Sigma Research
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Sigma Research is a research group specialising in the social, behavioural and policy aspects of HIV and sexual health. It is part of the Faculty of Public Health and Policy at the London School of Hygiene & Tropical Medicine.

Systematic review on HIV prevention interventions for MSM

Systematic review on HIV prevention interventions for MSM

Ford Hickson and others have just published a systematic review that identifies studies evaluating the efficacy and effectiveness of HIV prevention interventions among men who have sex with men (MSM) in Europe.


HPE monitoring of Local Delivery

HPE monitoring of Local Delivery

Summary of monitoring data from all the Local Delivery Partners working as part of HIV Prevention England during 2014-15.

African Health & Sex Survey

African Health & Sex Survey

Available now in print or PDF, the final report of the African Health & Sex Survey. The survey recruited 1,000 African people in England.

Gay Men's Sex Survey 2014

Gay Men's Sex Survey 2014

Our survey closed in November 2014 with more than 16,000 men taking part. The final report will be available in May 2015.

Chemsex in south London

Chemsex in south London

Our Chemsex in South London final report and executive summary remains available for download.


Access to treatment among European MSM with diagnosed HIV

We have just published in PLoS One the reasons for not taking anti-retroviral treatment (ART) from EMIS, our large Pan-European Internet survey which included 13,353 MSM with diagnosed HIV living in more than 30 countries. A quarter (25.4%) had never received ART, but a small proportion (2.1%) had started and since stopped taking ART. Perceived lack of need was by far the most common reason for not taking or stopping ART (mentioned by 88.8%), followed by fear of consequences (11.7%), and ART inaccessibility (2.3%). For all reasons, an East-West gradient could be seen, with larger proportions of men living in Central and Eastern Europe reporting reasons other than medical advice for not taking ART. A minority were reluctant to start ART independent of medical advice and this was associated with experiences of discrimination in health care. ART is widely available for MSM diagnosed with HIV across Europe and not being on treatment is predominantly due to treatment not being recommended by their physician and/or not perceived to be needed by the respondent.