Vestibular PathologyNCT07468864
Validity of the Turkish Situational Vertigo Questionnaire
An observational study of Vestibular Pathology, run by Istanbul Medipol University Hospital at 1 site in Turkey (Türkiye).
Trial summary
This study was planned to examine the validity and reliability of the Turkish version of the Situational Vertigo Questionnaire (SVQ), which is used to evaluate dizziness symptoms frequently seen in vestibular pathologies and triggered by visual or environmental stimuli. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Vestibular Pathology
- What is being tested?
- validity and reliability
- How many people
- 3 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 16 Feb 2026to 20 Feb 2027
- How long will I take part?
- 1 Year
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Frequent complaints of dizziness and imbalance in vestibular pathologies are significant clinical problems that negatively affect individuals' daily life activities, social participation, and quality of life. In particular, valid and reliable measurement tools reflecting the individual's subjective experience are needed in the evaluation of situational dizziness symptoms triggered by visual or environmental stimuli. In this context, the Situational Vertigo Questionnaire (SVQ), widely used in the international literature, stands out as an important tool in the evaluation of dizziness symptoms associated with situational and visual stimuli.
Who may be able to join
- Presence of dizziness triggered by visual or environmental stimuli
- Able to read and write Turkish
- Voluntary agreement to participate in the study
- Having the mental capacity to give informed consent (Mini Mental State Scale score ≥ 24)
Who cannot join
- Individuals with severe cognitive impairment or communication difficulties
- Acute neurological disease (stroke, acute MS relapse, etc.)
- Having undergone vestibular surgery within the last 3 months
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Turkey (Türkiye)1 site, 1 recruiting
- Recruiting
Güneşli Erdem Hastanesi
Bağcılar, Güneşli, 34200
Güneşli Erdem hastane, 08502220494
About this study
Official title: Turkish Adaptation of the Situational Vertigo Questionnaire: Validity and Reliability Study
This study was planned to examine the validity and reliability of the Turkish version of the Situational Vertigo Questionnaire (SVQ), which is used to evaluate dizziness symptoms frequently seen in vestibular pathologies and triggered by visual or environmental stimuli. The research is designed as a methodological scale adaptation and psychometric evaluation study. The study plans to include individuals aged 18 and over who can read and understand Turkish and have complaints of situational dizziness. The Turkish adaptation process of the SVQ will be carried out using the back-and-forth translation method; a pilot application will be conducted after ensuring linguistic and cultural equivalence. For the psychometric evaluation, the sample size is planned to be at least 10 times the number of items, and participants will be asked to complete the SVQ, as well as the Dizziness Handicap Inventory (DHI), Vertigo Symptom Scale (VSS), and Visual Analog Scale (VAS). To evaluate test-retest reliability, a subgroup of participants will be re-administered the SVQ after 7 days. No invasive procedures will be performed on participants during the research; only survey forms will be used. Written informed consent will be obtained from all participants, and data will be coded and analyzed in accordance with confidentiality principles. It is expected that the findings of this study will contribute to the literature by establishing a valid and reliable measurement tool in Turkish for the evaluation of situational dizziness symptoms and will support clinical evaluation processes.
- Conditions
- Vestibular Pathology
- Being tested
- validity and reliability
- Keywords
- situational vertigo questionnaire, validity, reliability, vestibular pathology
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
validity and reliabilityOther
The Turkish adaptation of the Situational Vertigo Questionnaire (SVQ) will follow internationally accepted cross-cultural adaptation guidelines using a forward-backward translation method. Two independent bilingual translators will translate the original English version into Turkish, producing two versions that will be compared and synthesized into a preliminary Turkish form. This version will then be back-translated into English by two native English speakers blinded to the original scale. A committee of translators and experts will review all versions to ensure conceptual and linguistic equivalence and create a pre-final Turkish version. The pre-final version will be pilot tested with 20 participants to assess clarity and comprehension. Items reported as unclear will be revised. Finally, the scale will be administered to a larger sample for psychometric evaluation of validity and reliability.
| Study group | Role | What they receive |
|---|---|---|
| Vestibular Patients | The target population of this study consists of individuals aged 18 years and older who can read and understand Turkish and experience dizziness triggered by visual or environmental stimuli. Written informed consent will be obtained from all participants. Sociodemographic and clinical characteristics, including age, sex, occupation, smoking and alcohol use, comorbidities, medical history, medications, daily activity level, onset and type of the condition, fall history, and sensitivity to heights, darkness, and crowded environments, will be recorded using a researcher-designed form. Based on the "item number × 10" rule, at least 190 participants will be included for the 19-item Situational Vertigo Questionnaire (SVQ). Participants will complete the SVQ, Dizziness Handicap Inventory (DHI), and Vertigo Symptom Scale (VSS), and rate satisfaction using a Visual Analog Scale. Test-retest reliability will be assessed in at least 20% of participants after 7-14 days. Receives: Other: validity and reliability |
What is being measured
The primary outcome is the main question the study is designed to answer.
