Early-onset dysphagia predicts short survival in multiple system atrophy

Area of Science:

• Neurology
• Clinical Medicine
• Degenerative Diseases

Background:

• Prognostic impact of dysphagia in multiple system atrophy (MSA) is debated.
• Investigating dysphagia severity and survival in MSA is crucial.
• Differentiating impact between MSA subtypes (MSA-C and MSA-P) is needed.

Purpose of the Study:

• To determine the relationship between dysphagia severity and survival in MSA.
• To assess if dysphagia's impact on survival differs between MSA-C and MSA-P.
• To identify dysphagia as a prognostic factor in MSA.

Main Methods:

• Retrospective analysis of 297 MSA patients (MSA-C: 171, MSA-P: 126).
• Evaluation of symptomatic dysphagia within 3 years of onset using Hyodo score via FEES.
• Survival analysis using log-rank and Cox proportional hazards models.

Main Results:

• Symptomatic dysphagia within 3 years of onset was associated with shorter survival (4.2 vs. 7.3 years).
• Dysphagia within 3 years independently predicted shorter survival in multivariate analysis.
• Hyodo score correlated with survival in both MSA-C and MSA-P, despite higher scores in MSA-P.

Conclusions:

• Early symptomatic dysphagia (within 3 years) is a significant predictor of reduced survival in MSA.
• Dysphagia severity, assessed by Hyodo score, impacts survival in both MSA-C and MSA-P.
• Findings highlight dysphagia as a critical prognostic marker in MSA management.