Assessment of Alzheimer-related pathologies of dementia using machine learning feature selection

Rajab, Mohammed D.; Jammeh, Emmanuel; Taketa, Teruka; Brayne, Carol; Matthews, Fiona E.; Su, Li; Ince, Paul G.; Wharton, Stephen B.; Wang, Dennis

Abstract

Although a variety of brain lesions may contribute to the pathological assessment of dementia, the relationship of these lesions to dementia, how they interact and how to quantify them remains uncertain. Systematically assessing neuropathological measures by their degree of association with dementia may lead to better diagnostic systems and treatment targets. This study aims to apply machine learning approaches to feature selection in order to identify critical features of Alzheimer-related pathologies associated with dementia. We applied machine learning techniques for feature ranking and classification to objectively compare neuropathological features and their relationship to dementia status during life using a cohort (n=186) from the Cognitive Function and Ageing Study (CFAS). We first tested Alzheimer’s Disease and tau markers and then other neuropathologies associated with dementia. Seven feature ranking methods using different information criteria consistently ranked 22 out of the 34 neuropathology features for importance to dementia classification. Although highly correlated, Braak neurofibrillary tangle stage, beta-amyloid and cerebral amyloid angiopathy features were ranked the highest. The best-performing dementia classifier using the top eight neuropathological features achieved 79% sensitivity, 69% specificity and 75% precision. However, when assessing all seven classifiers and the 22 ranked features, a substantial proportion (40.4%) of dementia cases was consistently misclassified. These results highlight the benefits of using machine learning to identify critical indices of plaque, tangle and cerebral amyloid angiopathy burdens that may be useful for classifying dementia.

Citation

Rajab, M. D., Jammeh, E., Taketa, T., Brayne, C., Matthews, F. E., Su, L., …Wang, D. (2023). Assessment of Alzheimer-related pathologies of dementia using machine learning feature selection. Alzheimer's Research and Therapy, 15(1), Article 47. https://doi.org/10.1186/s13195-023-01195-9

• Journal Article Type: Article
• Acceptance Date: Feb 20, 2023
• Online Publication Date: Mar 10, 2023
• Publication Date: Dec 1, 2023
• Deposit Date: Jan 21, 2024
• Publicly Available Date: Jan 23, 2024
• Journal: Alzheimer's Research and Therapy
• Electronic ISSN: 1758-9193
• Publisher: BioMed Central
• Peer Reviewed: Peer Reviewed
• Volume: 15
• Issue: 1
• Article Number: 47
• DOI: https://doi.org/10.1186/s13195-023-01195-9
• Keywords: Dementia; Alzheimer’s; Feature selection; Machine learning; Neuropathology; Beta-amyloid
• Public URL: https://hull-repository.worktribe.com/output/4496258