Evidence map›Paper›PMID 26668747›Full record

ArticleUnited European gastroenterology journal2015

The association between Helicobacter pylori infection and inflammatory bowel disease based on meta-analysis.

T Rokkas, J P Gisbert, Y Niv, C O'Morain

Open access · bronzeAbstract read
In one paragraph

Article in United European gastroenterology journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed, 6 pooled it
6.8field-weighted citation impact, top 3% 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

52 citing papers in PubMed, 6 syntheses or guidelines pooled it, 100 citations in OpenAlex.

  1. To eradicate or not?Frontiers in medicine · 2026
    Pooled it
  2. Pooled it
  3. Association Between Helicobacter pylori Exposure and Decreased Odds of Eosinophilic Esophagitis-A Systematic Review and Meta-analysis.Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association · 2019
    Pooled it
  4. Pooled it
  5. ACG Clinical Guideline: Treatment of Helicobacter pylori Infection.The American journal of gastroenterology · 2017
    Guideline
  6. Pooled it
  7. Article
  8. Effect ofTherapeutic advances in gastroenterology · 2026
    Review
  9. JGH open : an open access journal of gastroenterology and hepatology · 2025
    Review
  10. The Controversies in the Relationship BetweenJournal of clinical medicine · 2025
    Review
  11. Article
  12. Review
  13. MicroRNA-Mediated Regulatory Networks inBiochemistry research international · 2025
    Review
  14. Bibliometric analysis of the correlation between H. pylori and inflammatory bowel disease.JGH open : an open access journal of gastroenterology and hepatology · 2024
    Review
  15. Article
  16. Dual RNA sequencing ofmSystems · 2024
    Article
  17. IsThe Korean journal of helicobacter and upper gastrointestinal research · 2024
    Article
  18. Disease trends afterWorld journal of gastroenterology · 2023
    Article
  19. Article
  20. Therapeutic advances in gastroenterology · 2023
    Review
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 at 4 institutions in 4 countries.

T RokkasGastroenterology Clinic, Henry Dunant Hospital Center, Athens, Greece.
J P GisbertGastroenterology Unit, La Princesa University Hospital, Instituto de Investigación Sanitaria Princesa (IIS-IP), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain.
Y NivDepartment of Gastroenterology, Rabin Medical Center, Tel Aviv University, Tel Aviv, Israel.
C O'MorainDepartment of Gastroenterology, Meath/Adelaide Hospital, Dublin, Ireland.
Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas · ESHenry Dunant Hospital · GRTallaght University Hospital · IETel Aviv University · IL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn humans there are epidemiological data suggesting a protective effect of Helicobacter pylori (H. pylori) infection against the development of autoimmune diseases and in addition, there are laboratory data illustrating H. pylori's ability to induce immune tolerance and limit inflammatory responses. Thus, numerous observational studies have examined the association between H. pylori infection and inflammatory bowel disease (IBD) with various results.

objectiveWe performed a meta-analysis of available studies to better define the association of H. pylori infection and IBD.

methodsMedical literature searches for human studies were performed through September 2014, using suitable keywords. In each study the risk ratio (RR) of H. pylori infection in IBD patients vs controls was calculated and pooled estimates were obtained using fixed- or random-effects models as appropriate. Heterogeneity between studies was evaluated using Cochran Q test and I(2) statistics, whereas the likelihood of publication bias was assessed by constructing funnel plots.

resultsThirty-three studies were eligible for meta-analysis, including 4400 IBD patients and 4763 controls. Overall 26.5% of IBD patients were positive for H. pylori infection, compared to 44.7% of individuals in the control group. There was significant heterogeneity in the included studies (Q = 137.2, df (Q) =32, I(2) ( )= 77%, p < 0.001) and therefore the random-effects model of meta-analysis was used. The obtained pool RR estimation was 0.62 (95% confidence interval (CI) 0.55-0.71, test for overall effect Z = -7.04, p < 0.001). There was no evidence of publication bias.

conclusionThe results of this meta-analysis showed a significant negative association between H. pylori infection and IBD that supports a possible protective benefit of H. pylori infection against the development of IBD.

Indexed as

Crohn’s diseaseHelicobacter pyloriinflammatory bowel diseasemeta-analysisulcerative colitis

Identifiers

PMID26668747
PMCPMC4669512
OpenAlexW2072715384

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.