Meta-analysisindependent cross-checkabstract checked I-GUT-122 standard review
Treating H. pylori prevents stomach cancer
Eradication Therapy to Prevent Gastric Cancer in Helicobacterpylori-Positive Individuals: Systematic Review and Meta-Analysis of Randomized Controlled Trials and Observational Studies.
Overview
Ford AC et al.. Gastroenterology 2025 · PMID 39824392 · DOI 10.1053/j.gastro.2024.12.033
In randomised trials, clearing H. pylori lowered stomach cancer by about a third and stomach cancer deaths by about a fifth.
Does the study support the specific claim? No · Methodological quality: high
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Update evidence on eradication and gastric cancer.
- How was the study done?
Meta-analysis of RCTs and observational studies.
- How many people, animals or samples were studied?
11 RCTs, 13 observational studies.
- What was actually found?
Fewer cancers and cancer deaths after eradication.
- How large was the observed effect?
RR 0.64 incidence; 0.78 mortality.
- What do the results mean in everyday life?
Treating the infection protects against stomach cancer.
- What are the study's limitations?
Regional mix of trials.
- What does it say about Elawady's specific claim?
Contradicts the claim.
- Do the results apply to Germany and Europe?
Applicable; lower baseline risk in Europe.
- What can explicitly not be concluded from this study?
Cannot give exact absolute benefit for Egypt.
Scientific in-depth review
1. Full reference
- Authors
- Ford AC et al.
- Journal
- Gastroenterology
- Year
- 2025
- Identifier
- PMID 39824392 DOI 10.1053/j.gastro.2024.12.033
- Verification
- verified – PubMed efetch 2026-10-26 + Crossref 2026-10-26
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
World Health Organization grant (PubMed record)
2. Research question
Does H. pylori eradication prevent gastric cancer?
3. Study design and population
- Study design
- Meta-analysis – Updated systematic review and meta-analysis of RCTs and observational studies
- Population
H. pylori-positive adults without neoplasia, or after endoscopic resection of early gastric neoplasia
- Country
International
- Period
Search to 4 Oct 2024
- Sample size
11 RCTs and 13 observational studies
- Inclusion and exclusion criteria
Follow-up >=2 years; control placebo or no eradication
4. Methods and endpoints
- Exposure / intervention
Eradication therapy
- Comparator
Placebo / no eradication
- Endpoints
Gastric cancer incidence and mortality
- Statistical methods
Pooled relative risks
5. Actual results
- Results
RCTs: gastric cancer RR 0.64 (0.48-0.84) in healthy infected people (8 RCTs); 0.52 (0.38-0.71) after EMR (3 RCTs); gastric cancer death RR 0.78 (0.62-0.98) (5 RCTs). Observational: RR 0.56 (0.43-0.73) and 0.19 (0.06-0.61).
- Absolute risks
Not reported in abstract
- Authors' conclusion
Eradication therapy prevents gastric cancer in H. pylori-positive individuals, consistently across designs.
6. Strengths
- RCT evidence including mortality
- Update of earlier review
7. Weaknesses
- Trial regions not detailed in abstract (earlier version mostly East Asian)
- Overlaps with I-GUT-03 (earlier version)
8. Risk of bias
- Orienting tool
- AMSTAR 2
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- low
- Rationale
Experienced review team.
9. Assessment of the statistical interpretation
Supersedes I-GUT-03; count once.
10. Relevance to the specific claim
Newest high-certainty evidence that treating H. pylori prevents gastric cancer and cancer deaths.
11. Independent contrary findings
None of comparable quality.
12. Transferability to Germany and Europe
Baseline gastric cancer risk differs by region; relative effect likely similar.
13. Overall methodological judgement
Strong evidence against calling the H. pylori paradigm a 'crime'.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | high |
| Risk of bias | low |
| Precision of results | moderate |
| Directness | direct |
| Reproducibility | replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | moderate |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
Population screening in low-incidence regions.
15. Linked fact checks
- Redefining peptic ulcer as an H. pylori infection was a 'crime'; the real problem is low stomach acid, and acid blockers plus antibiotic 'triple therapy' are the wrong treatment. – Studies contradicting or limiting the claim