REM sleep behaviour disorder in Parkinson's disease: a questionnaire-based study

Area of Science:

• Neurology
• Sleep Medicine
• Movement Disorders

Background:

• Parkinson's disease (PD) is a neurodegenerative disorder affecting movement.
• REM sleep behaviour disorder (RBD) is characterized by loss of muscle atonia during REM sleep.
• The clinical frequency and features of RBD in PD patients require further investigation.

Purpose of the Study:

• To determine the clinical frequency and characteristics of RBD in a large Parkinson's disease cohort.
• To identify factors associated with RBD in PD patients.
• To assess the risk of injury associated with RBD in PD.

Main Methods:

• A cohort of 200 Parkinson's disease patients was evaluated by six neurologists.
• A semi-structured questionnaire based on International Classification of Sleep Disorders-Revised (ICSD-R) criteria for RBD was used.
• Demographic and PD clinical features were compared between patients with and without RBD.

Main Results:

• Out of 195 evaluated PD patients, 66 (31.8%) met the criteria for RBD.
• Common RBD features included upper limb movements (87%), lower limb movements (79%), and vocalizations (85%).
• RBD was associated with male gender, older age, and longer PD duration; 69% of RBD patients reported sleep-related injuries.

Conclusions:

• RBD is a common condition in Parkinson's disease patients, with significant associated injuries.
• Screening for RBD symptoms in PD patients, especially those with long disease duration, is highly recommended.
• Neurologists can effectively diagnose RBD in PD patients using standardized questionnaires and brief training.