Categories
EMIS 2017 Journal Articles 2017 Published Articles

Using Survey Data to Understand the Health Needs of Difficult to Reach Populations : Evidence from a Community Survey Regarding the Individual and Contextual Correlates of Sex Life Happiness among European MSM

Policy Research Working Paper; 11382, 2026. Washington, D.C.: World Bank Group.

Authors: Alexander Hamilton, Ford Hickson, Axel J Schmidt

Abstract

Being happy with one’s sex life is an important facet of sexual health. Several studies have found associations between sex life happiness and a range of individual (or proximate) and contextual (usually country-level) factors amongst men who have sex with men (MSM).

Using a novel dataset, the 2017 European Men-Who-Have-Sex-With-Men Internet Survey (EMIS-2017), we are able to simultaneously explore the association of both individual and contextual variables, and sex life happiness, and, ultimately, health. Understanding and quantifying this link is important for policymakers concerned with improving health outcomes in minority, and often marginalised, populations.

Recency of sex and/or being in a steady sexual relationship had the largest positive associations with higher self-reported sex life happiness. Being single had the largest negative association. Among individual-level factors, not having experienced homophobia and being out to a majority of one’s social network were most strongly associated with sex-life happiness. At the country-level, there is evidence that living in a country with a more authoritarian political regime is associated with less sex life happiness. Mediation analysis shows that authoritarian regimes are also indirectly negatively associated with sex life happiness via the likelihood of being open about one’s sexuality. Our study provides a strong basis for further research exploring the potentially complex associations between proximate and contextual variables in determining sex life happiness amongst MSM populations.

Available online

Categories
EMIS 2024 Journal Articles 2024 Published Articles

European Men-Who-Have-Sex-With-Men Internet Survey (EMIS-2024): Design and Methods

Sexuality Research and Social Policy, 2026 (doi:10.1007/s13178-026-01288-8).

Authors: Liana Aphami, Tamás Bereczky, Jules L Casalini, Nikolay Lunchenkov, Ulrich Marcus, Kai J Jonas, Axel J Schmidt.

Abstract

Introduction. Men-who-have-sex-with-men (MSM), as well as transgender and non-binary individuals, continue to face a disproportionate burden of stigma, mental health challenges, HIV, and other sexually transmitted infections. To address their needs, public health planners require reliable and comparable data. Monitoring behaviours in these populations also supports the evaluation of health policies.

Methods. The European-MSM-Internet-Survey (EMIS-2024) builds on our international surveys conducted in 2010 and 2017, expanding its scope to include explicitly transgender women and non-binary people. It provides much-needed data for planning interventions, promoting health, and harmonising behavioural surveillance. A key strength of EMIS-2024 is the use of a shared sampling frame and a core questionnaire across all participating countries. This approach allows meaningful cross-national comparisons, unlike many national surveys with varying methods. The three core consortium partners (Deutsche Aidshilfe, Robert Koch Institute and Maastricht University) led the revision of the EMIS-2017 questionnaire.

Results. Over 60 partners from 40 countries played a key role in the survey’s success, providing high-quality translations in 35 languages and actively promoting the survey. National partners ensured the survey’s visibility, credibility, and relevance once dating app advertisements or invitations appeared. The survey ran online during the first half of 2024. Overall, 165,380 responses were received, of which 50,330 qualified for the analytic sample.

Conclusions and Policy Implications. EMIS-2024 demonstrates that large-scale, multi-country sexual health surveys are feasible with public funding. A harmonised questionnaire, shared sampling strategy, and meaningful community involvement were key to generating robust, comparable data across Europe.

Country groupings used in EMIS-2024. For analytical purposes in the methods paper, countries are grouped as follows. We suggest this structure as a useful framework for international comparative analyses and journal articles:

  • EEA: Countries of the European Economic Area.
  • Non-EEA Advanced Economies: High-income countries outside the EEA within the WHO European Region (including Switzerland, Israel, and the United Kingdom), based on the International Monetary Fund (IMF) classification of advanced economies.1
  • Western Balkans & Türkiye: Non-EEA countries in south-eastern Europe.
  • Eastern Europe and Central Asia (EECA): Non-EEA countries of the former Soviet Union.

This grouping facilitates epidemiological interpretation and comparability of trends across countries with markedly different economic conditions and epidemiological profiles. The grouping also reflects differences in study coordination and funding arrangements across participating countries and regions.

