Relation between Voice Handicap Index (VHI) and disease severity in Iranian patients with Parkinson's disease


BACKGROUND One third of patients with Parkinson's disease (PD) have mentioned "dysphonia" as their most debilitating communication deficit. Patient-based measurements, such as Voice Handicap Index (VHI) add necessary supplementary information to clinical and physiological assessment. There are a few studies about relation between VHI and disease severity in… (More)


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