Situational Vertigo Questionnaire (SVQ)
The Situational Vertigo Questionnaire (SVQ) is a 19-item self-report scale designed to assess visual vertigo associated with increased visual dependence and insufficient vestibular compensation. Visual vertigo refers to dizziness triggered or worsened in visually complex or disorienting environments such as supermarkets, driving, or moving visual scenes. The condition is thought to arise from difficulties resolving conflicts between visual, vestibular, and proprioceptive inputs. The SVQ asks individuals to rate the severity of dizziness in situations involving visual motion or visual-vestibular conflict. Each item is scored from 0 (none) to 4 (severe), and participants may select "never experienced" if applicable. The total score is calculated based on the average item score, adjusted for items marked as not experienced, with higher scores indicating more severe symptoms.
Measured: Baseline and 7-14 days follow-up
Secondary outcomes (2)
Dizziness Handicap Inventory (DHI)
The scale is used to evaluate the physical, emotional, and functional effects of vestibular disorders. Items 1, 4, 8, 11, 13, 17, and 25 assess physical disability; items 2, 9, 10, 15, 18, 20, 21, 22, and 23 assess emotional disability; and items 3, 5, 6, 7, 12, 14, 16, 19, and 24 assess functional disability. Each item is scored as "yes" (4 points), "no" (0 points), or "sometimes" (2 points). Cut-off values of 28 points for physical disability and 36 points for functional and emotional disability are used. Higher scores indicate more severe dizziness-related impairment.
Measured: Baseline and 7-14 days follow-up
Vertigo Symptom Scale (VSS)
This questionnaire is designed to assess symptoms accompanying dizziness or perceived imbalance, their frequency, the individual's general mood and anxiety level, and the impact of these symptoms on quality of life. Participants rate each symptom according to how often it occurs using a scale from 0 to 4 (0 = never, 1 = very rarely, 2 = sometimes, 3 = often [about once a week], 4 = very often [most days]). The Turkish validity and reliability of the scale was established by Yanık and colleagues.
Measured: Baseline and 7-14 days follow-up
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 Mar 2026
- Study start16 Feb 2026
- Primary completion2 Mar 2026 (estimated)
- Study completion20 Feb 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Vestibular PathologyStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Other
- Time perspective
- Prospective
- Enrolment
- 3 participants (estimated)
- Target duration
- 1 Year
Sponsor and investigators
- Lead sponsor
- Istanbul Medipol University Hospital
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Ebru Sever, Kocaeli University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07468864
- Sponsor's protocol ID
- SVQ Validity and Reliability
- Status last verified
- Mar 2026
- First submitted
- 9 Mar 2026
- Last updated
- 13 Mar 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 13 Mar 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Turkish Adaptation of the Situational Vertigo Questionnaire: Validity and Reliability Study
- ClinicalTrials.gov ID
- NCT07468864
- Acronym / sponsor ID
- SVQ Validity and Reliability
- Conditions
- Vestibular Pathology
- Keywords
- situational vertigo questionnaire, validity, reliability, vestibular pathology
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 3 participants (estimated)
- Lead sponsor
- Istanbul Medipol University HospitalUniversity, hospital or other
- Study start
- 16 Feb 2026 (actual)
- Primary completion
- 2 Mar 2026 (estimated)
- Study completion
- 20 Feb 2027 (estimated)
- First posted
- 13 Mar 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study was planned to examine the validity and reliability of the Turkish version of the Situational Vertigo Questionnaire (SVQ), which is used to evaluate dizziness symptoms frequently seen in vestibular pathologies and triggered by visual or environmental stimuli. The research is designed as a methodological scale adaptation and psychometric evaluation study. The study plans to include individuals aged 18 and over who can read and understand Turkish and have complaints of situational dizziness. The Turkish adaptation process of the SVQ will be carried out using the back-and-forth translation method; a pilot application will be conducted after ensuring linguistic and cultural equivalence. For the psychometric evaluation, the sample size is planned to be at least 10 times the number of items, and participants will be asked to complete the SVQ, as well as the Dizziness Handicap Inventory (DHI), Vertigo Symptom Scale (VSS), and Visual Analog Scale (VAS). To evaluate test-retest reliability, a subgroup of participants will be re-administered the SVQ after 7 days. No invasive procedures will be performed on participants during the research; only survey forms will be used. Written informed consent will be obtained from all participants, and data will be coded and analyzed in accordance with confidentiality principles. It is expected that the findings of this study will contribute to the literature by establishing a valid and reliable measurement tool in Turkish for the evaluation of situational dizziness symptoms and will support clinical evaluation processes.
