Cross-cultural Adaptation and Validation of the Italian Version of the Vocal Tract Discomfort Scale (I-VTD).

OBJECTIVE: To evaluate the reliability and validity of the Italian version of the VTD scale (I-VTD scale). STUDY DESIGN: Cross-sectional, nonrandomized, prospective study with controls. METHODS: For the item generation, a cross-cultural adaptation and translation process was performed following the back translation process (phase 1). For reproducibility analysis (phase 2), 102 patients with dysphonia were recruited (internal consistency analysis); 57 of them completed the I-VTD scale twice (test-retest reliability analysis). Seventy-three vocally healthy participants completed the I-VTD scale for normative data generation (phase 3). For validity analysis (phase 4), the scores obtained by patients with dysphonia and by vocally healthy participants were compared (construct validity analysis); in addition, 45 patients with dysphonia completed both the I-VTD scale and the Italian version of the Voice Handicap Index for criterion validity analysis. Finally, for responsiveness analysis (phase 5), a cohort of 30 patients with muscle tension dysphonia was recruited, and scores of the I-VTD scale before and after voice therapy were compared. RESULTS: Both the internal consistency and the test-retest reliability of the I-VTD scale were satisfactory. The scores obtained by patients with dysphonia and vocally healthy participants were significantly different. Moderate correlations between the Italian version of the Voice Handicap Index and the I-VTD scores were found. Finally, the scores of the I-VTD scale obtained in pretreatment conditions appeared to be significantly higher than those obtained after successful voice therapy. CONCLUSION: The I-VTD scale appears a reliable and valid instrument for the assessment of vocal tract discomfort in Italian-speaking patients.

Prevalence and Voice Characteristics of Laryngeal Pathology in an Italian Voice Therapy-seeking Population.

OBJECTIVES: The aim of this study was to determine the prevalence and clinical characteristics of voice disorders in a large group of patients seeking voice therapy. STUDY DESIGN: This is a prospective prevalence study. METHODS: A total of 821 patients were enrolled. Each patient was evaluated following a multidimensional protocol including videolaryngostroboscopy, perception, acoustics, aerodynamics, and self-rating by the patient. Data regarding age, gender, tobacco use, gastroesophageal reflux disease (GERD), and professional voice use were collected and analyzed. RESULTS: Based on videolaryngoscopic findings, the sample group was divided into patients with functional dysphonia (n = 155), patients with organic dysphonia (n = 359), and patients with dysphonia due to movement disorders (n = 307). The most frequently detected pathologies were vocal fold paralysis, muscle tension dysphonia, and vocal fold edema. Children (n = 41) and adolescents (n = 43) represented a minority of the sample group. Dysphonia was significantly more common in women. Organic dysphonia was more common in children and adolescents. GERD was suspected in 382 patients and confirmed in 83 of them; 164 patients were smokers. Professional voice users composed the large majority of the working population and were more frequently affected by organic dysphonia. Patients with dysphonia due to movement disorders presented a worse voice quality and voice-related quality of life. CONCLUSIONS: In patients seeking voice therapy, there are more females than males, children and adolescents represent a minority of the sample, professional voice users more commonly present organic dysphonia, and patients with dysphonia due to movement disorders show significantly worse voice quality.

Multidimensional assessment of vocal changes in benign vocal fold lesions after voice therapy.

OBJECTIVE: To evaluate through a multidimensional protocol voice changes after voice therapy in patients with benign vocal fold lesions. METHODS: 65 consecutive patients affected by benign vocal fold lesions were enrolled. Depending on videolaryngostroboscopy the patients were divided into 3 groups: 23 patients with Reinke's oedema, 22 patients with vocal fold cysts and 20 patients with gelatinous polyp. Each subject received 10 voice therapy sessions and was evaluated, before and after voice therapy, through a multidimensional protocol including videolaryngostroboscopy, perception, acoustics, aerodynamics and self-rating by the patient. Data were compared using Wilcoxon signed-rank test. Kruskal-Wallis test was used to analyse the mean variation difference between the three groups of patients. Mann-Whitney test was used for post hoc analysis. RESULTS: Only in 11 cases videolaryngostroboscopy revealed an improvement of the initial pathology. However a significant improvement was observed in perceptual, acoustic and self-assessment ratings in the 3 groups of patients. In particular the parameters of G, R and A of the GIRBAS scale, and the noise to harmonic ratio, Jitter and shimmer scores improved after rehabilitation. A significant improvement of all the parameters of Voice Handicap Index after rehabilitation treatment was found. No significant difference among the three groups of patients was visible, except for self-assessment ratings. CONCLUSION: Voice therapy may provide a significant improvement in perceptual, acoustic and self-assessed voice quality in patients with benign glottal lesions. Utilization of voice therapy may allow some patients to avoid surgical intervention.

Reliability and validity of the Italian self-evaluation of communication experiences after laryngeal cancer questionnaire.

BACKGROUND: The Self-Evaluation of Communication Experiences after Laryngeal Cancer (SECEL) questionnaire assesses the impact of total laryngectomy on communication-related quality of life (QOL). This study evaluates the Italian version of the SECEL (I-SECEL), including reliability, concurrent validity, and differences in scores between patients who undergo either total laryngectomy or partial laryngectomy. METHODS: Eighty patients who underwent either total laryngectomy or partial laryngectomy completed the I-SECEL twice and the Voice Handicap Index (VHI) and Short Form Health Survey (SF-36) questionnaires once. Voice recordings were used for objective and perceptual assessment. RESULTS: The I-SECEL demonstrated good test-retest reliability and internal consistency for 2 of 3 subscales. Correlations were moderate to strong between most of the I-SECEL scales and the VHI/SF-36 scales. The I-SECEL scales demonstrated moderate associations with most perceptual and objective measures. CONCLUSION: Preliminary evidence supports the convergent validity, test-retest reliability, and internal consistency of the I-SECEL, notwithstanding low internal consistency and test-retest reliability for 1 subscale.

Correlation between the Voice Handicap Index and voice measurements in four groups of patients with dysphonia.

OBJECTIVES: To evaluate the correlation between the Voice Handicap Index (VHI) and objective voice measurements in patients with dysphonia of different origin. STUDY DESIGN: Cross-sectional survey. SETTING: Otolaryngology department in a university hospital. SUBJECTS AND METHODS: One hundred fifteen patients consulting for voice disorders were enrolled in the study: 32 presented with functional dysphonia (Group 1), 24 with unilateral vocal fold paralysis (Group 2), 30 with structural dysphonia (Group 3), and 29 with nodules (Group 4). From each patient, the maximum phonation time (MPT) and a voice spectrogram were obtained: patients with type 1 signal underwent perturbation analysis. Each patient completed the VHI. RESULTS: No significant difference across the four groups, in the VHI scores and voice measurements, was found. The correlation between the different voice measurements was good, while those between the VHI domains were very good. Considering the patients with type 1 signal (n = 80) all together, the correlations between VHI and voice laboratory measurements ranged between poor and good. Analyzing each patient group separately, good correlations were found between MPT and functional and physical VHI domain in Group 1 (r = 0.58 and 0.68), jitter and functional VHI domain in Group 2 (r = 0.61), MPT and functional VHI domain in Group 3 (r = 0.52), and physical VHI domain and jitter, shimmer, and noise-to-harmonic ratio in Group 4 (r = 0.58, 0.77, 0.76). CONCLUSION: The VHI and the voice laboratory measurements give independent information. However, the correlation between VHI and some laboratory measurements increases in populations with voice disorder of the same origin.