The relationship between obstructive sleep apnea and visual hallucinations in PD patients: a polysomnography study

Area of Science:

• Neurology
• Sleep Medicine
• Ophthalmology

Background:

• Parkinson's disease (PD) is a neurodegenerative disorder.
• Visual hallucinations (VHs) and obstructive sleep apnea (OSA) are common comorbidities in PD.
• Understanding the interplay between VHs and OSA in PD is crucial for patient management.

Purpose of the Study:

• To determine the prevalence of VHs and OSA in Chinese PD patients.
• To explore the clinical characteristics associated with VHs and OSA in this population.
• To investigate the relationship between VHs and OSA severity.

Main Methods:

• A cohort of 489 Chinese PD patients was studied.
• Patients were classified based on VHs presence and severity (minor VHs, formed VHs) using UPDRS and questionnaires.
• Polysomnography (PSG) was performed for objective sleep assessment, including apnea-hypopnea index (AHI).

Main Results:

• VHs were present in 29.2% of PD patients.
• OSA prevalence increased with VH severity (38.7% in non-hallucinators to 63.3% in formed VHs).
• VHs were associated with longer disease duration, higher UPDRS scores, and poorer sleep quality, with AHI, N1%, respiratory-related arousal, and lowest O2 independently linked to VHs.

Conclusions:

• This study confirms a high prevalence of VHs and OSA in Chinese PD patients.
• A significant association exists between VHs and OSA severity in PD.
• Findings highlight the importance of screening for OSA in PD patients experiencing VHs.