Evidence map›Paper›PMID 26402771›Full record

ArticleJournal of Alzheimer's disease : JAD2015

Subtle Cognitive Decline and Biomarker Staging in Preclinical Alzheimer's Disease.

Emily C Edmonds, Lisa Delano-Wood, Douglas R Galasko, David P Salmon, Mark W Bondi, Alzheimer’s Disease Neuroimaging Initiative

Open access · bronzeAbstract read
In one paragraph

Article in Journal of Alzheimer's disease : JAD, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 110 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
110citing papers in PubMed, 5 pooled it
9.0field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

110 citing papers in PubMed, 5 syntheses or guidelines pooled it, 195 citations in OpenAlex.

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  15. Development and Preliminary Validation of Standardized Regression-Based Change Scores as Measures of Transitional Cognitive Decline.Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists · 2025
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50 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Emily C EdmondsDepartment of Psychiatry, University of California San Diego, School of Medicine, La Jolla, CA, USA.
Lisa Delano-WoodDepartment of Psychiatry, University of California San Diego, School of Medicine, La Jolla, CA, USA.
Douglas R GalaskoDepartment of Psychiatry, University of California San Diego, School of Medicine, La Jolla, CA, USA.
David P SalmonDepartment of Neurosciences, University of California San Diego, School of Medicine, La Jolla, CA, USA.
Mark W BondiDepartment of Psychiatry, University of California San Diego, School of Medicine, La Jolla, CA, USA.
Alzheimer’s Disease Neuroimaging Initiative
University of California San Diego · US

Funding

Alzheimer's Disease Neuroimaging Initiative - SupplementU01AG024904 · NIA · NORTHERN CALIFORNIA INSTITUTE RES &EDUC · PI WEINER, MICHAEL W · 2004 to 2015
$121.0M
VIRUS-INDUCED BRAIN PATHOLOGYP50AG005131 · NIA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI GALASKO, DOUGLAS R · 1985 to 2018
$55.4M
FELLOWSHIP IN GERIATRIC MENTAL HEALTHT32MH019934 · NIMH · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI Elizabeth W Twamley · 1994 to 2026
$9.5M
Re-visiting Methods for MCI Diagnosis to Improve Biomarker and Trial FindingsR01AG049810 · NIA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI BONDI, MARK W, EDLAND, STEVEN DYAL · 2016 to 2020
$3.7M
Cognitive Abilities of At-Risk Elderly for DementiaR01AG012674 · NIA · VETERANS MEDICAL RESEARCH FDN/SAN DIEGO · PI BONDI, MARK W · 2001 to 2012
$2.7M
Neuroimaging and Risk Factor Correlates in Aging and MCIK24AG026431 · NIA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI BONDI, MARK W · 2007 to 2016
$1.7M
Canadian Institutes of Health ResearchNIA NIH HHS K24 AG026431NIA NIH HHS P50 AG005131NIA NIH HHS P50 AG05131NIA NIH HHS R01 AG012674NIA NIH HHS R01 AG049810NIA NIH HHS U01 AG024904NIMH NIH HHS T32 MH019934
6 · The paper itself

Abstract

The NIA-AA criteria for "preclinical" Alzheimer's disease (AD) propose a staging method in which AD biomarkers follow an invariable temporal sequence in accordance with the amyloid cascade hypothesis. However, recent findings do not align with the proposed temporal sequence and "subtle cognitive decline," which has not been definitively operationalized, may occur earlier than suggested in preclinical AD. We aimed to define "subtle cognitive decline" using sensitive and reliable neuropsychological tests, and to examine the number and sequence of biomarker abnormalities in the Alzheimer's Disease Neuroimaging Initiative (ADNI). 570 cognitively normal ADNI participants were classified based on NIA-AA criteria and separately based on the number of abnormal biomarkers/cognitive markers associated with preclinical AD that each individual possessed. Results revealed that neurodegeneration alone was 2.5 times more common than amyloidosis alone at baseline. For those who demonstrated only one abnormal biomarker at baseline and later progressed to mild cognitive impairment/AD, neurodegeneration alone was most common, followed by amyloidosis alone or subtle cognitive decline alone, which were equally common. Findings suggest that most individuals do not follow the temporal order proposed by NIA-AA criteria. We provide an operational definition of subtle cognitive decline that captures both cognitive and functional decline. Additionally, we offer a new approach for staging preclinical AD based on number of abnormal biomarkers, without regard to their temporal order of occurrence. This method of characterizing preclinical AD is more parsimonious than the NIA-AA staging system and does not presume that all patients follow a singular invariant expression of the disease.

Indexed as

Disease ProgressionProdromal SymptomsAgedAged, 80 and overAlzheimer DiseaseAmyloidosisBiomarkersCognition DisordersFemaleHumansLongitudinal StudiesMaleMiddle AgedNerve DegenerationNeuroimagingNeuropsychological TestsBiomarkersAlzheimer’s diseaseAlzheimer’s Disease Neuroimaging Initiativeamyloidbiomarkerscerebrospinal fluiddementianeurodegenerationneuropsychologypreclinical Alzheimer’s diseasesubtle cognitive decline

Identifiers

PMID26402771
PMCPMC4634634
OpenAlexW2099360540

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.