Available online

Suggested citation:

Aphami L, Bereczky T, Casalini JL, Lunchenkov N, Marcus U, Jonas KJ, Schmidt AJ. European Men-Who-Have-Sex-With-Men and Trans People Internet Survey (EMIS-2024): Design and Methods. Sex Res Soc Policy (2026). https://doi.org/10.1007/s13178-026-01288-8

  1. “Advanced economies” follow the International Monetary Fund’s World Economic Outlook country classification (International Monetary Fund, World Economic Outlook Database: Country Composition of WEO Groups). Alternatively, the term “non-EEA high-income countries” may be used to distinguish between EEA and non-EEA high-income countries, based on the World Bank country classification (World Bank. World Bank Country and Lending Groups). ↩︎
Categories
EMIS 2017 Journal Articles 2017 Published Articles

Prevalence and associated factors of selling sex among men who have sex with men (MSM) in Latin America: results from the Latin American MSM Internet Survey in 18 countries (LAMIS-2018)

BMJ Global Health, 10:e021058, 2025 (doi:10.1136/bmjgh-2025-021058).

Authors: Mariano Salazar, Nicolas Lorente, Axel J Schmidt, Kai Jonas, Signe Svallfors, Anna Mia Ekström, Torsten Berglund, Carlos F Cáceres, Susanne Strömdahl, Valeria Stuardo, Jordi Casabona

Introduction: Selling sex has been associated with negative social and health outcomes, but most studies have been limited geographically and have not distinguished between selling and buying sex. This study assesses prevalence and factors associated with selling sex in the last 12 months among men who have sex with men (MSM) in 18 Latin American countries.

Methods: Data were collected in 2018 through the Latin American MSM Internet Survey, a cross-­ sectional online survey. Of 64 655 participants, 9585 were excluded due to data inconsistencies on age and partner status, and 1728 due to missing outcome data, yielding an analytic sample of 53 342. Multivariable logistic regression was used for analysis.

Results: Overall, 6.9% (10.3% among MSM aged 18–24) reported selling sex in the previous year. Higher odds of selling sex were associated with younger age, low education, being born abroad, low financial coping, substance use, potential alcohol dependency, early sexual debut with a male partner, low sexual agency and sex with women. High educational level and having a steady male partner were associated with lower odds.

Conclusions: Key factors associated with selling sex among MSM in Latin America include socioeconomic, behavioural and relational variables. Harm reduction and preventive interventions may be particularly needed among younger MSM. Codeveloping these interventions with the MSM community can ensure sustainability, relevance and strengthen providers’ ability to offer individualised, respectful care. Longitudinal and qualitative studies are needed to monitor long-­ term health and tailor interventions to individual needs.

Available online

Categories
EMIS 2017 Journal Articles 2017 Published Articles

Modelling the health and cost implications of expanded access to HIV, HCV and sexually transmitted infection testing in Switzerland

Swiss Medical Weekly, 155(12):4581, 2025 (doi:10.57187/s.4581).

Authors: Harsh Vivek Harkare, Marina Antillón, Axel J. Schmidt, Fabrizio Tediosi

Background: This study was conducted as part of the Swiss National Programme to Stop HIV, Hepatitis B Virus, Hepatitis C Virus and Sexually Transmitted Infections (NAPS), which aims to reduce the spread of sexually transmitted infections in Switzerland. The goal was to identify the most effective and cost-efficient screening strategies to lower the incidence of human immunodeficiency virus (HIV), hepatitis C virus (HCV), syphilis, Neisseria gonorrhoeae and Chlamydia trachomatis by improving access to screening.

Methods: A Markov model was developed to assess the impact of various screening strategies among key populations over two years, including men who have sex with men (MSM), female sex workers (FSW) and people who inject drugs (PWID). The model further stratifies individuals based on partner number (MSM) and injection-equipment sharing (PWID). Comprehensive cost estimates for screening and treatment were derived from insurance data, literature and expert opinions. The effectiveness of screening interventions was evaluated by measuring reductions in disease incidence and cost savings, comparing the costs of screening to those of acute and chronic care for prevented infections.

Results: Increased screening frequency among key populations led to a reduction in incidence for all five infections studied. The largest effect was seen in people who inject drugs who share injecting equipment, where HCV incidence fell by up to 76% with four annual screens. However, only screening for HIV, HCV and syphilis proved to be cost-saving. Screening for Chlamydia trachomatis and Neisseria gonorrhoeae consistently incurred net costs due to the high screening costs and relatively low treatment costs.

Conclusion: Targeted expansion of screening among key populations can reduce the incidence of HIV, HCV and syphilis in Switzerland, with regular screening offering potential cost savings to insurers under specific coverage and treatment scenarios.

