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 -0.91 (pΒ <Β 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 aucΒ =Β 0.586 [standard error, seΒ Β±Β 0.033]; vhi-10 aucΒ =Β 0.530 [seΒ Β±Β 0.031]; pΒ =Β 0.0014) and muscle tension dysphonia (v-rqol aucΒ =Β 0.536 [seΒ Β±Β 0.026]; vhi-10 aucΒ =Β 0.508 [seΒ Β±Β 0.26]; pΒ =Β 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.