Evidence map›Paper›PMID 24095154›Full record

ArticleClinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology2014

Prognostic value of EEG asymmetries for development of drug-resistance in drug-naïve patients with genetic generalized epilepsies.

Ioannis Karakis, Jay S Pathmanathan, Richard Chang, E Francis Cook, Sydney S Cash, Andrew J Cole

Abstract read
In one paragraph

Article in Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
0.4field-weighted citation impact, top 35% 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

6 citing papers in PubMed, 15 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Electroclinical spectrum of generalized paroxysmal fast activity in adults without epileptic encephalopathy.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
    Article
  6. White Matter Abnormalities in Patients with Treatment-Resistant Genetic Generalized Epilepsies.Medical science monitor : international medical journal of experimental and clinical research · 2016
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

Ioannis KarakisDepartment of Neurology, Emory University School of Medicine, Atlanta, GA, USA. Electronic address: ioannis.karakis@emory.edu.
Jay S PathmanathanMGH Epilepsy Service, Harvard Medical School, Boston, MA, USA.
Richard ChangMGH Epilepsy Service, Harvard Medical School, Boston, MA, USA.
E Francis CookHarvard School of Public Health, Boston, MA, USA.
Sydney S CashMGH Epilepsy Service, Harvard Medical School, Boston, MA, USA.
Andrew J ColeMGH Epilepsy Service, Harvard Medical School, Boston, MA, USA.
Harvard University · USEmory University · US

Funding

Neurophysiology of Human Cortical EpilepsyR01NS062092 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI CASH, SYDNEY S · 2010 to 2021
$4.7M
NINDS NIH HHS R01 NS062092
6 · The paper itself

Abstract

objectivePrevious studies based solely on visual EEG analysis reported equivocal results regarding an association of pharmaco-resistance with EEG asymmetries in genetic generalized epilepsies (GGE). We addressed this issue by applying both visual and quantitative methods to the pretreatment EEG of GGE patients.

methodsSocio-demographic/disease characteristics and response to treatment/discontinuation trial for these patients were recorded at 6months and at last follow up. The first EEG was retrospectively, blindly, and visually assessed for focal slowing, focal discharges and also quantitatively analyzed for amplitude or latency asymmetries of generalized discharges. Association between these variables and development of drug-resistance was evaluated.

resultsOut of 51 subjects, 40% had some type of EEG asymmetry by visual, 37% by quantitative and 54% by combined analysis. Drug-resistance was identified in 52% of patients after 6months and in 24% at the end of the follow up period (∼4.2years). 27% of patients underwent a discontinuation trial; 43% unsuccessfully. There was no association between baseline EEG asymmetries of any type and refractoriness to medical therapy, regardless of analytical method used.

conclusionsIn a carefully selected cohort of medication-naïve GGE patients, visual and quantitative asymmetries in the first EEG were not associated with the development of pharmaco-resistance. SIGNIFICANCE: These findings do not provide support for utilization of EEG asymmetries as a prognostic tool in GGE.

Indexed as

ElectroencephalographyAdolescentAnticonvulsantsCerebral CortexChildDrug ResistanceEpilepsy, GeneralizedFemaleHumansMalePrognosisRetrospective StudiesTreatment FailureAnticonvulsantsDrug resistanceEEGGGEIGESpike-wave asymmetries

Identifiers

PMID24095154
PMCPMC3925004
OpenAlexW2152600036

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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.