title: Assessing quality of life of older people with dementia in long-term care: a comparison of two self-report measures.
abstract: OBJECTIVE
  This study sought to compare two well-known and well-used self-report quality of life questionnaires in terms of completion rates, reliability and assessment of quality of life.
  
  
  BACKGROUND
  People with dementia have a meaningful experience of quality of life and several disease-specific instruments have been designed to capture self-report assessments.
  
  
  METHODS
  A quantitative survey design, with a convenience sample of older people with dementia from four long-term care facilities.
  
  
  METHODS
  Sixty-one participants were recruited for survey on the Dementia Quality of Life questionnaire and the Quality of Life in Alzheimer's Disease questionnaire.
  
  
  RESULTS
  The Quality of Life in Alzheimer's Disease questionnaire had a higher rate of completion (98·4%) than the Dementia Quality of Life questionnaire (68·9%). Those unable to complete the latter measure had significantly greater cognitive impairment (F(1,59) = 30·35, p < 0·001) than those completing the measure. Internal reliability was good for the Quality of Life in Alzheimer's Disease questionnaire (0·86), but there were varying levels found for the five Dementia Quality of Life questionnaire subscales (0·79-0·48). The Quality of Life in Alzheimer's Disease questionnaire was significantly correlated with all the Dementia Quality of Life questionnaire subscales and overall item.
  
  
  CONCLUSIONS
  Although it is recognised that there is no superior instrument in assessing quality of life, this study found both the Quality of Life in Alzheimer's Disease questionnaire and Dementia Quality of Life questionnaire to be useful self-report instruments.
  
  
  CONCLUSIONS
  Assessment of quality of life should include the perspective of the person with dementia. The Quality of Life in Alzheimer's Disease questionnaire and Dementia Quality of Life questionnaire appear to measure similar aspects of quality of life. Where assessments are sought from participants with more advanced cognitive and functional impairment, it may be favourable to employ the Quality of Life in Alzheimer's Disease questionnaire.
authors.affiliation: Griffith Health Institute, Research Centre for Clinical and Community Practice Innovation, Griffith University, Nathan, Qld, Australia. w.moyle@griffith.edu.au
authors.forename: Wendy
authors.initials: W
authors.lastname: Moyle
authors.forename: Natalie
authors.initials: N
authors.lastname: Gracia
authors.forename: Jenny E
authors.initials: JE
authors.lastname: Murfield
authors.forename: Susan G
authors.initials: SG
authors.lastname: Griffiths
authors.forename: Lorraine
authors.initials: L
authors.lastname: Venturato
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000523:psychology*; D005260:Female; D006801:Humans; D008134:Long-Term Care; D008297:Male; D009735:Nursing Homes; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires