Evidence map›Paper›PMID 26981156›Full record

ReviewGut pathogens2016

Systematic review of time trends in the prevalence of Helicobacter pylori infection in China and the USA.

Peter Nagy, Saga Johansson, Michael Molloy-Bland

Open access · goldAbstract readReview
In one paragraph

Review in Gut pathogens, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 94 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
94citing papers in PubMed, 5 pooled it
20.1field-weighted citation impact, top 1% 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

94 citing papers in PubMed, 5 syntheses or guidelines pooled it, 204 citations in OpenAlex.

  1. Pooled it
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  6. Trial
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  10. Article
  11. Association ofFrontiers in cellular and infection microbiology · 2026
    Article
  12. Microorganisms · 2025
    Article
  13. Article
  14. Antibiotic Resistance ofJournal of Korean medical science · 2024
    Review
  15. Article
  16. Frontiers in microbiology · 2024
    Article
  17. Article
  18. Relationship between antibiotic resistance and the cagA and vacA genotypes among Helicobacter pylori strain isolates from patients in Xi'an.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2023
    Article
  19. Article
  20. Review

34 more citing papers are in PubMed but not listed here.

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

3 authors at 2 institutions in 2 countries.

Peter NagyAstraZeneca Gothenburg, Pepparedsleden 1, 431 83 Mölndal, Sweden.
Saga JohanssonAstraZeneca Gothenburg, Pepparedsleden 1, 431 83 Mölndal, Sweden.
Michael Molloy-BlandSchool of Medicine, Pharmacy and Health, Durham University, Durham, UK ; Research Evaluation Unit, Oxford PharmaGenesis Ltd, Oxford, UK.
AstraZeneca (Sweden) · SEDurham University · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

It has been suggested that the prevalence of Helicobacter pylori infection has stabilized in the USA and is decreasing in China. We conducted a systematic literature analysis to test this hypothesis. PubMed and Embase searches were conducted up to 19 January 2015. Trends in the prevalence of H. pylori infection over time were assessed by regression analysis using Microsoft Excel. Overall, 25 Chinese studies (contributing 28 datasets) and 11 US studies (contributing 11 datasets) were included. There was a significant decrease over time in the H. pylori infection prevalence for the Chinese studies overall (p = 0.00018) and when studies were limited to those that used serum immunoglobulin G (IgG) assays to detect H. pylori infection (p = 0.014; 20 datasets). The weighted mean prevalence of H. pylori infection was 66 % for rural Chinese populations and 47 % for urban Chinese populations. There was a significant trend towards a decreasing prevalence of H. pylori infection for studies that included only urban populations (p = 0.04; 9 datasets). This trend was no longer statistically significant when these studies were further restricted to those that used serum IgG assays to detect H. pylori infection, although this may have been because of low statistical power due to the small number of datasets available for this analysis (p = 0.28; 6 datasets). There were no significant trends in terms of changes in the prevalence of H. pylori infection over time for studies conducted in the USA. In conclusion, the prevalence of H. pylori infection is most likely decreasing in China, due to a combination of increasing urbanization, which we found to be associated with lower H. pylori infection rates, and possibly also decreasing rates of H. pylori infection within urban populations. This will probably result in a gradual decrease in peptic ulcer and gastric cancer rates in China over time.

Indexed as

ChinaHelicobacter pyloriPrevalenceTime trendsUSA

Identifiers

PMID26981156
PMCPMC4791971
OpenAlexW2300434199

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.