Journal
DEMENTIA AND GERIATRIC COGNITIVE DISORDERS
Volume 27, Issue 1, Pages 50-58Publisher
KARGER
DOI: 10.1159/000189267
Keywords
Cognitive change; Reliable Change Index; Mini Mental State Examination; Diagnostic accuracy
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Funding
- Interdisziplin res Zentrum fur Klinische Forschung (IZKF) Leipzig [C07]
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Background/Aim: Norms for change in Mini Mental State Examination (MMSE) total score suggest that only a decline of at least 2-4 points indicates a reliable change. However, it is unknown whether change norms (Reliable Change Indices, RCIs) of the MMSE total score are suitable to predict future dementia. Methods: 554 elderly individuals aged 75 and over without dementia at the first 2 visits were tested with the MMSE at a maximum of 6 visits with 1.5-year intervals. Two different RCIs for change in MMSE score (first to second visit) were computed - one RCI which corrects for practice and one RCI which corrects for regression to the mean. The main outcome measure was the diagnosis of dementia. Results: During the study, 88 persons developed dementia. RCIs were significantly associated with future dementia diagnosis. The best cutoff for raw change in MMSE total score to predict dementia was -1 point ( sensitivity = 48%, specificity = 67%, relative risk = 1.6). With the RCI + regression to the mean, the diagnostic accuracy was moderate ( sensitivity = 61%, specificity = 72%, relative risk = 3.2). Conclusion: A change in MMSE total score is significantly associated with future dementia, but the diagnostic accuracy for dementia prediction is rather low. Copyright (c) 2009 S. Karger AG, Basel
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