The Spasmodic Dysphonia (SD): Epidemiology and Patient Management

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00019933

Enrollment

100

Registered

2020-02-21

Start date

2018-11-29

Completion date

Unknown

Last updated

2026-06-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

G24.8

Interventions

Group 1: All patients included in the study will be followed for a maximum of 13 months. For this duration, the results of all tests and treatments in connection with spasmodic dysphonia are collected

Short Version) • Voice Problems Questionnaire • Diary.

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: • Age = 18 years • Patients diagnosed with adductory Spasmodic Dysphonia • Signed and dated informed consent before the start of any registry-specific procedure for all the recruited subjects.

Exclusion criteria

Exclusion criteria: • Lack of compliance with any inclusion criteria • Other clinical diseases that might result in alteration of the outcomes of this registry (e.g. muscular and/or skin diseases, epilepsy) • Parallel participation in a device/drug clinical investigation in the period of data collec-tion, which could confound the results of the Registry 2018REG003.

Design outcomes

Primary

Measure	Time frame
The results of the following tests and questionnaires will be collected for a 13 month periode, provided they were used in regular clinical practice: •Maximum Phonation Time, MPT •F0 measured during reading 10 sentences rich in vowels with normal pitch •Number of spasms during reading 10 sentences rich in vowels with normal pitch •Strain assessment during reading 10 sentences rich in vowels with normal pitch •Medical and medicinal history and current SD symptoms •LEMG •Videolaryngoscopy and Videolaryngostroboscopy •Voice Range Profile, VRP •Fundamental frequencies (F0) •sound pressure level •Jitter •Dysphonia Severity Index (DSI) •Roughness, Breathiness, and Hoarseness (RBH) •Voice Handicap Index (VHI-9i) •Overall phonation effort estimation •Sydney Swallow Questionnaire •Glasgow Benefit Inventory (GBI) •Communicative Participation Item Bank (CPIB; Short Version) •Voice Problems Questionnaire •Diary.	—

Measure

Time frame

The results of the following tests and questionnaires will be collected for a 13 month periode, provided they were used in regular clinical practice: •Maximum Phonation Time, MPT •F0 measured during reading 10 sentences rich in vowels with normal pitch •Number of spasms during reading 10 sentences rich in vowels with normal pitch •Strain assessment during reading 10 sentences rich in vowels with normal pitch •Medical and medicinal history and current SD symptoms •LEMG •Videolaryngoscopy and Videolaryngostroboscopy •Voice Range Profile, VRP •Fundamental frequencies (F0) •sound pressure level •Jitter •Dysphonia Severity Index (DSI) •Roughness, Breathiness, and Hoarseness (RBH) •Voice Handicap Index (VHI-9i) •Overall phonation effort estimation •Sydney Swallow Questionnaire •Glasgow Benefit Inventory (GBI) •Communicative Participation Item Bank (CPIB; Short Version) •Voice Problems Questionnaire •Diary.

—

Secondary

Measure	Time frame
The following data will be collected for a 13 month periode, provided they were recorded in the course of the regular clinical practice: • Medical record • Demographic Data (age, gender, hight, weight)	—

Countries

Austria, Germany, Ukraine

Contacts

Public ContactTadeus Nawka

Charité - Universitätsmedizin Berlin

audiologie@charite.de+ 49 30 450 555 125

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Jun 27, 2026