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Alzheimer's Research & Therapy
Published in: Alzheimer's Research & Therapy 1/2018

Open Access 01-12-2018 | Research

Brain and cognitive correlates of subjective cognitive decline-plus features in a population-based cohort

Authors: Gonzalo Sánchez-Benavides, Oriol Grau-Rivera, Marc Suárez-Calvet, Carolina Minguillon, Raffaele Cacciaglia, Nina Gramunt, Carles Falcon, Juan Domingo Gispert, José Luis Molinuevo, ALFA Study

Published in: Alzheimer's Research & Therapy | Issue 1/2018

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Abstract

Background

Subjective cognitive decline (SCD) consists of self-perceived decline in cognition over time. The occurrence of specific additional features in SCD (so-called SCDplus) confers a higher risk of future cognitive decline. However, it is not known whether SCDplus patients have a distinct cognitive and neuroimaging profile. Therefore, we aimed to study the associations between SCDplus features and cognitive and neuroimaging profiles in a population-based cohort.

Methods

A total of 2670 individuals from the ALFA cohort underwent clinical, cognitive, and MRI (n = 532) explorations. Subjects were classified as self-reporting cognitive decline (SCD) or not self-reporting cognitive decline (non-SCD). Within the SCD group, participants were also classified according to the number of SCDplus features they met (SCD+, > 3; SCD–, ≤ 3).

Results

The prevalence of SCD in the cohort was 21.4% (55.8% SCD–, 44.2% SCD+). SCD+ subjects performed worse than non-SCD and SCD– subjects in memory and executive function. Among the SCDplus features, confirmation of decline by an informant was the best predictor of worse cognitive performance and lower gray matter volumes.

Conclusions

Our findings show that individuals with SCDplus features have a distinct cognitive and brain volumetric profile similar to that found in Alzheimer’s disease and therefore support the use of the SCDplus concept as an enrichment criterion in population-based cohorts.
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Metadata
Title
Brain and cognitive correlates of subjective cognitive decline-plus features in a population-based cohort
Authors
Gonzalo Sánchez-Benavides
Oriol Grau-Rivera
Marc Suárez-Calvet
Carolina Minguillon
Raffaele Cacciaglia
Nina Gramunt
Carles Falcon
Juan Domingo Gispert
José Luis Molinuevo
ALFA Study
Publication date
01-12-2018
Publisher
BioMed Central
Published in
Alzheimer's Research & Therapy / Issue 1/2018
Electronic ISSN: 1758-9193
DOI
https://doi.org/10.1186/s13195-018-0449-9

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