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Updated: Jul 11, 2026

A Machine Learning Approach to Design an Efficient Selective Screening of Mild Cognitive Impairment
Published on: January 11, 2020
Mild cognitive impairment in general practice: age-specific prevalence and correlate results from the German study on
Tobias Luck1, Steffi G Riedel-Heller, Hanna Kaduszkiewicz
1Department of Psychiatry, University of Leipzig, Leipzig, Germany. tobias.luck@medizin.uni-leipzig.de
Background:
Although mild cognitive impairment (MCI) represents a high-risk factor for developing dementia, little is known about the prevalence of MCI among patients of general practitioners (GPs).
Aims:
Estimation of age-specific prevalence for original and modified concepts of MCI and their association with sociodemographic, medical and genetic (apoE epsilon4 genotype) factors among patients of GPs.
Methods:
A GP practice sample of 3,327 individuals aged 75+ was assessed by structured clinical interviews.
Results:
Prevalence was 15.4% (95% CI = 14.1-16.6) for original and 25.2% (95% CI = 23.7-26.7) for modified MCI. Rates increased significantly with older age. Positive associations were found for apoE epsilon4 allele, vascular diseases and depressive symptoms.
Conclusion:
MCI is frequent in elderly patients of GPs. GPs have a key position in secondary prevention and care of incipient cognitive deterioration up to the diagnosis of dementia.
Insights
Mild cognitive impairment (MCI) is common in elderly patients seen by general practitioners (GPs). Early detection by GPs is crucial for preventing dementia progression.
Area of Science:
- Gerontology
- Neurology
- General Practice
Background:
- Mild cognitive impairment (MCI) is a significant risk factor for dementia.
- Prevalence of MCI in general practitioner (GP) populations is not well-established.
Purpose of the Study:
- Estimate the prevalence of original and modified MCI concepts in GP patients.
- Investigate associations between MCI and sociodemographic, medical, and genetic factors (apoE ε4).
Main Methods:
- A cohort of 3,327 individuals aged 75+ from GP practices was studied.
- Structured clinical interviews were used for assessment.
Main Results:
- Prevalence rates for MCI were 15.4% (original) and 25.2% (modified).
- MCI prevalence increased with age.
- Associations found with apoE ε4 allele, vascular diseases, and depressive symptoms.
Conclusions:
- MCI is highly prevalent in elderly patients within primary care settings.
- GPs play a vital role in the secondary prevention and management of cognitive decline.
- Timely intervention by GPs can aid in delaying or preventing dementia.
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