Evidence map›Paper›PMID 33879080›Full record

SynthesisBMC gastroenterology2021

Correlation between the geographical origin of Helicobacter pylori homB-positive strains and their clinical outcomes: a systematic review and meta-analysis.

Masoud Keikha, Mohsen Karbalaei

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC gastroenterology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 pooled it
–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

8 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Microbiology and molecular biology reviews : MMBR · 2026
    Review
  3. Trends in upper gastrointestinal bleeding management.World journal of clinical cases · 2024
    Article
  4. Review
  5. The Influence ofAntibiotics (Basel, Switzerland) · 2023
    Review
  6. Article
  7. Article
  8. 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

2 authors.

Masoud KeikhaDepartment of Microbiology and Virology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Mohsen KarbalaeiDepartment of Microbiology and Virology, School of Medicine, Jiroft University of Medical Sciences, Jiroft, Iran. mohsen.karbalaei@jmu.ac.ir.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn general, all virulence factors of Helicobacter pylori (H. pylori) are involved in its infections. However, recent studies have shown that the homB gene is one of the virulence genes that affects the severity of the clinical results of this bacterium.

methodsThe main purpose of this study was to investigate the relationship between the presence of homB gene in H. pylori and the progression of its infection to peptic ulcer and gastric cancer. In the present study, we conducted a systematic search to collect all articles related to the effect of homB-positive strains on clinical outcomes. Finally, 12 eligible studies according to our criteria were included in this meta-analysis and the effect of homB gene on gastric ulcer and gastric cancer diseases was evaluated by summary odds ratio (OR).

resultsCurrent results showed that the homB-positive strains significantly increase the risk of peptic ulcer (OR 1.36; 1.07-1.72 with 95% CIs), especially in western countries (OR 1.61; 1.20-2.14 with 95% CIs). Moreover, we observed a positive association between the homB gene and risk of gastric cancer (OR 2.16; 1.37-3.40 with 95% CIs). In addition, based on subgroup analysis, it was found that the presence of this gene in H. pylori strains increases the risk of gastric cancer in the Asian population (OR 3.71; 1.85-7.45 with 95% CIs).

conclusionsOverall, in the present study we found that homB gene is responsible for the progressing of primary infection to severe complications, in particular peptic ulcer in western countries and gastric cancer in Asian countries.

Indexed as

Helicobacter InfectionsHelicobacter pyloriPeptic UlcerStomach NeoplasmsAntigens, BacterialBacterial ProteinsHumansVirulence FactorsAntigens, BacterialBacterial ProteinsVirulence FactorsGastric cancerHelicobacter pyloriHomB geneMALTPeptic ulcer

Identifiers

PMID33879080
PMCPMC8056685

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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.