Validity of the Turkish Situational Vertigo Questionnaire
ConditionVestibular Pathology
Trial statusRecruiting
Trial phaseNot listed
Trial typeObservational
Biological sexAll
Age18+
SponsorIstanbul Medipol University Hospital
About this trial
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.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
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)
Disqualifiers
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 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.
Trial design
Design model
Other
Time perspective
Prospective
Treatments tested in this trial
validity and reliability
Other interventionThe 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.
Treatment groups
3 Participants
are divided into 1 treatment groupGroup A: Vestibular Patients1 intervention
Trial outcomes
Primary outcomes
1
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.
Time frame
Baseline and 7-14 days follow-upSecondary outcomes
1
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.
Time frame
Baseline and 7-14 days follow-up2
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.
Time frame
Baseline and 7-14 days follow-upOther outcomes
1
Participant Satisfaction/Visual Analog Scale (VAS)
Participant satisfaction and enjoyment will be assessed using a 10-cm Visual Analog Scale (VAS). The scale consists of a 10 cm (100 mm) horizontal or vertical line with endpoints representing opposite extremes. In this study, one end indicates "very good satisfaction" and the other indicates "very poor satisfaction (0)." Participants mark the point that best represents their perception. Although commonly used to measure pain intensity, the VAS is also widely applied to evaluate various subjective outcomes. In this study, it will be used to assess participants' level of satisfaction.
Time frame
Baseline and 7-14 days follow-upSponsors and contacts
Click on the lead sponsor to view all of their trials.
Istanbul Medipol University Hospital
Lead sponsor
Kocaeli University
Sponsor institution
Source ClinicalTrials.gov