Correlation of the Voice Handicap Index-10 (VHI-10) and Voice-Related Quality of Life (V-RQOL) in Patients With Dysphonia
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Summary

Objectives

This study examines the correlation between two voice-specific patient-reported outcome measures: the Voice Handicap Index-10 (VHI-10) and Voice-Related Quality of Life (V-RQOL).

Study Design

Retrospective chart review.

Participants

Eight hundred four patients presenting to our voice clinic between May 2009 and August 2011. All patients completed the VHI-10 and V-RQOL in a single sitting.

Methods

Correlation between the two scales was examined using Spearman rank analysis. Calculated VHI-10 score was derived from V-RQOL score by direct conversion equation and compared with measured VHI-10 score. Receiver Operating Characteristic (ROC) curves were derived for diagnostic groups.

Results

Spearman correlation coefficient between the VHI-10 and V-RQOL was 鈭?.91 (P聽<聽0.0001). VHI-10 and V-RQOL scores were also significantly correlated among diagnostic categories. Calculated and measured VHI-10 scores were significantly different both for individuals and overall. Area under the curve (AUC) values from ROC curves were significantly different for the presbyphonia (V-RQOL AUC聽=聽0.586 [standard error, SE聽卤聽0.033]; VHI-10 AUC聽=聽0.530 [SE聽卤聽0.031]; P聽=聽0.0014) and muscle tension dysphonia (V-RQOL AUC聽=聽0.536 [SE聽卤聽0.026]; VHI-10 AUC聽=聽0.508 [SE聽卤聽0.26]; P聽=聽0.018) groups, with the V-RQOL showing relatively greater sensitivity.

Conclusions

The VHI-10 and V-RQOL are highly correlated. However, VHI-10 score cannot be calculated from V-RQOL score using the tested equation. The V-RQOL may be more sensitive than the VHI-10 in detecting the impact of presbyphonia and muscle tension dysphonia.

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