Risk factors for HIV and syphilis infection among male sex workers who have sex with men: a cross-sectional study in Hangzhou, China, BMJ Open ;5:e Design: Cross-sectional survey. Setting: Hangzhou, China. Outcome measures: HIV-related knowledge, high-risk behaviour and condom use. The rate of condom use while having commercial sex with clients was Regarding their non-commercial sex behaviour, the rate of condom use was AIDS has become a serious public health problem worldwide.
It has been estimated that there were approximately With the rapid economic development in China, the migrant population moving from rural areas to urban areas is increasing. The migrants are more likely to engage in high-risk sexual behaviour, have sexually transmitted infections STI and transmit HIV.
In this regard, the migrant subgroup of MSM, male sex workers MSWs known as 'money boys' MB , who engage in same-sex sexual activities for economic survival, has become a serious concern of the society. Specifically, we sampled the participants in the year This study was designed as a cross-sectional survey on MSW who provided commercial sex services including anal and oral sex to men from May to December in Hangzhou, China.
The original protocol was required to be sampled by a respondent-driven sampling RDS method. Since investigators were unable to obtain large enough sample sizes using RDS, all sampling was changed to the snowball methods and outreach convenience sampling provision of outreach service on-site, such as in bath-houses and clubs in the early phase of the study.
Signed informed consent was acquired from each participant. Participants were anonymised by assigning unique identification numbers. The survey questionnaire was based on that used in the national sentinel surveillance programme since ,. Information was obtained via one-on-one interviews by qualified investigators. The Center for Disease Control and Prevention staff who conducted the survey by interview were given intensive training and a detailed protocol. In addition, the rapid plasma regain test was used to identify the syphilis antibody in serum, and the spirochete antibody haemagglutination Treponema pallidum haemagglutin-ation test was adopted for confirmation.
