Evidence map›Paper›PMID 26645965›Full record

SynthesisNeurosurgery2016

Rates and Predictors of Seizure Freedom With Vagus Nerve Stimulation for Intractable Epilepsy.

Dario J Englot, John D Rolston, Clinton W Wright, Kevin H Hassnain, Edward F Chang

Open access · hybridAbstract readSystematic Review
In one paragraph

Synthesis in Neurosurgery, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 136 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
136citing papers in PubMed, 4 pooled it
6.5field-weighted citation impact, top 3% 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

136 citing papers in PubMed, 4 syntheses or guidelines pooled it, 292 citations in OpenAlex.

  1. Factors predicting the response to vagus nerve stimulation (VNS) in pediatric patients with drug- resistant epilepsy: a systematic review and meta-analysis.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2025
    Pooled it
  2. Pooled it
  3. Atonic seizures in children: a meta-analysis comparing corpus callosotomy to vagus nerve stimulation.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2021
    Pooled it
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  6. Observational
  7. Article
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  12. From a beautiful circuit to a viable therapy: Addressing the translational chasm in acupuncture-based neuromodulation.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  17. The impact of vagus nerve stimulation on the most disabling seizures: A retrospective study in adults with drug-resistant epilepsy.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Article
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  20. Review

76 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Dario J Englot*UCSF Comprehensive Epilepsy Center, University of California, San Francisco, California; ‡Department of Neurological Surgery, University of California, San Francisco, California; §Cyberonics, Inc., Houston, Texas.
John D Rolston
Clinton W Wright
Kevin H Hassnain
Edward F Chang
Neurological Surgery · USUniversity of California, San Francisco · US

Funding

Resting-State Functional Connectivity Analysis in Focal Neocortical EpilepsyF32NS086353 · NINDS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI ENGLOT, DARIO J · 2014 to 2014
$59k
NINDS NIH HHS F32 NS086353
6 · The paper itself

Abstract

backgroundNeuromodulation-based treatments have become increasingly important in epilepsy treatment. Most patients with epilepsy treated with neuromodulation do not achieve complete seizure freedom, and, therefore, previous studies of vagus nerve stimulation (VNS) therapy have focused instead on reduction of seizure frequency as a measure of treatment response.

objectiveTo elucidate rates and predictors of seizure freedom with VNS.

methodsWe examined 5554 patients from the VNS therapy Patient Outcome Registry, and also performed a systematic review of the literature including 2869 patients across 78 studies.

resultsRegistry data revealed a progressive increase over time in seizure freedom after VNS therapy. Overall, 49% of patients responded to VNS therapy 0 to 4 months after implantation (≥50% reduction seizure frequency), with 5.1% of patients becoming seizure-free, while 63% of patients were responders at 24 to 48 months, with 8.2% achieving seizure freedom. On multivariate analysis, seizure freedom was predicted by age of epilepsy onset >12 years (odds ratio [OR], 1.89; 95% confidence interval [CI], 1.38-2.58), and predominantly generalized seizure type (OR, 1.36; 95% CI, 1.01-1.82), while overall response to VNS was predicted by nonlesional epilepsy (OR, 1.38; 95% CI, 1.06-1.81). Systematic literature review results were consistent with the registry analysis: At 0 to 4 months, 40.0% of patients had responded to VNS, with 2.6% becoming seizure-free, while at last follow-up, 60.1% of individuals were responders, with 8.0% achieving seizure freedom.

conclusionResponse and seizure freedom rates increase over time with VNS therapy, although complete seizure freedom is achieved in a small percentage of patients. ABBREVIATIONS: AED, antiepileptic drugVNS, vagus nerve stimulation.

Indexed as

AdolescentAdultDrug Resistant EpilepsyFemaleHumansMaleMiddle AgedRegistriesRetrospective StudiesSeizuresTreatment OutcomeVagus Nerve StimulationYoung Adult

Identifiers

PMID26645965
PMCPMC4884552
OpenAlexW2192749205

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.