Related Experiment Video
Updated: May 26, 2026

A Machine Learning Approach to Design an Efficient Selective Screening of Mild Cognitive Impairment
Published on: January 11, 2020
Mild cognitive impairment and dementia: the importance of modifiable risk factors
Thorleif Etgen1, Dirk Sander, Horst Bickel
1Klinik und Poliklinik für Psychiatrie und Psychotherapie, Technische Universität München, Germany. thorleif.etgen@klinikum-traunstein.de
Background:
Mild cognitive impairment (MCI), a common condition among the elderly, is defined as a deterioration of memory, attention, and cognitive function that exceeds what would be expected for the individual's age and level of education, yet does not interfere significantly with the activities of daily living. MCI may be a precursor of dementia; the rate of transition from MCI to dementia is 10% to 20% per year. The role of somatic diseases and modifiable risk factors in MCI and dementia needs further study.
Methods:
We analyzed pertinent original articles and reviews published 1990 up to December 2010 that were retrieved by a selective search in PubMed and the Cochrane Library.
Results:
MCI and dementia are associated with many somatic disorders and modifiable risk factors. MCI has biologically plausible associations with hypertension, diabetes mellitus, and hyperlipidemia, although the interventional trials performed to date have yielded negative results. Recently, chronic renal failure has also been recognized as a risk factor. Insufficient evidence supports a putative benefit on MCI from the substitution of vitamin B12, vitamin D, or testosterone (when these substances are deficient), the treatment of hyperhomocysteinemia or subclinical thyroid dysfunction, or hormone replacement therapy after menopause. Epidemiological data suggest that a Mediterranean diet, physical activity, and moderate alcohol consumption protect against MCI, while cigarette smoking promotes it and should be stopped.
Conclusion:
Modifiable risk factors for MCI should be sought (at the very latest) in persons who already have MCI, as their optimal treatment may improve these patients' cognitive performance or keep the existing deficits from progressing.
Insights
Identifying and treating modifiable risk factors for mild cognitive impairment (MCI) is crucial. Addressing these factors in individuals with MCI may improve cognitive function and prevent further decline.
Area of Science:
- Gerontology
- Neurology
- Public Health
Background:
- Mild cognitive impairment (MCI) is a decline in cognitive function in the elderly, potentially preceding dementia.
- The transition rate from MCI to dementia is 10-20% annually.
- Further research into somatic diseases and modifiable risk factors for MCI and dementia is needed.
Purpose of the Study:
- To review the association between somatic diseases, modifiable risk factors, and mild cognitive impairment (MCI).
- To evaluate the current evidence on interventions for MCI and its risk factors.
Main Methods:
- A selective literature search was conducted in PubMed and the Cochrane Library.
- Pertinent original articles and reviews published between 1990 and December 2010 were analyzed.
Main Results:
- MCI is linked to hypertension, diabetes mellitus, hyperlipidemia, and chronic renal failure.
- Interventions for vitamin deficiencies, hyperhomocysteinemia, subclinical thyroid dysfunction, and hormone replacement therapy showed insufficient evidence of benefit.
- A Mediterranean diet, physical activity, and moderate alcohol consumption may protect against MCI, while smoking is a risk factor.
Conclusions:
- Modifiable risk factors for MCI should be identified and managed, particularly in individuals already diagnosed with MCI.
- Optimal treatment of these factors may enhance cognitive performance or slow cognitive decline in MCI patients.
Related Concept Videos
Alzheimer Disease l: Introduction
Dementia l: Introduction
Dementia
The progression of dementia is generally gradual.
Alzheimer's Disease: Overview
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
Alzheimer Disease ll: Pathophysiology
Cognitive Development During Adulthood
