Evidence map›Paper›PMID 38551099›Full record

ArticleEuro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin2024

Questioning risk compensation: pre-exposure prophylaxis (PrEP) and sexually transmitted infections among men who have sex with men, capital region of Denmark, 2019 to 2022.

Sebastian von Schreeb, Susanne Kriegel Pedersen, Hanne Christensen, Kristina Melbardis Jørgsensen, Lene Holm Harritshøj, Frederik Boetius Hertz, Magnus Glindvad Ahlström, Anne-Mette Lebech, Suzanne Lunding, Lars Nørregaard Nielsen and 3 more

Open access · diamondAbstract read
In one paragraph

Article in Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
7.3field-weighted citation impact, top 2% 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

15 citing papers in PubMed, 19 citations in OpenAlex.

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  8. Observational
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  10. Canadian Public Health Laboratory Network National Syphilis In-Laboratory Serological Testing Recommendations.Journal of the Association of Medical Microbiology and Infectious Disease Canada = Journal officiel de l'Association pour la microbiologie medicale et l'infectiologie Canada · 2025
    Review
  11. Preventing HIV in women in Africa.Nature medicine · 2025
    Review
  12. Article
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  14. Article
  15. Contextualized Experiences and Predictors of Condom Use in a Flemish Population: A Mixed Methods Study.International journal of environmental research and public health · 2024
    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

13 authors at 5 institutions in 1 country.

Sebastian von SchreebDepartment of Infectious Diseases, Copenhagen University Hospital - Amager and Hvidovre, Copenhagen, Denmark.
Susanne Kriegel PedersenDepartment of Infectious Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
Hanne ChristensenDepartment of Infectious Diseases, Copenhagen University Hospital - Amager and Hvidovre, Copenhagen, Denmark.
Kristina Melbardis JørgsensenDepartment of Clinical Microbiology, Copenhagen University Hospital - Amager and Hvidovre, Copenhagen, Denmark.
Lene Holm HarritshøjDepartment of Clinical Immunology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
Frederik Boetius HertzDepartment of Clinical Microbiology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
Magnus Glindvad AhlströmDepartment of Clinical Microbiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.
Anne-Mette LebechDepartment of Infectious Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
Suzanne LundingDepartment of Internal Medicine, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.
Lars Nørregaard NielsenDepartment of Pulmonary and Infectious Diseases, Copenhagen University Hospital - North Zealand Hospital, Copenhagen, Denmark.
Jan GerstoftDepartment of Infectious Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
Gitte KronborgDepartment of Infectious Diseases, Copenhagen University Hospital - Amager and Hvidovre, Copenhagen, Denmark.
Frederik N EngsigDepartment of Infectious Diseases, Copenhagen University Hospital - Amager and Hvidovre, Copenhagen, Denmark.
Copenhagen University Hospital · DKAmager Hospital · DKUniversity of Copenhagen · DKGentofte Hospital · DKStatens Serum Institut · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BackgroundPre-exposure prophylaxis (PrEP) effectively prevents HIV, but its association with sexually transmitted infections (STIs) has raised concerns about risk compensation, potentially impacting the expansion of PrEP programmes.AimWe examined the relationship between PrEP and the incidence of chlamydia, gonorrhoea and syphilis.MethodsIn this prospective cohort study, we compared STI rates before and after PrEP initiation among users in the capital region of Denmark (2019-2022), calculating incidence rate ratios adjusted for age and testing frequency (aIRR). To pinpoint when increases began, we plotted weekly STI rates, adjusting the timeline to correspond with PrEP initiation.ResultsThe study included 1,326 PrEP users with a median age of 35 years. The STI incidence rate per 100,000 person-years rose from 35.3 before to 81.2 after PrEP start, with an aIRR of 1.35 (95% CI: 1.18-1.56). Notably, this increase preceded PrEP initiation by 10-20 weeks. Specific aIRR for chlamydia, gonorrhoea and syphilis were 1.23 (95% CI: 1.03-1.48), 1.24 (95% CI: 1.04-1.47) and 1.15 (95% CI: 0.76-1.72), respectively. In subanalyses for anatomical sites aIRR was 1.26 (95% CI: 1.01-1.56) for rectal chlamydia and 0.66 (95% CI: 0.45-0.96) for genital gonorrhoea.ConclusionWe found a 35% increase in STI incidence associated with PrEP use. It started before PrEP initiation, challenging the assumption that PrEP leads to risk compensation. Instead, the data suggest that individuals seek PrEP during periods of heightened sexual risk-taking. Consequently, PrEP programmes should include sexual health consultations, STI testing, treatment and prevention strategies to prevent HIV and improve sexual health.

Indexed as

Chlamydia InfectionsGonorrheaHIV InfectionsPre-Exposure ProphylaxisSexual and Gender MinoritiesSexually Transmitted DiseasesSyphilisAdultDenmarkHomosexuality, MaleHumansMaleProspective StudiesChlamydiaGonorrheaHIVPre-exposure ProphylaxisPrEP, Gonorrhoearisk compensationSyphilis

Identifiers

PMID38551099
PMCPMC10979528
OpenAlexW4393354149

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.