Voice Handicap in Essential Tremor: A Comparison with Normal Controls and Parkinson’s Disease

Elan Daniel Louis & Marina Gerbin
Background: Although voice tremor is one of the most commonly-noted clinical features of essential tremor (ET), there are nearly no published data on the handicap associated with it. Methods: The Voice Handicap Index (VHI) was self-administered by participants enrolled in a research study at Columbia-University Medical Center. The VHI quantifies patients' perceptions of handicap due to voice difficulties. Data from 98 ET cases were compared to data from 100 controls and 85 patients with another...
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