Evidence map›Paper›PMID 37311644›Full record

ArticleNeurology(R) neuroimmunology & neuroinflammation2023

Frequency and Referral Patterns of Neural Antibody Studies During the COVID-19 Pandemic: Experience From an Autoimmune Neurology Center.

Helena Ariño, Raquel Ruiz García, Beatriz Rioseras, Laura Naranjo, Eugenia Martinez-Hernandez, Albert Saiz, Francesc Graus, Josep Dalmau

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in Neurology(R) neuroimmunology & neuroinflammation, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
4.1field-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

12 citing papers in PubMed, 1 synthesis or guideline pooled it, 20 citations in OpenAlex.

  1. Pooled it
  2. Reduced Hospital Incidence of Autoimmune Encephalitis During the COVID-19 Pandemic.Neurology(R) neuroimmunology & neuroinflammation · 2026
    Article
  3. Article
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  5. Missing Full Disclosures.Neurology(R) neuroimmunology & neuroinflammation · 2025
    Article
  6. Anti-IgLON5 Disease 10 Years Later: What We Know and What We Do Not Know.Neurology(R) neuroimmunology & neuroinflammation · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 1 institution in 2 countries.

Helena AriñoFrom the Consorci Institut D'Investigacions Biomediques August Pi i Sunyer (H.A., R.R.G., E.M.-H., A.S., F.G., J.D.); Neurology Service, Hospital Clínic de Barcelona (R.R.G., L.N., E.M.-H., A.S., J.D.); University of Barcelona (A.S., J.D.); Hospital Universitario Central de Asturias (B.R.), Oviedo; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid; Catalan Institution for Research and Advanced Studies (J.D.) Barcelona, Spain; and Department of Neurology, University of Pennsylvania (J.D.), Philadelphia, PA.ORCID 0000-0003-4036-1671
Raquel Ruiz GarcíaFrom the Consorci Institut D'Investigacions Biomediques August Pi i Sunyer (H.A., R.R.G., E.M.-H., A.S., F.G., J.D.); Neurology Service, Hospital Clínic de Barcelona (R.R.G., L.N., E.M.-H., A.S., J.D.); University of Barcelona (A.S., J.D.); Hospital Universitario Central de Asturias (B.R.), Oviedo; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid; Catalan Institution for Research and Advanced Studies (J.D.) Barcelona, Spain; and Department of Neurology, University of Pennsylvania (J.D.), Philadelphia, PA.ORCID 0000-0002-8403-3613
Beatriz RioserasFrom the Consorci Institut D'Investigacions Biomediques August Pi i Sunyer (H.A., R.R.G., E.M.-H., A.S., F.G., J.D.); Neurology Service, Hospital Clínic de Barcelona (R.R.G., L.N., E.M.-H., A.S., J.D.); University of Barcelona (A.S., J.D.); Hospital Universitario Central de Asturias (B.R.), Oviedo; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid; Catalan Institution for Research and Advanced Studies (J.D.) Barcelona, Spain; and Department of Neurology, University of Pennsylvania (J.D.), Philadelphia, PA.ORCID 0009-0009-8269-6374
Laura NaranjoFrom the Consorci Institut D'Investigacions Biomediques August Pi i Sunyer (H.A., R.R.G., E.M.-H., A.S., F.G., J.D.); Neurology Service, Hospital Clínic de Barcelona (R.R.G., L.N., E.M.-H., A.S., J.D.); University of Barcelona (A.S., J.D.); Hospital Universitario Central de Asturias (B.R.), Oviedo; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid; Catalan Institution for Research and Advanced Studies (J.D.) Barcelona, Spain; and Department of Neurology, University of Pennsylvania (J.D.), Philadelphia, PA.ORCID 0000-0001-9295-1468
Eugenia Martinez-HernandezFrom the Consorci Institut D'Investigacions Biomediques August Pi i Sunyer (H.A., R.R.G., E.M.-H., A.S., F.G., J.D.); Neurology Service, Hospital Clínic de Barcelona (R.R.G., L.N., E.M.-H., A.S., J.D.); University of Barcelona (A.S., J.D.); Hospital Universitario Central de Asturias (B.R.), Oviedo; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid; Catalan Institution for Research and Advanced Studies (J.D.) Barcelona, Spain; and Department of Neurology, University of Pennsylvania (J.D.), Philadelphia, PA.
Albert SaizFrom the Consorci Institut D'Investigacions Biomediques August Pi i Sunyer (H.A., R.R.G., E.M.-H., A.S., F.G., J.D.); Neurology Service, Hospital Clínic de Barcelona (R.R.G., L.N., E.M.-H., A.S., J.D.); University of Barcelona (A.S., J.D.); Hospital Universitario Central de Asturias (B.R.), Oviedo; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid; Catalan Institution for Research and Advanced Studies (J.D.) Barcelona, Spain; and Department of Neurology, University of Pennsylvania (J.D.), Philadelphia, PA.
Francesc GrausFrom the Consorci Institut D'Investigacions Biomediques August Pi i Sunyer (H.A., R.R.G., E.M.-H., A.S., F.G., J.D.); Neurology Service, Hospital Clínic de Barcelona (R.R.G., L.N., E.M.-H., A.S., J.D.); University of Barcelona (A.S., J.D.); Hospital Universitario Central de Asturias (B.R.), Oviedo; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid; Catalan Institution for Research and Advanced Studies (J.D.) Barcelona, Spain; and Department of Neurology, University of Pennsylvania (J.D.), Philadelphia, PA.
Josep DalmauFrom the Consorci Institut D'Investigacions Biomediques August Pi i Sunyer (H.A., R.R.G., E.M.-H., A.S., F.G., J.D.); Neurology Service, Hospital Clínic de Barcelona (R.R.G., L.N., E.M.-H., A.S., J.D.); University of Barcelona (A.S., J.D.); Hospital Universitario Central de Asturias (B.R.), Oviedo; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid; Catalan Institution for Research and Advanced Studies (J.D.) Barcelona, Spain; and Department of Neurology, University of Pennsylvania (J.D.), Philadelphia, PA. jdalmau@clinic.cat.
Institució Catalana de Recerca i Estudis Avançats · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo determine whether the frequency of paraneoplastic or autoimmune encephalitis antibodies examined in a referral center changed during the COVID-19 pandemic.

