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Validity and Reliability of the Persian Version of Parkinson's Disease Sleep Scale-2 Publisher



Joghataei MT1, 2 ; Fereshtehnejad SM3, 4 ; Mehdizadeh M1 ; Goudarzi S5 ; Habibi SAH6 ; Meimandi M7 ; Dehmiyani A7 ; Taghizadeh G7
Authors
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Authors Affiliations
  1. 1. Department of Neurosciences, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
  2. 2. Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
  3. 3. Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society (NVS), Karolinska Institutet, Stockholm, Sweden
  4. 4. Division of Neurology, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
  5. 5. Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tehran University of Medical Science, Tehran, Iran
  6. 6. Department of Neurology, Rasoul Akram Hospital, Iran University of Medical Science, Tehran, Iran
  7. 7. Rehabilitation Research Center, Department of Occupational Therapy, School of Rehabilitation Sciences, Iran University of Medical Science, Tehran, Iran

Source: Parkinson's Disease Published:2021


Abstract

Objective. Sleep problems are nonmotor symptoms in Parkinson's disease that should be carefully evaluated for better management and treatment. Parkinson's Disease Sleep Scale (PDSS-2) is one of the most reliable tools for measuring sleep difficulties in people with Parkinson's disease. This study investigated the psychometric properties of the Persian version of PDSS-2. Methods. Four hundred and fifty-six people with Parkinson's disease with a mean age ±standard deviation of 60.7 ± 11.3 years were engaged in this study. Acceptability was assessed by floor and ceiling effects. Dimensionality was measured by exploratory factor analysis. The convergent validity of PDSS-2 with the Hospital Anxiety and Depression Scale (HADS) was assessed. Internal consistency and test-retest reliability were assessed with Cronbach's alpha and intraclass correlation coefficient (ICC), respectively. Results. No noticeable ceiling and floor effect was detected. The dimensionality analysis showed three factors. A high correlation was obtained between PDSS-2 and HADS (anxiety subscale). Excellent internal consistency with α = 0.94, and good test-retest reliability with ICC = 0.89 were obtained. Conclusion. This study showed that the Persian version of Parkinson's Disease Sleep Scale has acceptable validity and reliability for measuring sleep disturbances in people with Parkinson's disease. © 2021 Mohammad Taghi Joghataei et al.
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