1 University of Zagreb, Faculty of Education and
Rehabilitation Sciences, Department of Speech and
Language Pathology, Zagreb, Croatia
2 Clinical Hospital "Sveti Duh", Department of
Otorhinolaryngology and Head and Neck Surgery,
Citation: Cvelbar D, Bonetti A, Simunjak B. Voice quality before and after thyroidectomy. J Spec Educ Rehab 2016; 17(1-2):50-65.
Introduction: Voice disorders are a well-known complication which is often associated with thyroid gland diseases and because voice is still the basic mean of communication it is very important to maintain its quality healthy.
Objectives: The aim of this study referred to questions whether there is a statistically significant difference between results of voice self-assessment, perceptual voice assessment and acoustic voice analysis before and after thyroidectomy and whether there are statistically significant correlations between variables of voice self-assessment, perceptual assessment and acoustic analysis before and after thyroidectomy.
Methods: This scientific research included 12 participants aged between 41 and 76. Voice self-assessment was conducted with the help of Croatian version of Voice Handicap Index (VHI). Recorded reading samples were used for perceptual assessment and later evaluated by two clinical speech and language therapists. Recorded samples of phonation were used for acoustic analysis which was conducted with the help of acoustic program Praat. All of the data was processed through descriptive statistics and nonparametric statistical methods.
Results: Results showed that there are statistically significant differences between results of voice self-assessments and results of acoustic analysis before and after thyroidectomy. Statistically significant correlations were found between variables of perceptual assessment and acoustic analysis.
Conclusion: Obtained results indicate the importance of multidimensional, preoperative and postoperative assessment. This kind of assessment allows the clinician to describe all of the voice features and provides appropriate recommendation for further rehabilitation to the patient in order to optimize voice outcomes.
Keywords: voice quality, thyroidectomy, voice self-assessment, perceptual voice assessment, acoustic voice analysis