title: [HIV infection incidence among men who have sex with men in common bathing pool in Tianjin: a cohort study].
abstract: OBJECTIVE
  To investigate incidence of HIV infection and identify associated risk factors among men who have sex with men (MSM) in common bathing pools in Tianjin.
  
  
  METHODS
  A prospective cohort study was conducted among the MSM recruited in a common bathing pool in Tianjin from 2011 to 2013. A total of 733 MSM were surveyed to obtain the information about their sociodemographic characteristics, HIV-related knowledge awareness and sexual behaviors, and subsequent follow-up surveys were carried out every four months. Cox regression analysis was conducted to identify the risk factors for HIV infection.
  
  
  RESULTS
  A total of 59 HIV infection cases were found in the 2.5-years follow-up survey. The cumulative follow-up time was 7384.9 person-months. The incidence rate of HIV infection was 9.59/100 person-year. The multivariate Cox regression analysis showed that young age, low score of HIV/AIDS knowledge awareness (HR=1.82, 95%CI:1.03-2.66), having two and more sexual partners during past 6 months (HR=1.74, 95%CI: 1.26-2.58) and syphilis (HR=2.36, 95%CI:1.31-3.27) were significantly associated with HIV infection in this MSM cohort.
  
  
  CONCLUSIONS
  Low score of HIV/AIDS knowledge awareness, young age, having two and more sexual partners during past 6 months and syphilis were the risk factors for HIV infection in MSM in common bathing pools. It is necessary to strengthen the HIV surveillance and intervention in this population.
authors.affiliation: Tianjin Center for Disease Control and Prevention, Tianjin 300011, China.
authors.forename: Maohe
authors.initials: M
authors.lastname: Yu
authors.affiliation: Tianjin Center for Disease Control and Prevention, Tianjin 300011, China.
authors.forename: Guohong
authors.initials: G
authors.lastname: Jiang
authors.affiliation: National Center for STD/AIDS Control and Prevention, Chinese Center for Disease Control and Prevention Beijing 102206, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Dou
authors.affiliation: United States Center of Disease Control Global AIDS Program, China Office, Beijing 100600, China.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Li
authors.affiliation: Tianjin Center for Disease Control and Prevention, Tianjin 300011, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Tianjin Center for Disease Control and Prevention, Tianjin 300011, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Xu
authors.affiliation: Shenlan Public Health Counsel Service Center, Tianjin 300121, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Yang
authors.affiliation: National Center for STD/AIDS Control and Prevention, Chinese Center for Disease Control and Prevention Beijing 102206, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Xu
mesh_terms: D001494:Baths; D002681:China / Q000453:epidemiology; D015658:HIV Infections / Q000453:epidemiology*; D018451:Homosexuality, Male / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D008297:Male; D011446:Prospective Studies; D012307:Risk Factors; D011795:Surveys and Questionnaires