Work

Examining the Cognitive Underpinnings of Functional Decline in Prodromal Alzheimer’s Disease: Insights From the Details of Functions of Everyday Life (DoFEL) Scale

Year: 2025

Type: article

Abstract: Available assessments for early‐stage Alzheimer’s disease (AD) identify neuropsychological and functional impairments, which rarely correlate in the early disease stages. The ability to bind information in memory declines in preclinical AD stages. However, it is unclear whether such cognitive deficits underlie functional impairment in prodromal AD stages. This study investigates whether incorporating memory binding, a function that is a sensitive cognitive marker for early‐stage AD, into a functional assessment tool can reveal the cognitive underpinnings of daily activities. The Details of Function of Everyday Life (DoFEL) scale was revised, and its latent structure was explored through principal axis factoring in a nonclinical sample ( n = 559). Dementia professionals subsequently reviewed the revised DoFEL for content validity, followed by confirmatory factor analysis in another nonclinical sample ( n = 135). Additionally, 49 participants with mild cognitive impairment (MCI) and 33 healthy controls completed the DoFEL, Addenbrooke’s Cognitive Examination‐Revised (ACE‐R) and a Visual Short‐Term Memory Binding Task (VSTMBT). Correlation analysis and binomial regression were used to examine the relationship between DoFEL scores and cognitive measures and to assess its ability to differentiate between healthy controls and MCI patients. The revised DoFEL showed satisfactory structural and construct validity, although some items lacked content validity. Significant negative associations were found between DoFEL scores and ACE‐R ( r = −0.66, p < 0.001) as well as VSTMBT ( r = −0.52, p = 0.003) performances. Binomial regression demonstrated the DoFEL’s effectiveness in distinguishing healthy controls from MCI patients (AUC = 0.95). These findings suggest that linking memory binding with functional performance could enhance functional assessment in early‐stage AD.

Source: Journal of Aging Research

DOI: 10.1155/jare/2610700

Authors: Freddie O’Donald, Clara Calia, Mario A. Parra

Institutions: National Health Service, NHS Tayside, University of Edinburgh, University of Strathclyde

Language: English

Topic: Dementia and Cognitive Impairment Research

Subfield: Psychiatry and Mental health

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $1,000