11.6% MSM reported ever engaging in group sex and 36.2% participants reported UAI with non-regular male partners in the past 12 months.
Of the 1122 participants included in the study, 24.1% reported a history of poppers use.
Logistic regression analysis was performed to explore factors correlated with sexual risk behaviors including group sex and unprotected anal intercourse (UAI). Anonymous questionnaire survey was administered to collect data on demographics, drug use, sexual behaviors, history of STIs and HIV infection. This cross-sectional study was conducted in three cities of southwestern China between July and September 2016. To investigate the prevalence of poppers use and its relationship with sexual risk behaviors among men who have sex with men (MSM) in southwestern China.