Snoring is Associated with an Impaired Motor Function, Disease Severity and the Quality of Life but not with Excessive Daytime Sleepiness in Patients with Parkinson's Disease

Apr 16, 2013Internal medicine (Tokyo, Japan)

Snoring linked to worse movement, disease severity, and quality of life but not daytime sleepiness in Parkinson's patients

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Abstract

Snoring was more prevalent in patients with Parkinson's disease at 14.0% compared to 1.1% in controls.

Patients with Parkinson's disease who snored exhibited greater disease severity.
Snorers had worse scores on the motor section of the Unified Parkinson's Disease Rating Scale.
Impaired quality of life was noted in multiple domains of the Parkinson's Disease Questionnaire among snoring patients.
No significant differences in excessive daytime sleepiness were found between snorers and non-snorers.
A higher proportion of bradykinesia was observed in snoring Parkinson's patients compared to non-snorers.

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OBJECTIVE: There are conflicting results regarding the frequency and clinical significance of sleep related breathing disorders in patients with Parkinson's disease (PD). The aim of this study was to investigate the relationship between snoring and its clinical correlates in patients with PD.

METHODS: A total of 93 PD patients and 93 controls were analyzed from a previously conducted cross-sectional study. Snoring was defined as a snoring frequency of ≥ 2 days/week (a score of 2 or higher on the PD Sleep Scale-2 subitem 15). Excessive daytime sleepiness (EDS) was defined as an Epworth Sleepiness Scale score of ≥ 10.

RESULTS: Snoring was more prevalent in the patients with PD than in the controls (14.0% vs. 1.1%). The PD patients who snored exhibited greater disease severity, worse scores on the motor section of the Unified Parkinson's Disease Rating Scale (UPDRS) and the Parkinson fatigue scale and more impaired scores in several domains of the Parkinson's Disease Questionnaire, including the domains of mobility, activities of daily living, emotional well-being, communication and bodily discomfort, when compared to those who did not snore. No between-group differences were found in EDS. A higher proportion of the UPDRS motor scores for bradykinesia was seen in the PD patients who snored compared to that observed in the PD patients who did not snore.

CONCLUSION: We found that snoring was more frequent in PD patients than in controls. Furthermore, snoring in PD patients was associated with disease severity, an impaired motor function and a decreased quality of life, although it was not associated with EDS.

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Snoring is Associated with an Impaired Motor Function, Disease Severity and the Quality of Life but not with Excessive Daytime Sleepiness in Patients with Parkinson's Disease

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