SynthesisThe Lancet. Global health2019
Circumcision to prevent HIV and other sexually transmitted infections in men who have sex with men: a systematic review and meta-analysis of global data.
Synthesis in The Lancet. Global health, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 54 papers, 9 of them syntheses that pooled 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.
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.
Who cites it
54 citing papers in PubMed, 9 syntheses or guidelines pooled it, 120 citations in OpenAlex.
- Circumcision for HIV Prevention in Men Who Have Sex With Men: An Updated Meta-Analysis.Journal of acquired immune deficiency syndromes (1999) · 2026Pooled it
- Vancomycin-resistant Enterococcus prevalence and its association along the food chain: a systematic review and meta-analysis.The Journal of antimicrobial chemotherapy · 2025Pooled it
- Urban and Rural Disparities in COVID-19 Outcomes in the United States: A Systematic Review.Medical care research and review : MCRR · 2025Pooled it
- Pooled it
- Timing of Goals of Care Discussions in Nursing Homes: A Systematic Review.Journal of the American Medical Directors Association · 2023Pooled it
- Spiraling Risk: Visualizing the multilevel factors that socially pattern HIV risk among gay, bisexual & other men who have sex with men using Complex Systems Theory.Current HIV/AIDS reports · 2023Pooled it
- Sexually Transmitted Infections Treatment Guidelines, 2021.MMWR. Recommendations and reports : Morbidity and mortality weekly report. Recommendations and reports · 2021Guideline
- Peer education for HIV prevention among high-risk groups: a systematic review and meta-analysis.BMC infectious diseases · 2020Pooled it
- Critical evaluation of arguments opposing male circumcision: A systematic review.Journal of evidence-based medicine · 2019Pooled it
- Barriers and Facilitators to, and Experience of, Voluntary Medical Male Circumcision Among Men Who Have Sex with Men in China: A Mixed-Methods Study.Archives of sexual behavior · 2023Trial
- ART is key to clearing oncogenic HPV genotypes (HR-HPV) in anal mucosa of HIV-positive MSM.PloS one · 2019Trial
- Does the evidence support circumcision of infant males in the United Kingdom?-a systematic review.Translational andrology and urology · 2026Review
- Prevalence and Behavioral Factors Associated with Penile and Rectal HPV Infection among Men Who Have Sex with Men in Kenya.Research square · 2026Article
- Caregiver acceptability, and uptake of voluntary medical circumcision among male children under 5 years in Gulu city, Northern Uganda.Scientific reports · 2026Article
- Sexually transmitted infection prevalence and Neisseria gonorrhoeae antimicrobial resistance patterns in men who have sex with men with or without urethral discharge syndrome in Johannesburg, South Africa, 2024.PLOS global public health · 2026Article
- Factors Associated with Condomless Anal Sex and Absence of Pre-Exposure Prophylaxis (PrEP) Use Among Brazilian Men Who Have Sex with Men: A Cross-Sectional Study.Infectious disease reports · 2025Article
- Review
- Pre-exposure Prophylaxis (PrEP) Awareness and Engagement Among MSM at High Risk of HIV Infection in China: A Multi-City Cross-Sectional Survey.AIDS and behavior · 2025Article
- It Is a Catch-22 Situation! A Decade of Research Trends on Gay Wellbeing in China: A Bibliometric Analysis.Behavioral sciences (Basel, Switzerland) · 2025Review
- Empathy in Action: Black Bioethics and the Role of Care Ethics in HPV Prevention and Education in Underserved Communities.Journal of healthcare, science and the humanities · 2025Article
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Authors and funding
21 authors at 12 institutions in 4 countries.
Funding
Abstract
backgroundMen who have sex with men (MSM) are disproportionately affected by HIV and other sexually transmitted infections (STIs) worldwide. Previous reviews investigating the role of circumcision in preventing HIV and other STIs among MSM were inconclusive. Many new studies have emerged in the past decade. To inform global prevention strategies for HIV and other STIs among MSM, we reviewed all available evidence on the associations between circumcision and HIV and other STIs among MSM.
methodsIn this systematic review and meta-analysis, we searched PubMed, Web of Science, BioMed Central, Scopus, ResearchGate, Cochrane Library, Embase, PsycINFO, Google Scholar, and websites of international HIV and STI conferences for studies published before March 8, 2018. Interventional or observational studies containing original quantitative data describing associations between circumcision and incident or prevalent infection of HIV and other STIs among MSM were included. Studies were excluded if MSM could not be distinguished from men who have sex with women only. We calculated pooled odds ratios (ORs) and their 95% CIs using random-effect models. We assessed risk of bias using the Newcastle-Ottawa scale.
findingsWe identified 62 observational studies including 119 248 MSM. Circumcision was associated with 23% reduced odds of HIV infection among MSM overall (OR 0·77, 95% CI 0·67-0·89; number of estimates [k]=45; heterogeneity I
interpretationWe found evidence that circumcision is likely to protect MSM from HIV infection, particularly in countries of low and middle income. Circumcision might also protect MSM from HSV and penile HPV infection. MSM should be included in campaigns promoting circumcision among men in countries of low and middle income. In view of the substantial proportion of MSM in countries of low and middle income who also have sex with women, well designed longitudinal studies differentiating MSM only and bisexual men are needed to clarify the effect of circumcision on male-to-male transmission of HIV and other STIs.
fundingNational Natural Science Foundation of China, National Science and Technology Major Project of China, Australian National Health and Medical Research Council Early Career Fellowship, Sanming Project of Medicine in Shenzhen, National Institutes of Health, Mega Projects of National Science Research for the 13th Five-Year Plan, Doris Duke Charitable Foundation.
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Registered trials
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.