HIV prevalence among men who have sex with men in Brazil : results of the 2nd national survey using respondent-driven sampling

This paper reports human immuno-deficiency virus (HIV) prevalence in the 2nd National Biological and Behavioral Surveillance Survey (BBSS) among men who have sex with men (MSM) in 12 cities in Brazil using respondent-driven sampling (RDS). Following formative research, RDS was applied in 12 cities i...

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Bibliographic Details
Authors: Kerr, Ligia Regina Franco Sansigolo, Kendall, Carl, Guimarães, Mark Drew Crosland, Mota, Rosa Maria Salani, Veras, Maria Amélia, Dourado, Inês, Brito, Ana Maria de, Merchán-Hamann, Edgar, Pontes, Alexandre Kerr, Leal, Andrea Fachel, Knauth, Daniela Riva, Castro, Ana Rita Coimbra Motta, Macena, Raimunda Hermelinda Maia, Lima, Luana Nepomuceno Gondim Costa, Oliveira, Lisangela Cristina, Cavalcante, Maria do Socorro, Benzaken, Adele Schwartz, Pereira, Gerson, Pimenta, Cristina, Pascom, Ana Roberta Pati, Díaz Bermúdez, Ximena Pamela, Moreira, Regina Célia, Brígido, Luis Fernando Macedo, Camillo, Ana Cláudia, McFarland, Willi, Johnston, Lisa G.
Format: article
Status:Published version
Publication Date:2018
Country:Brasil
Institution:Universidade Federal do Rio Grande do Sul (UFRGS)
Repository:Repositório Institucional da UFRGS
Language:English
OAI Identifier:oai:www.lume.ufrgs.br:10183/179265
Online Access:http://hdl.handle.net/10183/179265
Access Level:Open access
Keyword:AIDS
HIV
Homossexuais
Homem
Medicina : Brasil
Brazil
Prevalence
MSM
Respondent-driven sampling
Description
Summary:This paper reports human immuno-deficiency virus (HIV) prevalence in the 2nd National Biological and Behavioral Surveillance Survey (BBSS) among men who have sex with men (MSM) in 12 cities in Brazil using respondent-driven sampling (RDS). Following formative research, RDS was applied in 12 cities in the 5 macroregions of Brazil between June and December 2016 to recruit MSM for BBSS. The target sample size was 350 per city. Five to 6 seeds were initially selected to initiate recruitment and coupons and interviews were managed online. On-site rapid testing was used for HIV screening, and confirmed by a 2nd test. Participants were weighted using Gile estimator. Data from all 12 cities were merged and analyzed with Stata 14.0 complex survey data analysis tools in which each city was treated as its own strata. Missing data for those who did not test were imputed HIV+ if they reported testing positive before and were taking antiretroviral therapy. A total of 4176 men were recruited in the 12 cities. The average time to completion was 10.2 weeks. The longest chain length varied from 8 to 21 waves. The sample size was achieved in all but 2 cities. A total of 3958 of the 4176 respondents agreed to test for HIV (90.2%). For results without imputation, 17.5% (95%CI: 14.7–20.7) of our sample was HIV positive. With imputation, 18.4% (95%CI: 15.4–21.7) were seropositive. HIV prevalence increased beyond expectations from the results of the 2009 survey (12.1%; 95%CI: 10.0–14.5) to 18.4%; CI95%: 15.4 to 21.7 in 2016. This increase accompanies Brazil’s focus on the treatment to prevention strategy, and a decrease in support for community-based organizations and community prevention programs.

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