Abstract
<strong>Background:</strong> 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. <strong>Methods:</strong> 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 with data from 100 controls and 85 patients with another movement disorder (Parkinson’s disease, PD). <strong>Results:</strong> Voice tremor was present on examination in 25 (25.5%) ET cases; 12 had mild voice tremor (ET<sub>Mild VT</sub>) and 13 had marked voice tremor (ET<sub>Marked VT</sub>). VHI scores were higher in ET cases than controls (p=0.02). VHI scores among ET<sub>Marked VT</sub> were similar to those of PD cases; both were significantly higher than controls (pMarked VT, with values that were similar to those observed in PD. <strong>Discussion:</strong> The voice handicap associated with ET had multiple (i.e., physical, functional, and emotional) dimensions. Moreover, ET cases with marked voice tremor on examination had a level of self-reported voice handicap that was similar to that observed in patients with PD.
Highlights
A common feature of many movement disorders is that, through a variety of mechanisms, they may involve the voice, thereby producing a range of problems for those with the disease, and affecting the ability to communicate
Among essential tremor (ET) cases and PD cases, there was a correlation between Voice Handicap Index (VHI) scores and CESD-10 scores (Spearman’s r50.34 [p,0.001], and Spearman’s r50.40 [p,0.001], respectively)
The voice handicap that was associated with ET was multi- rather than unidimensional, including physical, functional, and emotional aspects
Summary
A common feature of many movement disorders is that, through a variety of mechanisms, they may involve the voice, thereby producing a range of problems for those with the disease, and affecting the ability to communicate. 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. Data from 98 ET cases were compared with data from 100 controls and 85 patients with another movement disorder (Parkinson’s disease, PD). VHI scores were higher in ET cases than controls (p50.02). VHI scores among ETMarked VT were similar to those of PD cases; both were significantly higher than controls (p,0.001). The three VHI subscale scores (physical, functional, emotional) were highest in ETMarked VT, with values that were similar to those observed in PD.
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