AD8-Brazil: Cross-cultural validation of the ascertaining dementia interview in portuguese

Clarice Câmara Correia, Fábia Lima, Franco Junqueira, Marília Siqueira Campos, Othon Bastos, Kátia Petribú, Jerson Laks, James E. Galvin

Research output: Contribution to journalReview articlepeer-review

26 Scopus citations


Dementia is a global public health problem and detection in the primary care setting, particularly in developing countries, is challenging. The aim of this research was to produce the cross-cultural validation of the AD8 interview to the Brazilian Portuguese Language. The original version of the AD8 was submitted to translation, back-translation, and application of the questionnaire to 20 elderly informants for face validation. The AD8-Brazil was then evaluated in 109 community-dwelling elderly with a sociodemographic questionnaire, clinical examination, Mini Mental State Examination (MMSE), Katz Inventory of Activities of Daily Living (ADL), and Clinical Dementia Rating scale (CDR). The AD8-Brazil was compared with the other instruments and with the clinical diagnosis (DSM-IV) for criterion validation. There was significant agreement of AD8-Brazil with diagnosis of dementia (p < 0.001), MMSE (p = 0.047), and ADL (PFisher = 0.004). Also, the AD8-Brazil was able to differentiate the stages of dementia by CDR scale. The reliability was high (alpha = 0.818) and reproducibility analysis showed excellent inter-rater (kappa = 0.889) and test-retest consistency (kappa = 0.814). The AD8-Brazil showed excellent discrimination between CDR 0 and CDR > 0 (area under the curve 86.1%) and between CDR 0 and CDR 0.5 (area under the curve 76.9%). The administration of the questionnaire took 2.3 ± 0.1 minutes. The Brazilian version of the AD8 is a valid, reliable, quick, and easy screening instrument for dementia.

Original languageEnglish (US)
Pages (from-to)177-185
Number of pages9
JournalJournal of Alzheimer's Disease
Issue number1
StatePublished - 2011
Externally publishedYes


  • AD8
  • cross-cultural
  • dementia
  • elderly
  • screening

ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Psychology
  • Geriatrics and Gerontology
  • Psychiatry and Mental health


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