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Validated argentine version of the visual vertigo analogue scale
Daniel H Verdecchia1,2,3, Daniel Hernandez3,4, Mauro F Andreu1
1Physical Therapy Program, Health Sciences Department, Universidad Nacional de la Matanza, Buenos Aires, Argentina.
Background:
Visual vertigo (VV), triggered by environmental or dynamic visual stimuli and repetitive visual patterns, can affect daily life activities. The Visual Vertigo Analogue Scale (VVAS) is a valid and reliable self-administered questionnaire to assess VV, which has been culturally adapted to the Argentine population but has not been validated.
Objective:
To validate the Argentine version of VVAS (VVAS-A) by confirming its psychometric properties in patients with vestibular disorders.
Methods:
Vestibular patients (n = 82) completed the VVAS-A and the Dizziness Handicap Inventory Argentine version (DHI-A) during their initial visit and one week later. The VVAS-A's internal consistency, test retest reliability, ceiling and floor effects, and construct validity were determined. Test-retest data (n = 71) was used to calculate reliability using the intraclass correlation coefficient (ICC 2.1).
Results:
A ceiling effect was observed in 12 patients (14.6%). Internal consistency was acceptable (Cronbach's alpha: 0.91). The reliability was r = 0.764 [CI 95%: 0.7 -0.86]). Correlations were observed between the VVAS-A and the total DHI-A score (rho = 0.571), the DHI-A physical subscale (rho: 0.578), and DHI-A functional and emotional subscales of the DHI-A (rho: 0.537 and 0.387, respectively).
Conclusion:
The VVA-A is a valid, reliable tool to evaluate VV in patients with vestibular disorders.
