Cross-cultural adaptation, reliability and validity of the DAFS-R in a sample of Brazilian older adults.
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.
Pereira
Fernanda Speggiorin
FS
Department and Institute of Psychiatry, University of São Paulo, SP, Brazil.
Oliveira
Alexandra Martini
AM
Diniz
Breno Satler
BS
Forlenza
Orestes Vicente
OV
Yassuda
Mônica Sanches
MS
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