Dual Task Performance Is Associated with Amyloidosis in Cognitively Healthy Adults
- 1 January 2022
- journal article
- research article
- Published by SERDI in The Journal Of Prevention of Alzheimer's Disease
- Vol. 9 (2), 297-305
- https://doi.org/10.14283/jpad.2022.1
Abstract
Background Preclinical Alzheimer's disease (AD) provides an opportunity for the study and implementation of interventions and strategies aimed at delaying, mitigating, and preventing AD. While this preclinical state is an ideal target, it is difficult to identify efficiently and cost-effectively. Recent findings have suggested that cognitive-motor dual task paradigms may provide additional inference. Objectives Investigate the relationship between dual task performance and amyloidosis, suggestive of preclinical Alzheimer's disease and whether dual task performance provides additional information beyond a cognitive composite, to help in the identification of amyloidosis. Design Cross-sectional. Setting Outpatient specialty brain health clinical research institution in the United States. Participants 52 cognitively healthy adults. Measurements The data included demographics, amyloid standardized uptake value ratio obtained via florbetapir-PET, neuropsychological testing, apolipoprotien E genotype, and dual task performance measures. Data were analyzed via hierarchal multiple linear regression or logistic regression, controlling for age, education, and apolipoprotien E genotype. Receiver operating characteristic curves were plotted, and sensitivity and specificity calculated via 2x2 contingency tables. Results There was a moderate relationship (rs>.30) between motor and cognitive dual task effects and amyloid standardized uptake value ratio (ps<.042). A strong relationship (r=.58) was found between combined dual task effect, a measure of automaticity derived from dual task performance, and amyloid standardized uptake value ratio (p<.001). Additionally, combined dual task effect showed promise in its unique contributions to amyloid standardized uptake value ratio, accounting for 7.8% of amyloid standardized uptake value ratio variance beyond cognitive composite scores (p=.018). Additionally, when incorporated into the cognitive composite, combined dual task effect resulted in improved diagnostic accuracy for determining elevated amyloid standardized uptake value ratio, and increased the sensitivity and specificity of the cognitive composite. Conclussion Dual task performance using the combined dual task effect, a measure of automaticity, was a moderate predictor of cerebral amyloidosis, which suggests that it has utility in the screening and diagnosis of individuals for preclinical AD. Additionally, when combined with the cognitive composite, the combined dual task effect improves diagnostic accuracy. Further research is warranted.Keywords
This publication has 47 references indexed in Scilit:
- Moving towards early clinical trials for amyloid-targeted therapy in Alzheimer's diseaseNature Reviews Drug Discovery, 2013
- Tracking pathophysiological processes in Alzheimer's disease: an updated hypothetical model of dynamic biomarkersThe Lancet Neurology, 2013
- Clinical and Biomarker Changes in Dominantly Inherited Alzheimer's DiseaseThe New England Journal of Medicine, 2012
- Using PET with 18F-AV-45 (florbetapir) to quantify brain amyloid load in a clinical environmentEuropean Journal of Nuclear Medicine and Molecular Imaging, 2012
- An operational approach to National Institute on Aging–Alzheimer's Association criteria for preclinical Alzheimer diseaseAnnals of Neurology, 2011
- Effects of instructed focus and task difficulty on concurrent walking and cognitive task performance in healthy young adultsExperimental Brain Research, 2010
- Frequent Amyloid Deposition Without Significant Cognitive Impairment Among the ElderlyArchives of Neurology, 2008
- The role of executive function and attention in gaitMovement Disorders, 2007
- Neuropathology of older persons without cognitive impairment from two community-based studiesNeurology, 2006
- The Inconsistency of “Optimal” Cutpoints Obtained using Two Criteria based on the Receiver Operating Characteristic CurveAmerican Journal of Epidemiology, 2006