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A Machine Learning Approach to Design an Efficient Selective Screening of Mild Cognitive Impairment
Published on: January 11, 2020
Alzheimer disease biomarkers and insights into mild cognitive impairment
1Alzheimer's Disease Research Center and Department of Neurology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA. knopman@mayo.edu
Abstract:
Persons with mild cognitive impairment (MCI) have overt changes in thinking and memory, but they are still largely independent in daily affairs. They have a far higher rate of developing dementia (progressing to a more debilitating state of cognitive impairment) than cognitively normal persons, but at the individual patient level, prognosis is variable. Sometimes persons with MCI do not worsen and a few even revert back to cognitive normality.(1,2) The variable prognosis in MCI is one reason why the term "MCI" has caught on: not only does it denote a sense of severity at the mildest level, it also conveys uncertainty of prognosis. Identification of the subset of patients with MCI at highest risk to progress to more severe cognitive impairment is a very important goal for research and future clinical care. Quantitating the degree of cognitive impairment by traditional history-taking, brief mental status testing, and more detailed neuropsychological assessment are necessary and informative first steps. However, knowledge of cognitive and functional status in MCI still leaves much uncertainty regarding the ability to predict worsening.
Insights
Mild cognitive impairment (MCI) presents variable prognoses, with some individuals progressing to dementia and others improving. Identifying those at highest risk is crucial for effective research and clinical care.
Area of Science:
- Neurology
- Gerontology
- Cognitive Science
Background:
- Mild cognitive impairment (MCI) is characterized by noticeable changes in thinking and memory, yet individuals remain largely independent in daily activities.
- MCI patients exhibit a significantly higher risk of progressing to dementia compared to cognitively normal individuals, though prognosis varies at the individual level.
- Some individuals with MCI may not experience worsening of symptoms, and a subset may even revert to cognitive normality.
Discussion:
- The inherent uncertainty in MCI prognosis contributes to its clinical recognition and the term's widespread adoption.
- Accurately predicting which MCI patients are most likely to develop severe cognitive impairment is a critical research objective.
- While traditional assessments like history, mental status tests, and neuropsychological evaluations are informative, they still leave uncertainty in predicting disease progression.
Key Insights:
- Mild cognitive impairment (MCI) is a transitional stage with unpredictable outcomes, ranging from stability to dementia progression or even recovery.
- Identifying individuals with MCI who are at high risk for dementia is a significant challenge in clinical practice and research.
- Current diagnostic methods for MCI provide a baseline but are insufficient for precise prognostic predictions.
Outlook:
- Future research should focus on developing more accurate biomarkers and predictive models to identify MCI patients at high risk of dementia.
- Improved prognostic tools will enable personalized interventions and more effective management strategies for individuals with MCI.
- Understanding the factors influencing MCI progression is essential for developing targeted therapies to prevent or delay dementia onset.
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