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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
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| Measure | Description | Time Frame |
|---|---|---|
| Instrumental acoustic voice parameters | 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). | Before (initial diagnosis) and after voice therapy, expected average of 11-20 weeks after initial diagnosis) |
| Measure | Description | Time Frame |
|---|---|---|
| Subjective voice symptoms | Subjective voice symptoms are measured before and after voice therapy by the patient questionnaire "Voice Handicap Index" (VHI-9i). | Before (initial diagnosis) and after voice therapy, expected average of 11-20 weeks after initial diagnosis) |
| Perceptual voice symptoms |
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Inclusion Criteria:
Exclusion Criteria:
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Patients with functional voice disorders
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| Name | Affiliation | Role |
|---|---|---|
| Joerg E Bohlender, MD | University Hospital Zurich, Department of Otorhinolaryngology | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Clinic for Otorhinolaryngology University Hospital Zurich | Zurich | Canton of Zurich | 8091 | Switzerland |
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Perceptual (hearable) voice symptoms are determined by the examiner before and after voice therapy using GRBAS Scale (Grading-Roughness-Breathiness-Asthenia-Strain Scale). |
| Before (initial diagnosis) and after voice therapy, expected average of 11-20 weeks after initial diagnosis) |