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Parkinson’s Disease
Volume 2015, Article ID 674796, 7 pages
Research Article

Validation of the Official Slovak Version of the Unified Dyskinesia Rating Scale (UDysRS)

1Department of Neurology, Safarik University, 04001 Kosice, Slovakia
2Department of Neurology, University Hospital of L. Pasteur, 04001 Kosice, Slovakia
32nd Department of Neurology, Faculty of Medicine, Comenius University, 83305 Bratislava, Slovakia
4Department of Neurology, Comenius University, 03659 Martin, Slovakia
5Department of Neurology, Slovak Medical University, 83303 Bratislava, Slovakia
6Department of Neurology, Zvolen Hospital, 96001 Zvolen, Slovakia
7Department of Neurology, VNsP Levoca, 05401 Levoca, Slovakia
8Institute of Normal and Pathological Physiology, Slovak Academy of Sciences, 81371 Bratislava, Slovakia

Received 23 February 2015; Accepted 23 June 2015

Academic Editor: Hélio Teive

Copyright © 2015 Matej Skorvanek et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


After successful clinimetric testing of the Unified Dyskinesia Rating Scale (UDysRS), a program for translation and validation of non-English versions of the UDysRS was initiated. The aim of this study was to validate and confirm the factor structure of the Slovak translation of the UDysRS. We examined 251 patients with Parkinson’s disease and dyskinesia using the Slovak version of the UDysRS. The average age of our sample was 65.2 ± 9.2 years and average disease duration was 10.9 ± 5.0 years. Slovak data were compared using confirmatory factor analysis with the Spanish data. To be designated as the official Slovak UDysRS translation, the comparative fit index (CFI) had to be 0.90 relative to the Spanish language version. Exploratory factor analysis was performed to explore the underlying factor structure without the constraint of a prespecified factor structure. For all four parts of the Slovak UDysRS, the CFI, in comparison with the Spanish language factor structure, was 0.98. Isolated differences in the factor structure of the Slovak UDysRS were identified by exploratory factor analysis compared with the Spanish version. The Slovak version of the UDysRS was designated as an official non-English translation and can be downloaded from the website of the International Parkinson and Movement Disorder Society.