Evidence map›Paper›PMID 34521367›Full record

ArticleBMC infectious diseases2021

Prevalence estimates of genital Chlamydia trachomatis infection in Belgium: results from two cross-sectional studies.

Natalie Fischer, Ilse Peeters, Sofieke Klamer, Marion Montourcy, Vicky Cuylaerts, Dominique Van Beckhoven, Irith De Baetselier, Johan Van der Heyden, Wim Vanden Berghe

Open access · goldAbstract read
In one paragraph

Article in BMC infectious diseases, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
0.6field-weighted citation impact, top 34% 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

8 citing papers in PubMed, 8 citations in OpenAlex.

  1. Article
  2. Review
  3. Attitudes toward partner notification ofFrontiers in public health · 2026
    Article
  4. Article
  5. Prevalence and Genetic Characterization ofThe Canadian journal of infectious diseases & medical microbiology = Journal canadien des maladies infectieuses et de la microbiologie medicale · 2025
    Article
  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

9 authors at 2 institutions in 1 country.

Natalie FischerService Epidemiology of Infectious Diseases, Sciensano, Rue Ernest Blerot 1, 1070, Anderlecht, Belgium. Natalie.Fischer211@gmail.com.
Ilse PeetersService Epidemiology of Infectious Diseases, Sciensano, Rue Ernest Blerot 1, 1070, Anderlecht, Belgium.
Sofieke KlamerService Epidemiology of Infectious Diseases, Sciensano, Rue Ernest Blerot 1, 1070, Anderlecht, Belgium.
Marion MontourcyService Epidemiology of Infectious Diseases, Sciensano, Rue Ernest Blerot 1, 1070, Anderlecht, Belgium.
Vicky CuylaertsDepartment of Clinical Sciences, National Reference Centre for Sexually Transmitted Infections, Clinical Reference Laboratory, Institute of Tropical Medicine, Nationalestraat 155, 2000, Antwerp, Belgium.
Dominique Van BeckhovenService Epidemiology of Infectious Diseases, Sciensano, Rue Ernest Blerot 1, 1070, Anderlecht, Belgium.
Irith De BaetselierDepartment of Clinical Sciences, National Reference Centre for Sexually Transmitted Infections, Clinical Reference Laboratory, Institute of Tropical Medicine, Nationalestraat 155, 2000, Antwerp, Belgium.
Johan Van der HeydenService Lifestyle and Chronic Diseases, Sciensano, Rue Ernest Blerot 1, 1070, Anderlecht, Belgium.
Wim Vanden BergheService Epidemiology of Infectious Diseases, Sciensano, Rue Ernest Blerot 1, 1070, Anderlecht, Belgium.
Sciensano (Belgium) · BEInstituut voor Tropische Geneeskunde · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundChlamydia trachomatis (chlamydia) is the most diagnosed sexually transmitted infection in Belgium. Screening programs focus on young women, due to the implications of chronic asymptomatic infections for reproductive health. Thereby, the frequency of infections in men and older adults is underestimated. This study aimed to estimate the point-prevalence of chlamydia in the broader Belgian population, to inform evidence-based prevention and control strategies.

methodsWe conducted two cross-sectional prevalence studies of chlamydia infection in the population of Belgium aged 16-59 years, 2018-2020. In the CT1 study 12,000 representative individuals were randomly selected from the national register and invited by letter to collect a urine sample at home. The CT2 study used urine samples collected through the Belgian Health Examination Survey. Molecular detection of chlamydia DNA was performed using Xpert

resultsThe population-wide weighted estimated prevalence was 1.54% (95% CI 0.78-3) in CT1 and 1.76% (95% CI 0.63-4) in CT2. We observed no statistically significant difference between men and women or age groups. Civil relationship status (OR = 14.1 (95% CI 1.78-112), p < 0.01), sexual intercourse with a casual partner (OR = 6.31 (95% CI 1.66-24.1), p < 0.01) and > 3 sexual partners in the last 12 months (OR = 4.53 (95% CI 1.10-18.6), p = 0.02) were associated with higher relative risk for chlamydia infection.

conclusionNationwide prevalence studies are relevant to assess the distribution of chlamydia and inform public health actions. The overall low prevalence and heterogeneous distribution of chlamydia in the general Belgian population needs to be considered for future strategies and potential harm of testing and treating asymptomatic individuals need to be taken into account. Effective case management should include appropriate treatment of symptomatic patients and partner notification, and prevention strategies should encourage behaviors such as condom use.

Indexed as

Chlamydia InfectionsChlamydia trachomatisAdolescentAdultBelgiumCross-Sectional StudiesFemaleGenitaliaHumansMaleMiddle AgedPrevalenceRisk FactorsSexual BehaviorYoung AdultBelgiumChlamydia trachomatisCross-sectional studyPrevalenceSexually transmitted infections

Identifiers

PMID34521367
PMCPMC8439092
OpenAlexW3201128846

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.