[Mild cognitive impairment and development of dementia]
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Updated: Jul 5, 2026

A Machine Learning Approach to Design an Efficient Selective Screening of Mild Cognitive Impairment
Published on: January 11, 2020
Tobias Luck1, Anja Busse, Anke Hensel
1Universität Leipzig, Zentrum für Psychische Gesundheit, Klinik und Poliklinik für Psychiatrie, Abteilung Public Health. Semmelweisstrasse 10, 04103 Leipzig. Tobias.Luck@medizin.uni-leipzig.de
Objective:
In order to identify mildly cognitively impaired subjects, MILD COGNITIVE IMPAIRMENT: (MCI) represents a current and well-discussed concept. Prevalence and conversion rates, relative risks and data on the sensitivity and specifity of MCI for the development of dementia will be calculated.
Methods:
980 subjects aged 75 years and over who participated in the Leipzig Longitudinal Study of the Aged (LEILA 75+) were clinically interviewed and cognitively tested at regularly intervals over a mean period of six years.
Results:
At baseline, the prevalence of MCI was 19.3 %, including (original) and 41.5 % excluding (modified) the criterion of subjective cognitive complaints. Diagnoses of original and modified amnestic MCI-subtypes were associated with relative risks of more than three for the development of dementia.
Conclusions:
MCI represents a risk factor for dementia, mainly if the cognitive impairments are related to the area of memory. However, in order to predict dementia reliably, further findings (e. g. biomarkers) are required.
Insights
Mild cognitive impairment (MCI) is a significant risk factor for dementia, particularly when memory is affected. Further research, including biomarkers, is needed for reliable dementia prediction.
Area of Science:
- Gerontology
- Neurology
- Cognitive Science
Context:
- Mild cognitive impairment (MCI) is a recognized concept for identifying individuals at risk of cognitive decline.
- The Leipzig Longitudinal Study of the Aged (LEILA 75+) investigated MCI prevalence and progression in older adults.
Purpose:
- To calculate the prevalence and conversion rates of MCI.
- To determine the relative risks and diagnostic accuracy (sensitivity and specificity) of MCI for dementia development.
Summary:
- The study found MCI prevalence rates of 19.3% (original criteria) and 41.5% (modified criteria) in 980 subjects aged 75+.
- Both original and modified amnestic MCI subtypes showed over a threefold increased risk for dementia development.
- Memory-related cognitive impairments in MCI are particularly indicative of future dementia risk.
Impact:
- MCI serves as a crucial risk factor for dementia, especially when memory functions are impaired.
- The findings highlight the need for additional biomarkers to enhance the reliability of dementia prediction in MCI patients.
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