Volume 36, Issue 12 p. 2821-2832
Research Article

Longitudinal Changes in Parkinson's Disease Symptoms with and Without Rapid Eye Movement Sleep Behavior Disorder: The Oxford Discovery Cohort Study

Yaping Liu MD, PhD

Yaping Liu MD, PhD

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

Li Chiu Kong Family Sleep Assessment Unit, Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China

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Michael A. Lawton MPhil

Michael A. Lawton MPhil

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom

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Christine Lo DPhil, MRCP

Christine Lo DPhil, MRCP

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom

Department of Neurology, Royal Hallamshire Hospital, Sheffield, United Kingdom

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Francesca Bowring M.Sc

Francesca Bowring M.Sc

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

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Johannes C. Klein MD, PhD

Johannes C. Klein MD, PhD

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom

Department of Neurology, John Radcliffe Hospital, Oxford, United Kingdom

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Agustin Querejeta-Coma MD

Agustin Querejeta-Coma MD

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom

Department of Neurology, John Radcliffe Hospital, Oxford, United Kingdom

Department of Neurology, Infanta Elena University Hospital, Valdemoro, Spain

Department of Neurology, Rey Juan Carlos University Hospital, Móstoles, Spain

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Sangeeta Scotton MBBS, MRCP

Sangeeta Scotton MBBS, MRCP

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

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Jessica Welch M.Sc

Jessica Welch M.Sc

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

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Jamil Razzaque M.Sc

Jamil Razzaque M.Sc

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

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Thomas Barber DPhil, MRCP

Thomas Barber DPhil, MRCP

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom

Department of Neurology, John Radcliffe Hospital, Oxford, United Kingdom

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Yoav Ben-Shlomo PhD, MRCP

Yoav Ben-Shlomo PhD, MRCP

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom

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Michele T. Hu PhD, FRCP

Corresponding Author

Michele T. Hu PhD, FRCP

Oxford Parkinson's Disease Centre, University of Oxford, Oxford, United Kingdom

Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom

Department of Neurology, John Radcliffe Hospital, Oxford, United Kingdom

Correspondence to: Dr. Michele T. Hu, Department of Neurology, Level 3, West Wing, John Radcliffe Hospital, Headley Way, Oxford OX3 9DU, UK; E-mail: [email protected]

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First published: 26 August 2021
Citations: 15

Relevant conflicts of interest/financial disclosures: Nothing to report.

Full financial disclosures and author roles may be found in the online version of this article.

Abstract

Background

Parkinson's disease (PD) comorbid with rapid eye movement sleep behavior disorder (RBD) may show more severe motor and nonmotor symptoms, suggesting a distinct PD subtype.

Objective

The aim of this study was to investigate the impact of RBD on the longitudinal change of motor and nonmotor symptoms in patients with PD.

Methods

Patients with early PD (diagnosed within 3.5 years) recruited from 2010 to 2019 were followed every 18 months in the Oxford Parkinson's Disease Centre Discovery cohort. At each visit, we used standard questionnaires and measurements to assess demographic features and motor and nonmotor symptoms (including RBD, daytime sleepiness, mood, autonomic symptoms, cognition, and olfaction). Data were analyzed with linear mixed effects and Cox regression models. Possible RBD (pRBD) was longitudinally determined according to RBD Screening Questionnaire scores.

Results

A total of 923 patients were recruited (mean age: 67.1 ± 9.59 years; 35.9% female), and 788 had follow-up assessment(s) (mean: 4.8 ± 1.98 years, range: 1.3–8.3). Among them, 33.3% were identified as pRBD (PD + pRBD). Patients with PD + pRBD had more severe baseline symptoms and showed faster progression on Movement Disorder Society-Unified Parkinson's Disease Rating Scale parts I and III, Purdue Pegboard test, and Beck Depression Inventory scores. Moreover, PD + pRBD was associated with an increased level of risk for mild cognitive impairment (hazard ratio [HR] = 1.36, 95% confidence interval [CI]: 1.01–1.83), freezing of gait (HR = 1.42, 95% CI: 1.10–1.86), and frequent falling (HR = 1.62, 95% CI: 1.02–2.60).

Conclusions

Patients with PD + pRBD progress faster on motor, mood, and cognitive symptoms, confirming a more aggressive PD subtype that can be identified at baseline and has major clinical implications. © 2021 International Parkinson and Movement Disorder Society

Data Availability Statement

The data that support the findings of this study are available on request from the Oxford Parkinson's Disease Centre Data Access Committee.