Available online

Categories
EMIS 2024 Published Articles

On the regional distribution of chemsex in Germany

Authors: Dirk Sander & Axel J Schmidt.

Suggested citation: Sander D, Schmidt AJ (2025). Zur regionalen Verbreitung von Chemsex in Deutschland (EMIS-2024). Deutsche Aidshilfe, Berlin.

Abstract:

Chemsex—the use of psychoactive stimulant substances to enhance and prolong sexualised social encounters—has become a significant public health issue in recent years. Member organisations of the AIDS service sector have implemented targeted support services and provide education and training for counselling, care, and peer-led self-help.

For the planning and delivery of health interventions, it is essential to understand how many people are affected by health impairments associated with substance use in sexual settings. Such information determines the level and distribution of resources required across prevention, counselling, self-help, and therapeutic services in order to prevent or reduce health-related harms.

Accordingly, this analysis uses data from EMIS-2024, together with population estimates, to describe the prevalence of chemsex-related behaviours in Germany, differentiated by federal states and selected larger cities.

Our calculations indicate that the alignment between existing services and potential needs points to a marked underprovision. Existing services should therefore be expanded and new approaches developed. These approaches must be capable of reducing existing stigma related to (homo)sexuality and substance use, thereby facilitating access to services for those affected.

Available online in German, as a longer text with literature, and as a poster.

See also the German-language news segment produced by Hessischer Rundfunk, with a more focused version available on YouTube.

The Chemsex Emergency We Refuse to Acknowledge

Co-author Dirk Sander published another article on the topic in the German men’s health magazine Checkmag on 4 May 2026, titled The Chemsex Emergency We Refuse to Acknowledge (Notfall Chemsex: Was wir nicht sehen wollen).

The article argues that chemsex is too often treated as a moral failure rather than a public health and social issue. It criticises the tendency to only discuss drug use once it has already become a crisis, which reinforces shame and discourages people from seeking help.

The author explains that chemsex—the use of psychoactive drugs to intensify or prolong sex—is closely linked to modern urban gay culture, dating apps, and the shift from public nightlife into private spaces. Rather than being a fringe phenomenon, it is presented as part of broader social and cultural changes.

A central point of the article is that people often use substances for understandable emotional and social reasons: to reduce inhibitions, cope with shame, feel intimacy, or experience belonging. According to the article, many gay men involved in chemsex have histories of exclusion or internalised shame related to sexuality. Drugs can temporarily ease these feelings, but stigma often deepens the cycle of isolation afterwards.

The piece also highlights the hidden scale of the problem. It cites estimates suggesting that around 50,000 gay and bisexual men in Germany are affected by problematic involvement in chemsex. Consequences can include overdoses, anxiety, depression, psychological crises, and suicide—yet many cases remain invisible because affected people fear judgment and therefore avoid seeking support.

Finally, the article calls for a shift in perspective: away from moral condemnation and toward understanding, harm reduction, and structured support systems. The author argues that chemsex should be treated as a health, social, and cultural issue requiring better counselling, therapy services, and national emergency plans.

Categories
EMIS 2017 Journal Articles 2017 Published Articles

Levels of Homonegative Abuse Among Men Who Have Sex with Men in Peru and Their Association with STI and/or HIV Testing: An Analysis from the Latin American Men Internet Survey

International Journal of Sexual Health, 2025 (doi: 10.1080/19317611.2025.2573694).

Authors: Joselito Malca-Hernandez, Michael Reyes-Diaz, Axel J Schmidt & Carlos F. Caceres

Abstract

Objectives: To examine the prevalence and geographic distribution of homonegative abuse (HA) among men who have sex with men (MSM) in Peru and its association with HIV/STI testing.

Methods: We analyzed data from 1,934 MSM from Peru who participated in the 2018 Latin American Men Internet Survey (LAMIS). We assessed the prevalence and geographic distribution of HA (intimidation, verbal abuse, and physical violence due to sexual orientation) across four macro-regions: Lima/Callao, Coast, Highlands, and Amazonia. Associations with sociodemographic characteristics and HIV/STI testing behavior were explored through comparative analyses, using prevalence ratios adjusted for key sociodemographic variables.

Results: Approximately 61% of participants reported HA in the previous year. Intimidation (56%) was the most common, followed by verbal abuse (34%) and physical violence (4%).HA was more prevalent in the Coast (67%) and Highlands (66%) than in Lima/Callao (59%). Factors positively associated with recent HA included younger age, financial hardship, lower education, gay identity, and high levels of outness. No significant association was found between HA and HIV/STI testing.