Study design
- Observational model
- Other
- Time perspective
- Prospective
- Target follow-up
- 1 Year
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Vestibular Patients | – | Other: validity and reliabilityThe target population of this study consists of individuals aged 18 years and older who can read and understand Turkish and experience dizziness triggered by visual or environmental stimuli. Written informed consent will be obtained from all participants. Sociodemographic and clinical characteristics, including age, sex, occupation, smoking and alcohol use, comorbidities, medical history, medications, daily activity level, onset and type of the condition, fall history, and sensitivity to heights, darkness, and crowded environments, will be recorded using a researcher-designed form. Based on the "item number × 10" rule, at least 190 participants will be included for the 19-item Situational Vertigo Questionnaire (SVQ). Participants will complete the SVQ, Dizziness Handicap Inventory (DHI), and Vertigo Symptom Scale (VSS), and rate satisfaction using a Visual Analog Scale. Test-retest reliability will be assessed in at least 20% of participants after 7-14 days. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Frequent complaints of dizziness and imbalance in vestibular pathologies are significant clinical problems that negatively affect individuals' daily life activities, social participation, and quality of life. In particular, valid and reliable measurement tools reflecting the individual's subjective experience are needed in the evaluation of situational dizziness symptoms triggered by visual or environmental stimuli. In this context, the Situational Vertigo Questionnaire (SVQ), widely used in the international literature, stands out as an important tool in the evaluation of dizziness symptoms associated with situational and visual stimuli.
Key inclusion criteria (4 listed)
- Presence of dizziness triggered by visual or environmental stimuli
- Able to read and write Turkish
- Voluntary agreement to participate in the study
- Having the mental capacity to give informed consent (Mini Mental State Scale score ≥ 24)
Key exclusion criteria (3 listed)
- Individuals with severe cognitive impairment or communication difficulties
- Acute neurological disease (stroke, acute MS relapse, etc.)
- Having undergone vestibular surgery within the last 3 months
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| validity and reliabilityThe Turkish adaptation of the Situational Vertigo Questionnaire (SVQ) will follow internationally accepted cross-cultural adaptation guidelines using a forward-backward translation method. Two independent bilingual translators will translate the original English version into Turkish, producing two versions that will be compared and synthesized into a preliminary Turkish form. This version will then be back-translated into English by two native English speakers blinded to the original scale. A committee of translators and experts will review all versions to ensure conceptual and linguistic equivalence and create a pre-final Turkish version. The pre-final version will be pilot tested with 20 participants to assess clarity and comprehension. Items reported as unclear will be revised. Finally, the scale will be administered to a larger sample for psychometric evaluation of validity and reliability. | Other | Vestibular Patients |
Primary outcome
Situational Vertigo Questionnaire (SVQ)
Time frame: Baseline and 7-14 days follow-up
The Situational Vertigo Questionnaire (SVQ) is a 19-item self-report scale designed to assess visual vertigo associated with increased visual dependence and insufficient vestibular compensation. Visual vertigo refers to dizziness triggered or worsened in visually complex or disorienting environments such as supermarkets, driving, or moving visual scenes. The condition is thought to arise from difficulties resolving conflicts between visual, vestibular, and proprioceptive inputs. The SVQ asks individuals to rate the severity of dizziness in situations involving visual motion or visual-vestibular conflict. Each item is scored from 0 (none) to 4 (severe), and participants may select "never experienced" if applicable. The total score is calculated based on the average item score, adjusted for items marked as not experienced, with higher scores indicating more severe symptoms.
2 secondary outcomes
Dizziness Handicap Inventory (DHI)
Time frame: Baseline and 7-14 days follow-up
Vertigo Symptom Scale (VSS)
Time frame: Baseline and 7-14 days follow-up
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 13 Mar 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Vestibular Pathology, run by Istanbul Medipol University Hospital at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 13 Mar 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Ebru Sever, MsC, PT (05336824227, ebru.sever@kocaelisaglik.edu.tr), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Situational Vertigo Questionnaire (SVQ) (time frame: Baseline and 7-14 days follow-up). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 Mar 2026.