title: Cross-cultural adaptation, reliability and validity of the DAFS-R in a sample of Brazilian older adults.
abstract: The Direct Assessment of Functional Status-Revised (DAFS-R) is an instrument developed to objectively measure functional capacities required for independent living. The objective of this study was to translate and culturally adapt the DAFS-R for Brazilian Portuguese (DAFS-BR) and to evaluate its reliability and validity. The DAFS-BR was administered to 89 older patients classified previously as normal controls, mild cognitive impairment (MCI) and Alzheimer's disease (AD). The results indicated good internal consistency (Cronbach's alpha = 0.78) in the total sample. The DAFS-BR showed high interobserver reliability (0.996; p < .001) as well as test-retest stability over 1-week interval (0.995; p < .001). Correlation between the DAFS-BR total score and the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE) was moderate and significant (r = -.65, p < .001) in the total sample, whereas it did not reach statistical significance within each diagnostic group. Receiver operating characteristic curve analyses suggested that DAFS-BR has good sensitivity and specificity to identify MCI and AD. Results suggest that DAFS-BR can document degrees of severity of functional impairment among Brazilian older adults.
authors.affiliation: Department and Institute of Psychiatry, University of São Paulo, SP, Brazil.
authors.forename: Fernanda Speggiorin
authors.initials: FS
authors.lastname: Pereira
authors.forename: Alexandra Martini
authors.initials: AM
authors.lastname: Oliveira
authors.forename: Breno Satler
authors.initials: BS
authors.lastname: Diniz
authors.forename: Orestes Vicente
authors.initials: OV
authors.lastname: Forlenza
authors.forename: Mônica Sanches
authors.initials: MS
authors.lastname: Yassuda
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000175:diagnosis* / Q000208:ethnology; D001938:Brazil; D003072:Cognition Disorders / Q000175:diagnosis* / Q000208:ethnology; D003431:Cross-Cultural Comparison; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D057187:Independent Living / Q000145:classification / Q000523:psychology*; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D011446:Prospective Studies; D011594:Psychometrics / Q000706:statistics & numerical data; D012016:Reference Values; D015203:Reproducibility of Results; D014175:Translating