Evidence map›Paper›PMID 31504315›Full record

ArticleClinical infectious diseases : an official publication of the Infectious Diseases Society of America2019

Chlamydia trachomatis and the Risk of Pelvic Inflammatory Disease, Ectopic Pregnancy, and Female Infertility: A Retrospective Cohort Study Among Primary Care Patients.

Casper D J den Heijer, Christian J P A Hoebe, Johanna H M Driessen, Petra Wolffs, Ingrid V F van den Broek, Bernice M Hoenderboom, Rachael Williams, Frank de Vries, Nicole H T M Dukers-Muijrers

Erratum issuedAbstract read
In one paragraph

Article in Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 55 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
55citing papers in PubMed, 3 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

55 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Preconception indicators and associations with health outcomes reported in UK routine primary care data: a systematic review.The British journal of general practice : the journal of the Royal College of General Practitioners · 2025
    Pooled it
  3. The Correlation between Chlamydia Trachomatis and Female Infertility: A Systematic Review.Revista brasileira de ginecologia e obstetricia : revista da Federacao Brasileira das Sociedades de Ginecologia e Obstetricia · 2022
    Pooled it
  4. Trial
  5. Trial
  6. Should we still treat asymptomaticSexually transmitted infections · 2026
    Article
  7. Article
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  9. AFrontiers in immunology · 2026
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  15. Community-Based Pilot Study ofMedicina (Kaunas, Lithuania) · 2025
    Article
  16. Biomedicines · 2025
    Article
  17. Article
  18. Article
  19. Article
  20. Journal of bacteriology · 2025
    Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors.

Casper D J den HeijerDivision of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Heerlen.
Christian J P A HoebeDepartment of Sexual Health, Infectious Diseases and Environmental Health, Public Health Service South Limburg, Heerlen.
Johanna H M DriessenDivision of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Heerlen.
Petra WolffsDepartment of Medical Microbiology,Care and Public Health Research Institute (CAPHRI), Maastricht University Medical Center+ (MUMC+), Maastricht.
Ingrid V F van den BroekEpidemiology and Surveillance Unit, Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands.
Bernice M HoenderboomEpidemiology and Surveillance Unit, Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands.
Rachael WilliamsClinical Practice Research Datalink, Medicines and Healthcare Products Regulatory Agency, London, United Kingdom.
Frank de VriesDivision of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Heerlen.
Nicole H T M Dukers-MuijrersDepartment of Sexual Health, Infectious Diseases and Environmental Health, Public Health Service South Limburg, Heerlen.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundWe evaluated the risk of pelvic inflammatory disease (PID), ectopic pregnancy, and infertility in women with a previous Chlamydia trachomatis (CT) diagnosis compared with women who tested negative for CT and CT untested women, considering both targeted and incidental (ie, prescribed for another indication) use of CT-effective antibiotics.

methodsThis was a retrospective study of women aged 12-25 years at start of follow-up within the Clinical Practice Research Datalink GOLD database linked to index of multiple deprivation quintiles, 2000-2013. CT test status and antibiotic use were determined in a time-dependent manner. Risk of PID, ectopic pregnancy, or female infertility were evaluated using of Cox proportional hazard models.

resultsWe studied 857 324 women, contributing 6 457 060 person-years. Compared with women who tested CT-negative, women who tested CT-positive had an increased risk of PID (adjusted hazard ratio [aHR], 2.36; 95% confidence interval [CI], 2.01-2.79), ectopic pregnancy (aHR, 1.87; 95% CI, 1.38-2.54), and infertility (aHR, 1.85; 95% CI, 1.27-2.68). The PID risk was higher for women with 2 or more positive CT tests than those with 1 positive test. PID risk increased with the number of previous antibiotic prescriptions, regardless of CT test status.

conclusionsWe showed an association between CT-positive tests and 3 adverse reproductive health outcomes. Moreover, this risk increased with repeat CT infections. CT-effective antibiotic use showed no decreased risks of subsequent PID regardless of CT history. Our results confirm the reproductive health burden of CT, which requires adequate public health interventions.

Indexed as

AdolescentAdultAnti-Bacterial AgentsChildChlamydia trachomatisFemaleHumansInfertility, FemalePelvic Inflammatory DiseasePregnancyPrimary Health CareProportional Hazards ModelsRetrospective StudiesRisk FactorsYoung AdultAnti-Bacterial Agentsadverse reproductive healthantibioticsChlamydia trachomatisCPRD

Identifiers

PMID31504315
PMCPMC6792126

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Registered trials

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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.