Evidence map›Paper›PMID 24130529›Full record

ArticleFrontiers in aging neuroscience2013

Index of alpha/theta ratio of the electroencephalogram: a new marker for Alzheimer's disease.

Magali T Schmidt, Paulo A M Kanda, Luis F H Basile, Helder Frederico da Silva Lopes, Regina Baratho, Jose L C Demario, Mario S Jorge, Antonio E Nardi, Sergio Machado, Jéssica N Ianof and 2 more

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Article in Frontiers in aging neuroscience, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

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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

45 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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4 · The record

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5 · Who and what money

Authors and funding

12 authors.

Magali T SchmidtDivision of Clinical Neurology, Referral Center for Cognitive Disorders, HCFMUSP , São Paulo , Brazil.
Paulo A M Kanda
Luis F H Basile
Helder Frederico da Silva Lopes
Regina Baratho
Jose L C Demario
Mario S Jorge
Antonio E Nardi
Sergio Machado
Jéssica N Ianof
Ricardo Nitrini
Renato Anghinah

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveWe evaluated quantitative EEG measures to determine a screening index to discriminate Alzheimer's disease (AD) patients from normal individuals.

methodsTwo groups of individuals older than 50 years, comprising a control group of 57 normal volunteers and a study group of 50 patients with probable AD, were compared. EEG recordings were obtained from subjects in a wake state with eyes closed at rest for 30 min. Logistic regression analysis was conducted.

resultsSpectral potentials of the alpha and theta bands were computed for all electrodes and the alpha/theta ratio calculated. Logistic regression of alpha/theta of the mean potential of the C3 and O1 electrodes was carried out. A formula was calculated to aid the diagnosis of AD yielding 76.4% sensitivity and 84.6% specificity for AD with an area under the ROC curve of 0.92.

conclusionLogistic regression of alpha/theta of the spectrum of the mean potential of EEG represents a good marker discriminating AD patients from normal controls.

Indexed as

alphaAlzheimer’s diseaseEEGlogistic regressiontheta

Identifiers

PMID24130529
PMCPMC3793211

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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.