Evidence map›Paper›PMID 38088512›Full record

ArticleAlzheimer's & dementia : the journal of the Alzheimer's Association2024

Clinically apparent Helicobacter pylori infection and the risk of incident Alzheimer's disease: A population-based nested case-control study.

Antonios Douros, Zharmaine Ante, Carlo A Fallone, Laurent Azoulay, Christel Renoux, Samy Suissa, Paul Brassard

Abstract read
In one paragraph

Article in Alzheimer's & dementia : the journal of the Alzheimer's Association, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 2 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

15 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Efficacy of probiotics pretreatment inAnnals of medicine · 2025
    Pooled it
  2. Pooled it
  3. Review
  4. Article
  5. Microbiota-Gut-Brain Axis in Neurodegenerative Diseases: The Role of Bacterial Amyloids.Cellular and molecular gastroenterology and hepatology · 2026
    Review
  6. Review
  7. Article
  8. Data Resource Profile Update: CPRD GOLD.International journal of epidemiology · 2025
    Article
  9. Review
  10. Polymicrobial interactions ofJournal of oral microbiology · 2025
    Review
  11. Article
  12. Review
  13. Article
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  15. 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

7 authors.

Antonios DourosDepartment of Medicine, McGill University, Montreal, Quebec, Canada.
Zharmaine AnteCentre for Clinical Epidemiology, Lady Davis Institute, Montreal, Quebec, Canada.
Carlo A FalloneDepartment of Medicine, McGill University, Montreal, Quebec, Canada.
Laurent AzoulayDepartment of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada.
Christel RenouxDepartment of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada.
Samy SuissaDepartment of Medicine, McGill University, Montreal, Quebec, Canada.
Paul BrassardDepartment of Medicine, McGill University, Montreal, Quebec, Canada.ORCID 0000-0001-7485-2546

Funding

CIHR CIHR #183856
6 · The paper itself

Abstract

introductionOur population-based study assessed whether clinically apparent Helicobacter pylori infection (CAHPI) is associated with the risk of Alzheimer's disease (AD).

methodsWe assembled a population-based cohort of all dementia-free subjects in the United Kingdom's Clinical Practice Research Datalink (UK CPRD), aged ≥50 years (1988-2017). Using a nested case-control approach, we matched each newly developed case of AD with 40 controls. Conditional logistic regression estimated odds ratios (ORs) with 95% confidence intervals (CIs) of AD associated with CAHPI compared with no CAHPI during ≥2 years before the index date. We also used salmonellosis as a negative control exposure.

resultsAmong 4,262,092 dementia-free subjects, 40,455 developed AD after a mean 11 years of follow-up. CAHPI was associated with an increased risk of AD (OR, 1.11; 95% CI, 1.01-1.21) compared with no CAHPI. Salmonellosis was not associated with the risk of AD (OR, 1.03; 95% CI, 0.82-1.29). DISCUSSION: CAHPI was associated with a moderately increased risk of AD. HIGHLIGHTS: CAHPI was associated with an 11% increased risk of AD in subjects aged ≥50 years. The increase in the risk of AD reached a peak of 24% a decade after CAHPI onset. There was no major effect modification by age or sex. Sensitivity analyses addressing several potential biases led to consistent results.

Indexed as

Alzheimer DiseaseHelicobacter InfectionsHelicobacter pyloriAgedCase-Control StudiesFemaleHumansLogistic ModelsMaleMiddle AgedRisk Factorsepidemiologyinfectious diseaseneurodegenerationprevention

Identifiers

PMID38088512
PMCPMC10984501

What OpenQuestion holds

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LicenceCC BY-NC
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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.