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CC BY-NC-ND 4.0 · Sleep Sci
DOI: 10.1055/s-0044-1791977
Original Article

Parkinson's Disease Sleep Scale-2: The Brazilian Version's Cross-cultural Adaptation and Validation

Rogério José de Souza 
1   Program of Master's and Doctor's Degree in Rehabilitation Sciences, Universidade Estadual de Londrina, Londrina, PR, Brazil
,
Amanda dos Santos Siqueira
2   Neurofunctional Physical Therapy Research Group (GPFIN), Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
,
Luísa Vigiani Cassiano
2   Neurofunctional Physical Therapy Research Group (GPFIN), Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
,
Tais Caroline Oliveira da Silva
1   Program of Master's and Doctor's Degree in Rehabilitation Sciences, Universidade Estadual de Londrina, Londrina, PR, Brazil
,
Suhaila Mahmoud Smaili 
1   Program of Master's and Doctor's Degree in Rehabilitation Sciences, Universidade Estadual de Londrina, Londrina, PR, Brazil
2   Neurofunctional Physical Therapy Research Group (GPFIN), Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
3   Department of Physiotherapy, Universidade Estadual de Londrina, Londrina, PR, Brazil
› Author Affiliations Funding Source This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001.
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Abstract

Objective To translate, cross-culturally adapt, and validate the Brazilian version of the Parkinson's Disease Sleep Scale-2 (PDSS-2/BR).

Methods This cross-sectional study addressed 80 patients with PD, and it was organized into two phases: 1) Translation and cross-cultural adaptation, which included 30 individuals in the scale's pretest stage and 2) Validation, when 50 individuals were assessed by the PDSS-2/BR, Pittsburgh Sleep Quality Index (PSQI), Parkinson's Disease Questionnaire-39 (PDQ-39), MDS-Unified Parkinson's Disease Rating Scale (MDS-UPDRS), and Hoehn and Yahr rating scale (HY); the PDSS-2/BR was retested 7 days later. The significance level was set at 5%.

Results The participants rated the PDSS-2/BR as having more than 90% comprehension. It also showed good reliability (Cronbach's alpha = 0.782) and excellent test–retest reliability (ICCinterrater = 0.901; p = 0.570; ICCintrarater = 0.905; p = 0.116). Additionally, the scale showed good precision, with low standard error of measurement (SEMinter = 1.040; SEMintra = 0.908), and moderate to strong correlation with the PSQI, MDS-UPDRS, and PDQ-39 scales (rho = 0.46–0.74); only the HY scale showed no correlation.

Discussion The PDSS-2/BR is a reliable, precise, and valid instrument for evaluating sleep among Brazilian individuals with PD. Hence, it is expected to help researchers and clinicians improve the investigation of these symptoms, promoting early and assertive diagnoses and guiding the treatment and clinical management of this population.

Keywords

Parkinson disease - sleep - sleep quality


Publication History

Received: 15 January 2024

Accepted: 26 August 2024

Article published online:
11 March 2025

© 2025. Brazilian Sleep Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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