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Observational Study of Clinical and Functional Progression Based on Initial Brain MRI Characteristics in Patients
Hojin Choi1, YoungSoon Yang2, Hyun Jeong Han3
1Department of Neurology, Hanyang University College of Medicine, Seoul, Korea.
Background:
Magnetic resonance imaging (MRI) is a useful tool to predict the diagnosis and progression of Alzheimer's disease (AD), especially for primary physicians. However, the correlation between baseline MRI findings and AD progression has not been fully established.
Objective:
To investigate the correlation between hippocampal atrophy (HA) and white matter hyperintensities (WMH) on initial brain MRI images and the degree of cognitive decline and functional changes over 1 year.
Methods:
In this prospective, 12-month observational study, dementia outpatients were recruited from 29 centers across South Korea. Baseline assessments of HA and WMH on baseline brain MRI were derived as well as cognitive function, dementia severity, activities of daily living, and acetylcholinesterase inhibitor (AChEI) use. Follow-up assessments were conducted at 6 and 12 months.
Results:
Among 899 enrolled dementia patients, 748 were diagnosed with AD of whom 654 (87%) were taking AChEIs. Baseline WMH showed significant correlations with age, current alcohol consumption, and Clinical Dementia Rating score; baseline HA was correlated with age, family history, physical exercise, and the results of cognitive assessments. Among the AChEI group, changes in the Korean version of the Instrumental Activities of Daily Living (K-IADL) were correlated with the severity of HA on baseline brain MRI, but not with the baseline severity of WMH. In the no AChEI group, changes in K-IADL were correlated with the severity of WMH and HA at baseline.
Conclusion:
Baseline MRI findings could be a useful tool for predicting future clinical outcomes by primary physicians, especially in relation to patients' functional status.
Insights
Baseline brain MRI findings like hippocampal atrophy and white matter hyperintensities can help predict Alzheimer's disease progression and functional decline in patients over one year.
Area of Science:
- Neurology
- Radiology
- Geriatrics
Background:
- Magnetic resonance imaging (MRI) is valuable for predicting Alzheimer's disease (AD) diagnosis and progression, particularly for primary care physicians.
- However, the link between initial MRI results and the disease's advancement requires further clarification.
Purpose of the Study:
- To determine the relationship between hippocampal atrophy (HA) and white matter hyperintensities (WMH) on baseline brain MRI scans and subsequent 1-year changes in cognitive and functional status.
- To assess the predictive value of these MRI markers for cognitive decline and functional changes in dementia patients.
Main Methods:
- A prospective, 12-month observational study involving dementia outpatients from 29 centers in South Korea.
- Baseline brain MRI assessments for HA and WMH, alongside cognitive function, dementia severity, daily living activities, and acetylcholinesterase inhibitor (AChEI) use.
- Follow-up assessments at 6 and 12 months to track changes.
Main Results:
- Of 899 dementia patients, 748 had AD; 654 used AChEIs. Baseline WMH correlated with age, alcohol use, and dementia severity.
- Baseline HA correlated with age, family history, exercise, and cognitive test results.
- In AChEI users, functional decline (K-IADL) correlated with baseline HA. In non-users, decline correlated with both baseline WMH and HA.
Conclusions:
- Initial MRI findings, specifically HA and WMH, are useful for predicting future clinical outcomes in dementia patients.
- These MRI markers are particularly relevant for assessing changes in patients' functional status over time.
- Primary physicians can leverage baseline MRI data to better anticipate patient progression and functional changes.