title: High incidence of HIV and syphilis among migrant men who have sex with men in Beijing, China: a prospective cohort study.
abstract: OBJECTIVE
  The purpose of the study was to investigate the incidence of HIV and syphilis and their related factors, as well as to examine the predictors associated with seroconversion among migrant men who have sex with men (MSM) in Beijing, China.
  
  
  METHODS
  Prospective cohort study.
  
  
  METHODS
  Beijing, China.
  
  
  METHODS
  511 HIV-negative migrant MSM.
  
  
  METHODS
  Sociodemographic and behavioural information of participants, HIV and syphilis incidence rates, and factors associated with HIV/syphilis seroconversion and cohort retention.
  
  
  RESULTS
  Of the 511 participants, 60.3% (308) and 52.4% (273) were retained at the 4- and 8-month follow-up visits, respectively. The HIV and syphilis incidence rates were 7.83 (95% CI 4.48 to 12.72) and 11.11 (95% CI 6.47 to 17.80) per 100 person-years, respectively. HIV seroconversion was significantly associated with 'had first anal intercourse at age 15 or younger' (adjusted HR (aHR) 9.20, 95% CI 1.94 to 43.56) and 'ever had group sex' (aHR 4.30, 95% CI 1.40 to 13.18). Bisexual orientation (aHR 5.09, 95% CI 1.02 to 25.57) was significantly associated with syphilis seroconversion. Predictors associated with both 4- and 8-month retention rates included age ≥25 years old and living in Beijing for more than 1 year.
  
  
  CONCLUSIONS
  The high incidence of HIV and syphilis among migrant MSM is a cause for concern. A comprehensive strategy should be implemented to maintain a higher retention rate among migrant MSM.
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China.
authors.forename: Hengyi
authors.initials: H
authors.lastname: Mao
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China.
authors.forename: Wenzhe
authors.initials: W
authors.lastname: Ma
authors.affiliation: Department of STDs/AIDS Prevention and Control, Beijing Center for Disease Prevention and Control, Beijing, China.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Lu
authors.affiliation: National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Wang
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zheng
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China.
authors.forename: Zhihang
authors.initials: Z
authors.lastname: Peng
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China.
authors.forename: Rongbin
authors.initials: R
authors.lastname: Yu
authors.affiliation: National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D002681:China / Q000453:epidemiology; D015331:Cohort Studies; D015658:HIV Infections / Q000453:epidemiology*; D006679:HIV Seropositivity / Q000453:epidemiology; D018451:Homosexuality, Male / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D008297:Male; D011446:Prospective Studies; D013587:Syphilis / Q000453:epidemiology*; D014171:Transients and Migrants / Q000706:statistics & numerical data*; D055815:Young Adult
keywords: SEXUAL MEDICINE