[Cultural adaptation of 2 questionnaires for health measurement in patients with vertigo].

Objective: To perform a transcultural adaptation form English to Spanish of two common questionnaires of handicap assessment in vestibular disorders.

Study Design: Prospective study.

Patients: 337 patients seen for non-acute dizziness from peripheral or central origin in a tertiary referral setting.

Main Outcome Measures: Dizziness Handicap Inventory test and UCLA-Dizziness Questionnaire after transcultural adaptation following the method of translation-backtranslation, expert assessment and statistical validation.

Results: The results after cultural adaptation and reliability assessment provide a firm basis to demonstrate the close relation of the Spanish and English version in all the items and their meaning.

Conclusion: This adapted questionnaires can be used to assess vestibular disability with no loss of metric values of the original version.