Evidence map›Paper›PMID 33041507›Full record

ArticleJournal of clinical biochemistry and nutrition2020

Association between selective IgA deficiency and COVID-19.

Yuji Naito, Tomohisa Takagi, Tetsuro Yamamoto, Shaw Watanabe

Abstract read
In one paragraph

Article in Journal of clinical biochemistry and nutrition, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
–field-weighted citation impact
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

20 citing papers in PubMed.

  1. Article
  2. Review
  3. Selective IgA deficiency and COVID-19.The journal of allergy and clinical immunology. In practice · 2023
    Article
  4. Article
  5. Article
  6. Selective IgA Deficiency May Be an Underrecognized Risk Factor for Severe COVID-19.The journal of allergy and clinical immunology. In practice · 2023
    Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Review
  12. Article
  13. Article
  14. Article
  15. Review
  16. Coronavirus infection: An immunologists' perspective.Scandinavian journal of immunology · 2021
    Review
  17. Article
  18. IgA Antibodies and IgA Deficiency in SARS-CoV-2 Infection.Frontiers in cellular and infection microbiology · 2021
    Review
  19. IgA Deficiency and Membranoproliferative Glomerulonephritis: A Case Report.International medical case reports journal · 2021
    Article
  20. Editorial.Journal of clinical biochemistry and nutrition · 2020
    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

4 authors.

Yuji NaitoDepartment of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8066, Japan.
Tomohisa TakagiDepartment of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8066, Japan.
Tetsuro YamamotoTTC Co. Ltd., 1-20-2 Ebisu-nishi, Sibuya-ku, Tokyo 150-0021, Japan.
Shaw WatanabeAsia Pacific Clinical Nutrition Society, Life Science Promoting Association, 25-3-1004 Daijyo-cho, Shinjuku, Tokyo 160-0015, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The purpose of this study was to propose a hypothesis that there is a potential association between the incidence of selective IgA deficiency in various countries and COVID-19 cases. The number of deaths due to COVID-19 increased in clear proportion to the number of infected patients, and the difference in the number of deaths by country was due to the difference in the number of infected patients. The frequency of selective IgA deficiency has a strong positive correlation with the prevalence of COVID-19 per population. The low infection rate contributed to the low death rate from COVID-19 in Japan, suggesting that the extremely low frequency of selective IgA deficiency may be a contributing factor.

Indexed as

COVID-19IgA deficiencymortality

Identifiers

PMID33041507
PMCPMC7533856

What OpenQuestion holds

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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.