Skip Ribbon Commands
Skip to main content


Evidence of an explosive epidemic of HIV infection in a cohort of MSM in Bangkok, Thailand


F. v Griensven, W. Thienkrua, J. McNicholl, et al.

Network Affiliation




Journal Name


Publication Date


PubMed Search

Link to full-text





OBJECTIVE:: To assess HIV-prevalence, incidence and risk factors in a cohort of men who have sex with men (MSM) in Bangkok. DESIGN:: Cohort study with 4-monthly follow-up visits conducted between April 2006 and December 2011 at a dedicated study clinic in a central Bangkok hospital. Participants were 1744 homosexually active Thai men, ≥18 years old and residents of Bangkok. METHODS:: Men were tested for HIV-infection at every study visit and for sexually transmitted infections at baseline. Demographic and behavioural data were collected by audio-computer-assisted self-interview. Logistic regression analysis was used to evaluate risk factors for HIV-prevalence and Cox proportional hazard analysis to evaluate risk factors for HIV-incidence. RESULTS:: Baseline HIV-prevalence was 21.3% (n = 372) and 60 months cumulative HIV-free survival was 76.1% (n = 222). Overall HIV-incidence density was 5.9 per 100 person-years (PY). Multivariate risk factors for HIV-prevalence were older age, secondary/vocational education (vs. university or higher), employed or unemployed (vs. studying), nitrate inhalation, drug use for sexual pleasure, receptive anal intercourse, history of sexual coercion, no prior HIV-testing, and anti-HSV-1 and 2 and T. pallidum (TP) positivity at baseline. Multivariate risk factors for HIV-incidence were younger age, living alone or with roommate (vs. with a partner or family), drug use for sexual pleasure, inconsistent condom use, receptive anal intercourse, group sex, and anti-HSV-1 and 2 and TP positivity at baseline. Having no anal intercourse partners was inversely associated with HIV-incidence. CONCLUSIONS:: The high HIV prevalence and incidence in this cohort of Bangkok MSM documents an explosive epidemic. Additional preventive interventions for MSM are urgently needed.




Adolescents/Youth; Asian Pacific Islander; Behavior; Intervention; MSM; Novel Technologies; Risk Assessment; Substance Abuse


Created at 1/16/2013 10:49 AM by Davis, Gregory P
Last modified at 1/16/2013 10:49 AM by Davis, Gregory P