methodsThe number of patients who tested positive for neuronal or glial (neural) antibodies during pre-COVID-19 (2017-2019) and COVID-19 (2020-2021) periods was compared. The techniques used for antibody testing did not change during these periods and included a comprehensive evaluation of cell-surface and intracellular neural antibodies. The chi-square test, Spearman correlation, and Python programming language v3 were used for statistical analysis.

resultsSerum or CSF from 15,390 patients with suspected autoimmune or paraneoplastic encephalitis was examined. The overall positivity rate for antibodies against neural-surface antigens was similar in the prepandemic and pandemic periods (neuronal 3.2% vs 3.5%; glial 6.1 vs 5.2) with a mild single-disease increase in the pandemic period (anti-NMDAR encephalitis). By contrast, the positivity rate for antibodies against intracellular antigens was significantly increased during the pandemic period (2.8% vs 3.9%, DISCUSSION: Our findings do not support that the COVID-19 pandemic led to a substantial increase of known or novel encephalitis mediated by antibodies against neural-surface antigens. The increase in Hu and GFAP antibodies likely reflects the progressive increased recognition of the corresponding disorders.

Indexed as

Anti-N-Methyl-D-Aspartate Receptor EncephalitisCOVID-19NeurologyAntigens, SurfaceAutoantibodiesHumansPandemicsReferral and ConsultationAntigens, SurfaceAutoantibodies

Identifiers

PMID37311644
PMCPMC10265401
OpenAlexW4380537628

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.