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Memory concerns, memory performance and risk of dementia in patients with mild cognitive impairment

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Item Type:Article
Title:Memory concerns, memory performance and risk of dementia in patients with mild cognitive impairment
Creators Name:Wolfsgruber, S. and Wagner, M. and Schmidtke, K. and Froelich, L. and Kurz, A. and Schulz, S. and Hampel, H. and Heuser, I. and Peters, O. and Reischies, F.M. and Jahn, H. and Luckhaus, C. and Huell, M. and Gertz, H.J. and Schroeder, J. and Pantel, J and Rienhoff, O. and Ruether, E. and Henn, F. and Wiltfang, J. and Maier, W. and Kornhuber, J. and Jessen, F.
Abstract:BACKGROUND: Concerns about worsening memory ("memory concerns"; MC) and impairment in memory performance are both predictors of Alzheimer's dementia (AD). The relationship of both in dementia prediction at the pre-dementia disease stage, however, is not well explored. Refined understanding of the contribution of both MC and memory performance in dementia prediction is crucial for defining at-risk populations. We examined the risk of incident AD by MC and memory performance in patients with mild cognitive impairment (MCI). METHODS: We analyzed data of 417 MCI patients from a longitudinal multicenter observational study. Patients were classified based on presence (n = 305) vs. absence (n = 112) of MC. Risk of incident AD was estimated with Cox Proportional-Hazards regression models. RESULTS: Risk of incident AD was increased by MC (HR = 2.55, 95%CI: 1.33-4.89), lower memory performance (HR = 0.63, 95%CI: 0.56-0.71) and ApoE4-genotype (HR = 1.89, 95%CI: 1.18-3.02). An interaction effect between MC and memory performance was observed. The predictive power of MC was greatest for patients with very mild memory impairment and decreased with increasing memory impairment. CONCLUSIONS: Our data suggest that the power of MC as a predictor of future dementia at the MCI stage varies with the patients' level of cognitive impairment. While MC are predictive at early stage MCI, their predictive value at more advanced stages of MCI is reduced. This suggests that loss of insight related to AD may occur at the late stage of MCI.
Keywords:Alzheimer Disease, Apolipoprotein E4, Genotype, Longitudinal Studies, Memory, Mild Cognitive Impairment, Proportional Hazards Models, Risk
Source:PLoS ONE
Publisher:Public Library of Science
Page Range:e100812
Date:14 July 2014
Official Publication:https://doi.org/10.1371/journal.pone.0100812
PubMed:View item in PubMed

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