Improvement in Acoustic Voice Characteristics in Functional Dysphonia After Therapy
|ClinicalTrials.gov Identifier: NCT02518425|
Recruitment Status : Completed
First Posted : August 7, 2015
Last Update Posted : May 16, 2016
In a retrospective analysis of already existing clinical assessment data from patients with functional voice disorders the following aspects will be sampled, encoded and analysed: Outcomes pre and post treatment of
- subjective voice symptoms measured by Voice Handicap Index (VHI-9i),
- perceptual voice symptoms according to Grading-Roughness-Breathiness-Asthenia-Strain Scale (GRBAS Scale),
- instrumental acoustic analysis parameters Jitter (%), speaking voice profile: mean and range of speaking pitch and intensity, max. intensity and mean pitch of calling voice, singing voice: min./max. and range of pitch and intensity, maximum phonation time, Dysphonia Severity Index (DSI).
|Condition or disease|
|Functional Voice Disorder|
|Study Type :||Observational|
|Actual Enrollment :||50 participants|
|Official Title:||Which Instrumental Acoustic Voice Parameters Indicate Vocal Improvement After Voice Therapy in Patients With Functional Dysphonia|
|Study Start Date :||April 2015|
|Actual Primary Completion Date :||December 2015|
|Actual Study Completion Date :||December 2015|
- Instrumental acoustic voice parameters [ Time Frame: Before (initial diagnosis) and after voice therapy, expected average of 11-20 weeks after initial diagnosis) ]Instrumental acoustic parameters are determined by a computer-assisted analysis of voice recordings. In the present study the following parameters are measured before and after voice therapy: Jitter % (deviation of fundamental frequency), mean and range of speaking pitch and intensity, maximum intensity and mean pitch of calling voice, minimum and max. and range of pitch and intensity of the singing voice, and the composite measure Dysphonia Severity Index (DSI).
- Subjective voice symptoms [ Time Frame: Before (initial diagnosis) and after voice therapy, expected average of 11-20 weeks after initial diagnosis) ]Subjective voice symptoms are measured before and after voice therapy by the patient questionnaire "Voice Handicap Index" (VHI-9i).
- Perceptual voice symptoms [ Time Frame: Before (initial diagnosis) and after voice therapy, expected average of 11-20 weeks after initial diagnosis) ]Perceptual (hearable) voice symptoms are determined by the examiner before and after voice therapy using GRBAS Scale (Grading-Roughness-Breathiness-Asthenia-Strain Scale).
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02518425
|Clinic for Otorhinolaryngology University Hospital Zurich|
|Zurich, ZH, Switzerland, 8091|
|Principal Investigator:||Joerg E Bohlender, MD||University Hospital Zurich, Department of Otorhinolaryngology|