Evidence map›Paper›PMID 33390174›Full record

Observational studyTranslational neurodegeneration2021

Neuropsychiatric symptoms are early indicators of an upcoming metabolic decline in Alzheimer's disease.

Kok Pin Ng, Tharick A Pascoal, Sulantha Mathotaarachchi, Yiong Huak Chan, Lai Jiang, Joseph Therriault, Andrea L Benedet, Monica Shin, Nagaendran Kandiah, Celia M T Greenwood and 3 more

Open access · goldAbstract readObservational Study
In one paragraph

Observational study in Translational neurodegeneration, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
3.7field-weighted citation impact, top 6% 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 44 citations in OpenAlex.

  1. Pooled it
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  8. Impaired sleep is associated with tau deposition onJournal of the neurological sciences · 2024
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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

13 authors at 4 institutions in 2 countries.

Kok Pin NgAlzheimer's Disease Research Unit, McGill Centre for Studies in Aging, McGill University, Montréal, Québec, Canada.
Tharick A PascoalAlzheimer's Disease Research Unit, McGill Centre for Studies in Aging, McGill University, Montréal, Québec, Canada.
Sulantha MathotaarachchiAlzheimer's Disease Research Unit, McGill Centre for Studies in Aging, McGill University, Montréal, Québec, Canada.
Yiong Huak ChanBiostatistics Unit, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore.
Lai JiangLady Davis Institute, McGill University, Montreal, Canada.
Joseph TherriaultAlzheimer's Disease Research Unit, McGill Centre for Studies in Aging, McGill University, Montréal, Québec, Canada.
Andrea L BenedetAlzheimer's Disease Research Unit, McGill Centre for Studies in Aging, McGill University, Montréal, Québec, Canada.
Monica ShinAlzheimer's Disease Research Unit, McGill Centre for Studies in Aging, McGill University, Montréal, Québec, Canada.
Nagaendran KandiahDepartment of Neurology, National Neuroscience Institute, Singapore City, Singapore.
Celia M T GreenwoodLady Davis Institute, McGill University, Montreal, Canada.
Pedro Rosa-NetoAlzheimer's Disease Research Unit, McGill Centre for Studies in Aging, McGill University, Montréal, Québec, Canada.
Serge GauthierAlzheimer's Disease Research Unit, McGill Centre for Studies in Aging, McGill University, Montréal, Québec, Canada. serge.gauthier@mcgill.ca.
Dominantly Inherited Alzheimer Network
McGill University · CANational Neuroscience Institute · SGNational University of Singapore · SGMcGill University Health Centre · CA

Funding

Imaging CoreU19AG032438 · NIA · WASHINGTON UNIVERSITY · PI BATEMAN, RANDALL J · 2010 to 2025
$53.9M
NIA NIH HHS U19 AG032438
6 · The paper itself

Abstract

backgroundNeuropsychiatric symptoms (NPS) are increasingly recognized as early non-cognitive manifestations in the Alzheimer's disease (AD) continuum. However, the role of NPS as an early marker of pathophysiological progression in AD remains unclear. Dominantly inherited AD (DIAD) mutation carriers are young individuals who are destined to develop AD in future due to the full penetrance of the genetic mutation. Hence, the study of DIAD mutation carriers enables the evaluation of the associations between pure AD pathophysiology and metabolic correlates of NPS without the confounding effects of co-existing pathologies. In this longitudinal study, we aimed to identify regional brain metabolic dysfunctions associated with NPS in cognitively intact DIAD mutation carriers.

methodsWe stratified 221 cognitively intact participants from the Dominantly Inherited Alzheimer's Network according to their mutation carrier status. The interactions of NPS measured by the Neuropsychiatric Inventory-Questionnaire (NPI-Q), age, and estimated years to symptom onset (EYO) as a function of metabolism measured by [

resultsA total of 119 mutation carriers and 102 non-carriers were studied. The interaction of higher NPI-Q and shorter EYO was associated with more rapid declines of global and regional [

conclusionsThe NPS in cognitively intact DIAD mutation carriers may be a clinical indicator of subsequent metabolic decline in brain networks vulnerable to AD, which supports the emerging conceptual framework that NPS represent early manifestations of neuronal injury in AD. Further studies using different methodological approaches to identify NPS in preclinical AD are needed to validate our findings.

Indexed as

AdultAgedAge of OnsetAlzheimer DiseaseDisease ProgressionFactor Analysis, StatisticalFemaleFluorodeoxyglucose F18HeterozygoteHumansLongitudinal StudiesMaleMental DisordersMiddle AgedMutationNervous System DiseasesFluorodeoxyglucose F18RadiopharmaceuticalsDominantly inherited Alzheimer’s diseaseMetabolic correlatesNeuropsychiatric symptoms

Identifiers

PMID33390174
PMCPMC7780680
OpenAlexW3112455821

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.