Dementia

Dementia is a clinical syndrome characterized by acquired decline in cognitive abilities—such as memory, reasoning, language, or executive function—sufficient to impair everyday functioning. It is associated with diverse underlying disorders, including neurodegenerative diseases such as Alzheimer’s disease, and may occur alongside conditions such as type 2 diabetes and depression. Mild cognitive impairment can precede dementia but does not invariably progress to it. Dementia is biologically heterogeneous, and research therefore examines subtype-specific patterns, neurodegeneration, genetic susceptibility, and biomarkers such as plasma measures and amyloid beta (Aβ).

Current work spans prediction, prevention, diagnosis, and long-term care. Blood-based biomarkers, cohort surveillance, Cox proportional hazards models, and artificial intelligence are being studied to improve risk estimation and earlier detection, with sensitivity and specificity being important measures of performance. Education has been investigated in relation to dementia incidence and genetic risk, while other research addresses personalised care planning, communication, informal caregiver burden, home-based support, and mHealth tools. These approaches complement symptomatic management, including consideration of cholinergic mechanisms and acetylcholinesterase (AChE), but the available studies do not establish a single preferred predictor, intervention, or care model.