Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE): cross-cultural adaptation for use in Brazil

This article presents the results of the translation and cross-cultural adaptation of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE) and the test-retest reliability of a version to be used in Brazil. An instrument review committee analyzed the conceptual and item equivalenc...

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Bibliographic Details
Published in:Cadernos de saúde pública 2009-07, Vol.25 (7), p.1455-1465
Main Authors: Sanchez, Maria Angélica dos Santos, Lourenço, Roberto Alves
Format: Article
Language:Portuguese
Subjects:
Adult
Aged
Aged, 80 and over
Brazil
Cognition Disorders - diagnosis
Cross-Sectional Studies
Cultural Characteristics
Female
Geriatric Assessment - methods
Humans
Language
Male
Middle Aged
Reproducibility of Results
Surveys and Questionnaires
Translations
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Summary:This article presents the results of the translation and cross-cultural adaptation of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE) and the test-retest reliability of a version to be used in Brazil. An instrument review committee analyzed the conceptual and item equivalence. In order to analyze semantic equivalences, three translations and three back-translations were performed; a summary version was devised and pre-tested, and a test version elaborated. The Cronbach's +/- coefficient and intraclass correlation coefficient (ICC) were used to measure the internal consistency and test-retest reliability, respectively. Of the 169 informants assessed, 97 were retested. A Cronbach's +/- of 0.94 and an ICC of 0.92 were found. The reliability levels lead to the conclusion that the IQCODE-BR version is easy to comprehend. Satisfactory equivalence to the original version was observed.
ISSN:1678-4464
DOI:10.1590/S0102-311X2009000700003