Evidence map›Paper›PMID 26008750›Full record

ArticleEuropean journal of epidemiology2016

Risk of Guillain-Barré syndrome after exposure to pandemic influenza A(H1N1)pdm09 vaccination or infection: a Norwegian population-based cohort study.

Sara Ghaderi, Nina Gunnes, Inger Johanne Bakken, Per Magnus, Lill Trogstad, Siri Eldevik Håberg

Open access · bronzeAbstract read
PubMed Publisher
In one paragraph

Article in European journal of epidemiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 4 pooled it
2.4field-weighted citation impact, top 12% 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, 4 syntheses or guidelines pooled it, 41 citations in OpenAlex.

  1. Pooled it
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  3. Guillain-Barré syndrome and influenza vaccines: current evidence.Revista espanola de quimioterapia : publicacion oficial de la Sociedad Espanola de Quimioterapia · 2019
    Pooled it
  4. Pooled it
  5. Review
  6. Article
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  10. Guillain-Barré syndrome.Nature reviews. Disease primers · 2024
    Article
  11. Review
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  13. Bilateral facial palsy after COVID-19 vaccination.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
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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

6 authors at 1 institution in 1 country.

Sara GhaderiDivision of Epidemiology, Department of Health Registries, Norwegian Institute of Public Health, Kalfarveien 31, 5018, Bergen, Norway. Sara.Ghaderi@fhi.no.
Nina GunnesDivision of Epidemiology, Department of Genes and Environment, Norwegian Institute of Public Health, Oslo, Norway.
Inger Johanne BakkenDivision of Epidemiology, Department of Genes and Environment, Norwegian Institute of Public Health, Oslo, Norway.
Per MagnusInstitute Management and Staff, Norwegian Institute of Public Health, Oslo, Norway.
Lill TrogstadDivision of Infectious Disease Control, Department of Vaccines, Norwegian Institute of Public Health, Oslo, Norway.
Siri Eldevik HåbergInstitute Management and Staff, Norwegian Institute of Public Health, Oslo, Norway.
Norwegian Institute of Public Health · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Vaccinations and infections are possible triggers of Guillain-Barré syndrome (GBS). However, studies on GBS after vaccinations during the influenza A(H1N1)pmd09 pandemic in 2009, show inconsistent results. Only few studies have addressed the role of influenza infection. We used information from national health data-bases with information on the total Norwegian population (N = 4,832,211). Cox regression analyses with time-varying covariates and self-controlled case series was applied. The risk of being hospitalized with GBS during the pandemic period, within 42 days after an influenza diagnosis or pandemic vaccination was estimated. There were 490 GBS cases during 2009-2012 of which 410 cases occurred after October 1, 2009 of which 46 new cases occurred during the peak period of the influenza pandemic. An influenza diagnosis was registered for 2.47% of the population and the vaccination coverage was 39.25%. The incidence rate ratio of GBS during the pandemic peak relative to other periods was 1.46 [95% confidence interval (CI) 1.08-1.98]. The adjusted hazard ratio (HR) of GBS within 42 days after a diagnosis of pandemic influenza was 4.89 (95% CI 1.17-20.36). After pandemic vaccination the adjusted HR was 1.11 (95% CI 0.51-2.43). Our results indicated that there was a significantly increased risk of GBS during the pandemic season and after pandemic influenza infection. However, vaccination did not increase the risk of GBS. The small number of GBS cases in this study warrants caution in the interpretation of the findings.

Indexed as

FemaleGuillain-Barre SyndromeHospitalizationHumansIncidenceInfluenza A Virus, H1N1 SubtypeInfluenza, HumanInfluenza VaccinesMaleNorwayPandemicsPopulation SurveillanceProportional Hazards ModelsRegistriesRegression AnalysisRiskInfluenza VaccinesGuillain-Barré syndromeInfluenzaNorwayPandemrix®RegistryVaccination

Identifiers

PMID26008750
OpenAlexW364078641

What OpenQuestion holds

Textmetadata
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.