Abstract |
The Daily Activities Questionnaire ( DAQ) was developed to assess activities of daily living ( ADL) independence in people with Alzheimer's disease. After administering it to 276 people diagnosed with Alzheimer's disease, we examined the quality of the rating scale and its structure using a Rasch measurement approach. Results indicated that the original 10-point rating scale should be restructured to a 5-point rating scale to improve the quality of the instrument. In addition, we found that all but two ADL items defined the same construct and could be combined into a single summary measure of ADL independence. The remaining items were positioned along a hierarchical continuum, with IADL tasks more difficult than PADL tasks. Furthermore, the tasks were logically ordered by difficulty. We therefore report that the DAQ is a valid scale and conclude that it is a viable measure of ADL independence for studies of Alzheimer's disease.
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Authors | F Oakley, J S Lai, T Sunderland |
Journal | Journal of outcome measurement
(J Outcome Meas)
Vol. 3
Issue 4
Pg. 297-307
( 1999)
ISSN: 1090-655X [Print] United States |
PMID | 10572383
(Publication Type: Journal Article)
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Topics |
- Activities of Daily Living
- Aged
- Aged, 80 and over
- Alzheimer Disease
(physiopathology)
- Data Interpretation, Statistical
- Female
- Humans
- Male
- Middle Aged
- Psychometrics
(methods)
- Surveys and Questionnaires
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