Evidence map›Paper›PMID 33065762›Full record

ArticleEuropean journal of neurology2021

Epstein-Barr virus infection after adolescence and human herpesvirus 6A as risk factors for multiple sclerosis.

M Biström, D Jons, E Engdahl, R Gustafsson, J Huang, N Brenner, J Butt, L Alonso-Magdalena, M Gunnarsson, M Vrethem and 8 more

Open access · hybridAbstract read
In one paragraph

Article in European journal of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 1 pooled it
4.4field-weighted citation impact, top 5% 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

33 citing papers in PubMed, 1 synthesis or guideline pooled it, 51 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Review
  4. Review
  5. Review
  6. Article
  7. Article
  8. A unifying model for multiple sclerosis.Clinical and experimental medicine · 2025
    Review
  9. Article
  10. Article
  11. Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. Viruses · 2024
    Review
  17. Article
  18. Review
  19. 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

18 authors at 7 institutions in 2 countries.

M BiströmDepartment of Clinical Science, Neurosciences, Umeå University, Umeå, Sweden.ORCID 0000-0003-3994-2305
D JonsDepartment of Clinical Neuroscience, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
E EngdahlDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
R GustafssonDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
J HuangDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
N BrennerInfections and Cancer Epidemiology, German Cancer Research Center (Deutsches Krebsforschungszentrum), Heidelberg, Germany.
J ButtInfections and Cancer Epidemiology, German Cancer Research Center (Deutsches Krebsforschungszentrum), Heidelberg, Germany.
L Alonso-MagdalenaDepartment of Neurology, Skåne University Hospital in Malmö/Lund and Institution of Clinical Sciences, Neurology, Lund University, Lund, Sweden.
M GunnarssonSchool of Medical Sciences, Örebro University, Örebro, Sweden.
M VrethemDepartment of Neurology and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.
N BenderInfections and Cancer Epidemiology, German Cancer Research Center (Deutsches Krebsforschungszentrum), Heidelberg, Germany.
T WaterboerInfections and Cancer Epidemiology, German Cancer Research Center (Deutsches Krebsforschungszentrum), Heidelberg, Germany.
G GranåsenDepartment of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden.
T OlssonDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
I KockumDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
O AndersenDepartment of Clinical Neuroscience, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
A Fogdell-HahnDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
Peter SundströmDepartment of Clinical Science, Neurosciences, Umeå University, Umeå, Sweden.
Karolinska Institutet · SEGerman Cancer Research Center · DEUmeå University · SEUniversity of Gothenburg · SELinköping University · SELund University · SEÖrebro University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeInfections with human herpesvirus 6A (HHV-6A) and Epstein-Barr virus (EBV) have been linked to multiple sclerosis (MS) development. For EBV, late infection has been proposed as a risk factor, but serological support is lacking. The objective of this study was to investigate how age affects the EBV and HHV-6A associated risks of developing MS.

methodsIn this nested case-control study, Swedish biobanks were accessed to find pre-symptomatically collected blood samples from 670 individuals who later developed relapsing MS and 670 matched controls. A bead-based multiplex assay was used to determine serological response against EBV and HHV-6A. Conditional logistic regression was used to calculate odds ratios and 95% confidence intervals.

resultsSeropositivity against EBV exhibited a pattern where associations switched from a decreased risk of developing MS in the group below 20 years of age to an increased risk amongst individuals aged 20-29 and 30-39 years (p for trend 0.020). The age of transition was estimated to be 18.8 years. In contrast, HHV-6A was associated with increased MS risk in all age groups (total cohort odds ratio 2.1, 95% confidence interval 1.6-2.7).

conclusionsThis study suggests EBV infection after adolescence and age independent HHV-6A infection as risk factors for MS.

Indexed as

Epstein-Barr Virus InfectionsHerpesvirus 6, HumanMultiple SclerosisAdolescentCase-Control StudiesHerpesvirus 4, HumanHumansRisk Factorscase-control studiesEpstein-Barr virushuman herpesvirus 6Amultiple sclerosisserology

Identifiers

PMID33065762
PMCPMC7839468
OpenAlexW3016663663

What OpenQuestion holds

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LicenceCC BY-NC
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.