine centers tested 352 patients for MDS-UPDRS, and 250 patients for UDysRS. Confirmatory factor analyses (CFAs) were used to determine if the factor structures for the reference standards could be confirmed in the Turkish data. The comparative fit indexes (CFIs) for the scales were required to be 0.90 or higher. Exploratory factor analyses (EFAs) were conducted to explore the underlying factor structure without the constraint of a pre-specified factor structure.

Results: For both scales, the CFIs were 0.94 or greater as compared to the reference standard factor structures. The factor structures were consistent with that of reference standards, although there were some differences in some areas as compared to the EFA of the reference standard dataset. This may be due to the inclusion of patients with different stages of PD and different cultural properties of raters and patients.

Conclusions: These results demonstrate that the Turkish translations of MDS-UPDRS and UDysRS have adequate clinimetric properties. They are established as the official translations and can be reliably used in Turkish speaking populations.

Keywords: Dyskinesia; Parkinson's disease; rating scale.

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Figures

Figure 1
Figure 1
The percentage of patients recruited for MDS‐UPDRS/UDysRS (the overall distribution of population) from each region in Turkey.
See this image and copyright information in PMC

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