Voice Quality as Therapeutic Outcome in Laryngopharyngeal Reflux Disease: A Prospective Cohort Study

Abstract

Purpose: To study the usefulness of voice quality as therapeutic outcome in laryngopharyngeal reflux disease.

Material and methods: A total of 80 patients with reflux finding score (RFS) > 7 and reflux symptom index (RSI) > 13 were treated with pantoprazole, diet, and lifestyle recommendations for 3 months. The therapeutic effectiveness was assessed with RSI; RFS; Voice Handicap Index; blinded Grade, Roughness, Breathiness, Asthenia, Strain, and Instability (GRBASI); aerodynamic and a panel of acoustic measurements before and after treatment. A correlation analysis between symptoms, videolaryngostroboscopic signs, and acoustic measurements was conducted.

Results: Compared to baseline, means of RSI, RFS, Voice Handicap Index, perceptual dysphonia, and roughness significantly decreased. Significant improvements of phonatory quotient, percent jitter, percent shimmer, Relative Average Perturbation, Pitch Perturbation Quotient, Phonatory F0 Range, Amplitude Perturbation Quotient, smooth Amplitude Perturbation Quotient, and Peak-to-Peak Amplitude Variation were found at the end of treatment. Studies of correlation did not identify relevant correlation between videolaryngostroboscopic signs, especially vocal folds edema, and objective voice quality evaluations.

Conclusion: Voice quality assessments can help to better understand voice disorders and can be used as indicators of the treatment effectiveness in patients with laryngopharyngeal reflux-related symptoms.

Keywords: Acoustic; Laryngitis; Laryngopharyngeal; Reflux; Voice.