Conclusions: HA is prevalent among Peruvian MSM, especially outside the capital macro-region (Lima/Callao). These findings highlight the need for further research to investigatewhether specific sources of HA may be linked to reduced use of sexual healthcare services among MSM in Peru and support targeted interventions addressing the sociocultural contexts that perpetuate abuse against MSM in Peru.

Available online

Categories
EMIS 2017 Journal Articles 2017 Published Articles

PrEP Coverage in men who have sex with men in Germany across 95 regions

German-Austrian AIDS Conference (DÖAK) 2025. Poster Nr. 194.

Authors: Axel J Schmidt, Daniel Schmidt, Dirk Sander, Silke Klumb.

Abstract

Background. Pre-exposure prophylaxis (PrEP) is a highly effective biomedical intervention for HIV prevention. 
Its adaption among men-who-have-sex-with-men (MSM) is vital for achieving public health goals. 

This study assesses PrEP coverage across 95 postal code areas (PCAs) in Germany, identifying underserved regions and visualising supply-demand gaps using geographic data. 

Methods: We used geo data from the German Ministry of Health (gesund.bund.de) to locate physicians qualified to prescribe PrEP under statutory health insurance (supply). 

MSM populations (excluding HIV-diagnosed men) engaging in anal sex with multiple partners in the same regions (demand) were estimated (EMIS-2017 data). Standardisedsupply-demand ratios (SSDRs) were calculated, ranging from 0 to 1.

Postal code areas for Berlin (10,12,13), Hamburg (20,22), Munich (80,81), and Ruhr (44,45) were merged for the maps.

Findings: By Q3/2024, 455 physicians across Germany were prescribing PrEP. The highest MSM concentrations were in postal code areas 10xxx (Berlin; k=10.7), 20xxx (Hamburg; k=6.8), and 80xxx (Munich; k=4.0). Despite large prescriber numbers in these three cities (N=79, N=31, and N=32), SSDRs were moderate (0.39, 0.50, and 0.47). 

Conversely, the highest SSDRs were observed in areas with lower MSM concentrations, including PCAs 54xxx (Trier), 77xxx (Offenburg), 93xxx (Regensburg), and 39xxx (Magdeburg). Notably, 21 PCAs had no qualified prescribers, and 20 had only one.

Interpretation: PrEP supply is uneven across Germany, with better coverage in some regions with lower MSM concentrations but strong engagement from community organisations, while many major cities remain underserved. 

Addressing these disparities requires targeted efforts to increase the number of PrEP prescribers, particularly in urban hubs with significant MSM populations. Improved planning is crucial to ensure equitable access and reduce HIV transmission nationwide.

Available online

Categories
EMIS 2017 Journal Articles 2017 Published Articles

Self-reported hepatitis A and B vaccination coverage among men who have sex with men (MSM), associated factors and vaccination recommendations in 43 countries of the WHO European Region: results from the European MSM Internet Survey, EMIS-2017

EuroSurveillance, 2024; 29(45):pii=2400100 (doi: 10.2807/1560- 7917.ES.2024.29.45.2400100).

Authors: Michael Brandl, Axel J Schmidt, Ulrich Marcus, Erika Duffell, Ettore Severi, Antons Mozalevskis, Anda Kivite-Urtane, Matthias an der Heiden, Sandra Dudareva.

Abstract

Background. Hepatitis A and B vaccinations are recommended for men who have sex with men (MSM), given their increased risk of infection. However, data on vaccination programmes are scarce.

Aim. To use information on vaccination recommendations and vaccine uptake among MSM in the WHO European Region to guide prevention.

Methods. From a large pan-European MSM Internet Survey (EMIS-2017), we analysed data on self-reported hepatitis A and B vaccination status by age, education, financial coping, settlement size, outness (disclosure of sexual behaviour), migration history and diagnosis with hepatitis C or HIV, using multivariable logistic regression. Additionally, we collected information on national hepatitis A and B vaccination recommendations.

Results. We present data of 113,884 MSM, median age 36 years (IQR: 27–47). Vaccination for hepatitis A and B was recommended and free for MSM in 7 and 18 of 43 countries, respectively. Of all respondents, 48% (n = 50,966) reported ever being vaccinated against hepatitis A, and 53% (n = 56,889) against hepatitis B. Odds for being vaccinated against hepatitis A increased with outness (‘out to (almost) all’ aOR: 1.78, 95% CI: 1.72–1.85 vs ‘out to none’) and were higher in countries where vaccination was recommended and free for MSM (aOR:2.22, 95% CI: 1.29–3.82 vs ‘no recommendation’). Results for hepatitis B were similar (outness: aOR:1.81, 95%CI:1.75–1.88 and MSM-specific vaccination recommendation: aOR: 2.44, 95% CI: 1.54–3.85).

