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Sleep Quality and Cognitive Impairment in Patients with Parkinsonís Disease in Iran [Turk J Neurol]
Turk J Neurol. 2016; 22(3): 121-126 | DOI: 10.4274/tnd.84755  

Sleep Quality and Cognitive Impairment in Patients with Parkinsonís Disease in Iran

Narges Sahebzadeh1, Morteza Mazloum Farsi Baf1, Seyed Mehran Homam2
1Islamic Azad University Faculty of Medicine, Mashhad Branch, Mashhad, Iran
2Islamic Azad University Faculty of Medicine, Mashhad Branch, Department of Neurology, Mashhad, Iran

Objective: To evaluate the cognitive status and sleep quality and their association in patients with Parkinsonís disease (PD).
Materials and Methods: In this analytical cross-sectional study, 120 patients with PD were selected from 22-Bahman and 17-Shahrivar hospitals. Demographic information was recorded on a form and Parkinsonís severity was determined using the Hoehn and Yahr scale (HY). Pittsburgh Sleep Quality Index (PSQI) and Epworth sleepiness scale (ESS) were used for the assessment of sleep quality and excessive daytime sleepiness, respectively. Cognitive status was assessed using the
Montreal Cognitive Assessment questionnaire.
Results: The mean age of patients with PD was 65.9Ī11.7 years, and 67.5% were men. Cognitive impairment was found in 113 (94.2%) patients, poor sleep quality in 87 (72.5%), and excessive daytime sleepiness in 27 (22.5%) patients. The mean PSQI and ESS scores were 9.03Ī4.70 and 7.38Ī3.73, respectively. There was a significant association between cognitive status and sleep quality, as well as daytime sleepiness (independent sample t-test, p<0.0001 for both).
Conclusion: There is a significant association between cognitive impairment and poor sleep quality as well as excessive daytime sleepiness.

Keywords: Cognitive disorders, Parkinson disease, sleep disorders


Narges Sahebzadeh, Morteza Mazloum Farsi Baf, Seyed Mehran Homam. Sleep Quality and Cognitive Impairment in Patients with Parkinsonís Disease in Iran. Turk J Neurol. 2016; 22(3): 121-126

Corresponding Author: Seyed Mehran Homam, Iran


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