Excessive daytime sleepiness is associated to the development of swallowing impairment in a cohort of early stage drug naïve Parkinson's disease patients

Objective The aim of the present study was to investigate the potential predictors of subjectively reported swallowing impairment in a cohort of early-stage and drug naïve Parkinson's disease patients. Methods A retrospective analysis of the Parkinson Progression Markers Initiative (PPMI) data was conducted. PD patients with score ≥ 1 on MDS-UPDRS “item 2.3” and on SCOPA-AUT “question 1” were classified as “dysphagic” and were compared with...