A avaliação da reprodutividade foi realizada por intermédio do teste de Wilcoxon para duas amostras dependentes, P < 0,05. A avaliação da reprodutividade foi realizada por intermédio do teste de pesquisadores. MÉTODO: o DHI foi aplicado, inicialmente, em 45 pacientes com tontura crônica e hipótese diagnóstica de síndrome vestibular, seguindo as etapas de tradução do idioma Inglês para o Português e adapatação lingüística, revisão da equivalência gramatical e idiomática, adaptação cultural e avaliação da reprodutividade intra e interpesquisadores. OBJETIVO: adaptar culturalmente o Dizziness Handicap Inventory (DHI) para aplicação na população brasileira, avaliar sua reprodutibilidade e descrever os resultados obtidos à aplicação deste questionário em pacientes com tontura crônica. TEMA: impacto da tontura na qualidade de vida (QV). Quality of Life Dizziness Vertigo Vestibular Diseases Physical aspects were the most compromised. This loss was verified by the application of the Brazilian DHI. Patients with chronic dizziness and with clinical diagnosis of vestibular syndrome presented a loss in LQ, due to this symptom. This instrument was considered to be a reliable tool to evaluate the impact of dizziness on LQ. CONCLUSION: the DHI was culturally adapted for application in the Brazilian population (Brazilian DHI). No association was verified between gender and the overall mean scores of the DHI and between gender and the mean scores of each aspect assessed by the DHI. Functional aspects were more compromised in older individuals. Aspects which were most affected were the physical ones, followed by, in a decreasing order, the functional and the emotional ones. All of the studied patients presented a loss in LQ due to dizziness. RESULTS: The Brazilian version of the DHI (Brazilian DHI) was well comprehended by the studied population and no statistically significant difference was found in the inter-researcher (P = 0.418) and intra-researcher (P = 0.244) reproducibility. The questionnaire was applied on 250 patients with chronic vestibular syndrome in order to evaluate the impact of dizziness on LQ. Reproducibility was assessed by using the Wilcoxon Test for two dependent samples, P < 0.05. The application followed the stages of translation - from English to Portuguese - and linguistic adaptation, grammatical and idiomatic equivalence review and evaluation of its intra and inter-researchers reproducibility. METHOD: The DHI was initially applied in 45 patients with chronic dizziness and with a clinical diagnosis of vestibular syndrome. AIM: to adapt the Dizziness Handicap Inventory (DHI) for application in the Brazilian population to assess its reproducibility and to describe the results obtained in patients with chronic dizziness. BACKGROUND: impact of dizziness on life quality (LQ).
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