title: Cross-cultural adaptation of the quality of life assessment scale on Alzheimer disease.
abstract: OBJECTIVE
  To present the internal validation of the quality of life (QOL) evaluation scale for patients with Alzheimer's disease (AD) and their caregivers/family members, proposed by Logsdon et al.
  
  
  METHODS
  The scale was adapted through translation, back translation and equivalence evaluation. The Portuguese version was administered to a sample of 40 patients with mild to moderate AD according to NINCDS ADRDA and DSM-III-R criteria, and also to their respective caregivers/family members.
  
  
  RESULTS
  The reliability of the instrument was excellent, both in the intra and the inter-examiner test-retest. The correlation coefficients for the intra-examiner assessment were 0.87/0.95/0.95 (p < 0.001)) for the patient, family and caregiver versions, respectively. The correlation coefficients for the inter-examiner assessment were 0.76/0.96/0.93 (p < 0.001) for the patients, family and caregiver versions, respectively. The reliability was excellent for both the patient and the relatives' versions in relation to the patient's QOL (alpha = 0.81 and 0.85, respectively), and also in relation to the caregiver's QOL (alpha = 0.84).
  
  
  CONCLUSIONS
  The adapted version of the instrument proved to be straightforward and brief, presenting excellent stability and reliability. The Portuguese version can be obtained by contacting the first author.
authors.affiliation: Grupo de Neurologia Cognitiva e do Comportamento da Divisião de Clínica Neurológica do Hospital das Clínicas (HC) da Faculdade de Medicina da Universidade de São Paulo (FMUSP) São Paulo, SP, Brasil.
authors.forename: Marcia Maria Pires Camargo
authors.initials: MM
authors.lastname: Novelli
authors.forename: Heloisa Helena
authors.initials: HH
authors.lastname: Dal Rovere
authors.forename: Ricardo
authors.initials: R
authors.lastname: Nitrini
authors.forename: Paulo
authors.initials: P
authors.lastname: Caramelli
mesh_terms: D000328:Adult; D000368:Aged; D000544:Alzheimer Disease / Q000523:psychology*; D017028:Caregivers / Q000523:psychology*; D003466:Cultural Characteristics; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales; D011788:Quality of Life; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D014175:Translating