期刊
ALZHEIMER DISEASE & ASSOCIATED DISORDERS
卷 24, 期 4, 页码 348-353出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/WAD.0b013e3181e2fc84
关键词
mild cognitive impairment; dementia; Alzheimer disease; activities of daily living; standardized assessment
资金
- National Institute on Aging [P50 AG16570, U01 AG016976]
- National Alzheimer's Coordinating Center
- Alzheimer's Disease Research Centers of California
- Sidell-Kagan Foundation
Current criteria for mild cognitive impairment (MCI) require essentially intact performance of activities of daily living (ADLs), which has proven difficult to operationalize. We sought to determine how well the Functional Activities Questionnaire (FAQ), a standardized assessment of instrumental ADLs, delineates the clinical distinction between MCI and very mild Alzheimer disease (AD). We identified 1801 individuals in the National Alzheimer's Coordinating Center Uniform Data Set with MCI (n = 1108) or very mild AD (n = 693) assessed with the FAQ and randomized them to the development or test sets. Receiver-operator curve (ROC) analysis of the development set identified optimal cut-points that maximized the sensitivity and specificity of FAQ measures for differentiating AD from MCI and were validated with the test set. ROC analysis of total FAQ scores in the development set produced an area under the curve of 0.903 and an optimal cut-point of 5/6, which yielded 80.3% sensitivity, 87.0% specificity, and 84.7% classification accuracy in the test set. Bill paying, tracking current events, and transportation (P's < 0.005) were the FAQ items of greatest diagnostic utility. These data suggest that the FAQ exhibits adequate sensitivity and specificity when used as a standardized assessment of instrumental ADLs in the diagnosis of AD versus MCI.
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