Conclusion. Large proportions of MSM in Europe remain vulnerable to hepatitis A and B, despite available vaccination. Implementation of MSM-specific vaccination recommendations and greater efforts to improve the societal climate for MSM are needed to address gaps in vaccine coverage.

Available online

Categories
EMIS 2017 Journal Articles 2017 Published Articles

Viral hepatitis knowledge and vaccination awareness among men who have sex with men (MSM) in 43 countries of the WHO European Region: results from the European MSM Internet Survey, EMIS-2017

EuroSurveillance, 2024; 29(45):pii=2400099 (doi: 10.2807/1560-7917.ES.2024.29.45.2400099).

Authors: Sofia Burdi, Michael Brandl, Ulrich Marcus, Erika Duffell, Ettore Severi, Antons Mozalevskis, Kristi Rüütel, Achim Dörre, Axel J Schmidt*, Sandra Dudareva*.

Abstract

Background. Recent hepatitis A virus outbreaks in Europe affecting men who have sex with men (MSM) and ongoing hepatitis B virus transmission among MSM underscore the ongoing need for viral hepatitis prevention in this population.

Aim. To describe viral hepatitis knowledge and associated factors among MSM in the WHO European Region to inform targeted prevention.

Methods. In the European MSM Internet Survey (EMIS-2017), basic knowledge was defined as correctly identifying at least 4 of 5 statements about viral hepatitis and vaccination. We described basic knowledge by country. In a multilevel logistic regression model, we estimated adjusted odds ratios (aOR) with 95% confidence intervals (CI) for having basic knowledge and explanatory variables: sociodemographic characteristics, history of hepatitis C and/or HIV diagnosis, sexual orientation disclosure at last sexually transmitted infections (STI) test and outness..

Results. Of 113,884 participants across 43 WHO European Region countries, 68% demonstrated basic knowledge, ranging from 50% in Israel to 80% in the Netherlands. Basic knowledge was significantly associated with older age (≥ 40 years vs < 25 years, aOR: 2.9, 95% CI: 2.7–3.0), a history of hepatitis C and/or HIV diagnosis (aOR:1.8, 95% CI: 1.7–1.9) and sexual orientation disclosure at last STI test (aOR: 1.3, 95% CI: 1.2– 1.3), among other factors.

Conclusion. We found a knowledge disparity regard- ing viral hepatitis and hepatitis vaccination aware- ness among MSM across Europe, highlighting a need to address these gaps. A non-judgemental, accept- ing climate that allows individuals attending medical services to safely disclose their sexual orientation is fundamental to enable healthcare professionals to target information and preventative measures more effectively.

Available online

Categories
EMIS 2017 Journal Articles 2017 Published Articles

Sex work, syndemic conditions and condomless anal intercourse among MSM who engage in sex work in Latin America

Sexual Health, 2024; 21, SH23112 (doi: 10.1071/SH23112).

Authors: Ibrahim Sönmez, Nicolas Lorente, Jocelyn Mesías-Gazmuri, Axel J. Schmidt, Kai J. Jonas, Valeria Stuardo Avila, Ulrich Marcus, Maria Amelia Veras, Jordi Casabona Barbarà, Cinta Folch.

Abstract

Background. In Latin American countries and Suriname, sexual transmission is one of the most common modes of HIV transmission, and men who have sex with men (MSM) who engage in sex work constitute a key population.

Methods. In a sample of MSM (N = 53,166) from the Latin American Internet Survey (2018) across 18 countries, we examined how sex work engagement is associated with syndemic conditions (multidrug use, homophobic abuse, depression/anxiety, alcohol dependency (CAGE alcohol questionnaire) and internalised homonegativity) and condomless anal intercourse with non-steady male partners using separate logistic regressions. We then used a structural equation model to determine if and how syndemic conditions mediate the relationship between sex work engagement and non-steady male partners.

Results. We found that getting paid for sex was associated with less condom use for anal intercourse with non-steady male partners and particular syndemic conditions, such as multidrug use, homophobic abuse and alcohol dependency. In our structural equation model, the results showed that the direct relationship between sex work engagement and non-steady male partners was positive and significant, and syndemic conditions partially mediated this relationship.

Conclusion. Our results highlight the continuing need for including MSM who engage in sex work and those who experience syndemic conditions in the prevention strategies targeted to MSM in Latin America and Suriname, to prevent the transmission of HIV.

Available online