The association between saliva control, silent saliva penetration, aspiration, and videofluoroscopic findings in Parkinson's disease patients.

Background: Dysphagia is a common disorder among patients with Parkinson's disease (PD). It occurs in up to 80% of all (PD) patients during the early stages of the disease and up to 95% in the advanced stages; but professionals may not hear from the patients about dysphagia symptoms until these symptoms reach an advanced stage and lead to medical complications.

Materials And Methods: Thirty-three PD patients (mean age 66.