Evidence map›Paper›PMID 35034187›Full record

SynthesisJournal of neurology2022

Efficacy and safety of VNS therapy or continued medication management for treatment of adults with drug-resistant epilepsy: systematic review and meta-analysis.

Sarah Batson, Rohit Shankar, Joan Conry, Jane Boggs, Rodney Radtke, Stephen Mitchell, Francesca Barion, Joanna Murphy, Vanessa Danielson

Open access · hybridAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Journal of neurology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
3.5field-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

25 citing papers in PubMed, 44 citations in OpenAlex.

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  15. Magnetogenetic cell activation using endogenous ferritin.bioRxiv : the preprint server for biology · 2024
    Article
  16. Article
  17. Article
  18. Review
  19. Neuropsychiatric Lyme Disease and Vagus Nerve Stimulation.Antibiotics (Basel, Switzerland) · 2023
    Review
  20. Article
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

9 authors at 6 institutions in 2 countries.

Sarah BatsonSarah Batson, Mtech Access Limited, 30 Murdock Road, Bicester, OX26 4PP, Oxfordshire, England. sarah.batson@mtechaccess.co.uk.
Rohit ShankarNeuropsychiatry, Peninsula School of Medicine, University of Plymouth, Plymouth, England.ORCID http://orcid.org/0000-0002-1183-6933
Joan ConryChildren's National, Washington, District of Columbia, USA.ORCID http://orcid.org/0000-0002-1397-1370
Jane BoggsWake Forest Baptist Health, Winston-Salem, NC, USA.ORCID http://orcid.org/0000-0003-1083-2954
Rodney RadtkeDuke University School of Medicine, Durham, NC, USA.ORCID http://orcid.org/0000-0001-5029-5829
Stephen MitchellSarah Batson, Mtech Access Limited, 30 Murdock Road, Bicester, OX26 4PP, Oxfordshire, England.
Francesca BarionPricing, Health Economics, Market Access and Reimbursement (PHEMAR), LivaNova, London, England.
Joanna MurphyPricing, Health Economics, Market Access and Reimbursement (PHEMAR), LivaNova, London, England.
Vanessa DanielsonGlobal VP, PHEMAR, LivaNova, London, England.
LivaNova (United Kingdom) · GBAtrium Health Wake Forest Baptist · USChildren's National · USDuke University · USSarah Cannon Research Institute · GBUniversity of Plymouth · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Vagus nerve stimulation (VNS) Therapy® is an adjunctive neurostimulation treatment for people with drug-resistant epilepsy (DRE) who are unwilling to undergo resective surgery, have had unsuccessful surgery or are unsuitable for surgery. A systematic review and meta-analysis were conducted to determine the treatment effects of VNS Therapy as an adjunct to anti-seizure medications (ASMs) for the management of adults with DRE. A literature search was performed in August 2020 of the Medline®, Medline® Epub Ahead of Print, Embase, and the Cochrane library databases. Outcomes examined included reduction in seizure frequency, seizure freedom, ASM load, discontinuations, and serious adverse events (SAEs). Comparators included best medical practice, ASMs, low-stimulation or sham VNS Therapy. Four RCTs and six comparative observational studies were identified for inclusion. Against comparators, individuals treated with VNS had a significantly better odds of experiencing a ≥ 50% reduction in seizure frequency (OR: 2.27 [95% CI 1.47, 3.51]; p = 0.0002), a ≥ 75% reduction in seizure frequency (OR: 3.56 [95% CI 1.59, 7.98]; p = 0.002) and a reduced risk for increased ASM load (risk ratio: 0.36 [95% CI 0.21, 0.62]; p = 0.0002). There was no difference in the odds of discontinuation or the rate of SAEs between VNS versus comparators. This meta-analysis demonstrated the benefits of VNS Therapy in people with DRE, which included improvement in seizure frequency without an increase in the rate of SAEs or discontinuations, thereby supporting the consideration of VNS Therapy for people who are not responding to ASMs and those unsuitable or unwilling to undergo surgery.

Indexed as

Drug Resistant EpilepsyVagus Nerve StimulationAdultHumansMedication Therapy ManagementSeizuresTreatment OutcomeAnti-seizure medicationDrug-resistant epilepsyMeta-analysisSeizure frequencyVNS therapy

Identifiers

PMID35034187
PMCPMC9119900
OpenAlexW4225265970

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.