HIV/STI monitoring and evaluation among hidden populations. Centre d'Estudis Epidemiològics sobre les Infeccions de Transmissió Sexual i Sida de Catalunya (CEEISCAT). Outline. Epidemiological surveillance in hidden populations. HIV-COBATEST project. Who are the hidden groups?.
Centre d'Estudis Epidemiològics sobre les Infeccions de Transmissió Sexual i Sida de Catalunya (CEEISCAT)
As part of integrated HIV/STI surveillance in Catalonia, Bio-Behavioural Surveillance was introduced in 1993.
Intravenous drug users
Men who have sex with men
Female commercial sex workers
To describe changing patterns in risk behaviours and HIV-testing behaviours.
To describe changing patterns in the prevalence of HIV and other Sexually transmitted Infections (STI).
To identify predictive variables of HIV/STI risk behaviours
Objectives of our surveillance system
Collaboration with NGOs that carried out the survey fieldwork
Non-probability sampling methods in key groups:
Methods: Where recruit hidden groups?
Anonymous questionnaires to explore risk behaviours:
MSM: Self-administered questionnaires were either conducted face to face by gay-association health educators in gay venues or mailed to the mailing list of a gay-community association, and returned by mail.
IDU: Face-to-face interviews were conducted by trained interviewers.
FSW: Face-to-face interviews were conducted by trained interviewers.
Methods: What instrument?
Biological samples (anonymous)
IDU, MSM, FSW
FSW, IDU (2008)
FSW, IDU (2008)
Direct sharing (last 6 months). IDU 1993-2006
Unprotected anal intercourse among MSM (1995-2008)
Samples are not probabilistic. Caution should be used in generalizing the findings.
Possible biases concerning memory and under-reporting of risk behaviours.
Cross-sectional study: cause-and-effect could not be established.
Applicability of the Bio-Behavioral Surveillance
Participation in European projects
2008-2010. SIALON: “Capacity building in HIV/syphilis prevalence estimation using non-invasive methods among MSM in Southern and Eastern Europe” (SIALON)
2009-2011. EMIS: “European MSM Internet survey on knowledge, attitudes and behavior as to HIV and STI” (EMIS)
Purpose and objectives
The purpose of the project is to promote early HIV diagnosis in Europe by means of improving the implementation, monitoring and evaluation of community-based counseling and testing practices (CBVCT)
The specific objectives are:
Associated Partner (10)
Collaborating Partner (14)