Abstract
The MCI construct aims to investigate the grey area existing between normal aging and dementia, in order to identify in the preclinical stage patients at risk of developing dementia. The construct of the MCI has been proposed by taking the neuropathological staging of the Alzheimers disease (AD) as reference and providing an explicit set of identifying criteria, but it has raised two main problems: (a) the variability of estimates concerning the actual rate of conversion from MCI to dementia, and (b) the number of subjects who return to normality. These problems stem in part from the operational difficulties met by the MCI identifying criteria concerned with: the memory tests used, the cut-off adopted to identify patients with an ‘objective’ memory disorder, the assessment of subjective memory disorders, and the integrity of daily living activities. After a short discussion of these operational difficulties, I will pass to shortly survey the laboratory data providing additional predictive value for the conversion of MCI to dementia (ApoE4, CSF biomarkers, Neuroimaging data, and Vascular risk factors) and some recent attempts to identify pre-MCI patients, with a purely subjective cognitive impairment. I will conclude my review by asking if we have a single MCI or a family of MCI constructs, each of whom could play a preferential role in specific clinical contexts.
Keywords: Conversion to dementia, return to normality, delayed recall, cut-off points, subjective memory disorders, daily living activities, subjective cognitive impairment
Current Alzheimer Research
Title: Origins, Controversies and Recent Developments of the MCI Construct
Volume: 7 Issue: 3
Author(s): G. Gainotti
Affiliation:
Keywords: Conversion to dementia, return to normality, delayed recall, cut-off points, subjective memory disorders, daily living activities, subjective cognitive impairment
Abstract: The MCI construct aims to investigate the grey area existing between normal aging and dementia, in order to identify in the preclinical stage patients at risk of developing dementia. The construct of the MCI has been proposed by taking the neuropathological staging of the Alzheimers disease (AD) as reference and providing an explicit set of identifying criteria, but it has raised two main problems: (a) the variability of estimates concerning the actual rate of conversion from MCI to dementia, and (b) the number of subjects who return to normality. These problems stem in part from the operational difficulties met by the MCI identifying criteria concerned with: the memory tests used, the cut-off adopted to identify patients with an ‘objective’ memory disorder, the assessment of subjective memory disorders, and the integrity of daily living activities. After a short discussion of these operational difficulties, I will pass to shortly survey the laboratory data providing additional predictive value for the conversion of MCI to dementia (ApoE4, CSF biomarkers, Neuroimaging data, and Vascular risk factors) and some recent attempts to identify pre-MCI patients, with a purely subjective cognitive impairment. I will conclude my review by asking if we have a single MCI or a family of MCI constructs, each of whom could play a preferential role in specific clinical contexts.
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Cite this article as:
Gainotti G., Origins, Controversies and Recent Developments of the MCI Construct, Current Alzheimer Research 2010; 7 (3) . https://dx.doi.org/10.2174/156720510791050858
DOI https://dx.doi.org/10.2174/156720510791050858 |
Print ISSN 1567-2050 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5828 |
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