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Article type: Research Article
Authors: Horváth, Krisztina | Aschermann, Zsuzsanna | Ács, Péter | Deli, Gabriella | Janszky, József | Karádi, Kázmér | Komoly, Sámuel | Faludi, Béla | Kovács, Norbert
Affiliations: Doctoral School of Clinical Neuroscience, University of Pécs, Pécs, Hungary | Department of Neurology, University of Pécs, Pécs, Hungary
Note: [] Correspondence to: Dr. Kovacs Norbert, Department of Neurology, University of Pécs, 7633, Pécs, Rét utca 2, Hungary. Tel.: +36 70 222 1178; Fax: +36 72 535 911; E-mail: [email protected]
Abstract: Background and aims: The aim of the present study was to measure the test-retest validity of Parkinson's Disease Sleep Scale 2nd version (PDSS-2) on PD patients with stable medication and motor symptoms over the period of 4 weeks. Methods: The subject population consisted of 92 PD patients. Besides PDSS-2, Unified PD rating scale, Montgomery-Asberg Depression Rating Scale and EQ-5D were assessed at baseline and 4 weeks later. Results: The total score of PDSS-2 decreased from 19.06 ± 10.78 points to 18.00 ± 9.34 points (p > 0.05). For the total score of PDSS-2 the Intra-class and Lin's Concordance Correlation Coefficients were 0.782 and 0.799. The average difference between the baseline and follow-up total PDSS-2 scores was −1.06 points with the 95% confidence interval of −7.96 and +5.84 points. Conclusions: Our data supports that the items and the total score of PDSS-2 have acceptable test-retest reliability over a four week period on patients with stable PD symptoms and pharmacological therapy.
Keywords: Sleep, scale, concordance, intraclass correlation coefficient
DOI: 10.3233/JPD-140459
Journal: Journal of Parkinson's Disease, vol. 4, no. 4, pp. 687-691, 2014
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