title: Incidence of HIV-1, syphilis, hepatitis B, and hepatitis C virus infections and predictors associated with retention in a 12-month follow-up study among men who have sex with men in Beijing, China.
abstract: OBJECTIVE
  To investigate the incidence of HIV-1, syphilis, hepatitis B virus (HBV), and hepatitis C virus (HCV) infections and predictors associated with retention in a 12-month follow-up study among men who have sex with men (MSM) in Beijing, China.
  
  
  METHODS
  A total of 507 eligible seronegative MSM were enrolled. Study participants were tested for HIV-1, syphilis, HBV, and HCV and counseled at the baseline, 6-month, and 12-month follow-up visits. The retention rates were analyzed as a function of demographic, behavioral, and recruitment variables.
  
  
  RESULTS
  Of the 507 participants, 86.2% (437) were retained in the cohort at the 12-month follow-up visit. The incidence rates were 2.6 per 100 person-years [95% confidence interval (CI): 1.1% to 4.1%] for HIV-1 infection, 16.9 per 100 person-years for syphilis (95% CI: 12.4% to 21.3%), 3.3 per 100 person-years for HBV (95% CI: 1.5% to 5.1%), and 0.2 per 100 person-years for HCV (95% CI: 0% to 0.7%). Higher education (adjusted odds ratio = 1.94, 95% CI: 1.03 to 3.66) and appearing at the 6-month follow-up visit (adjusted odds ratio = 26.15, 95% CI: 13.44 to 50.89) were significantly associated with 12-month retention.
  
  
  CONCLUSIONS
  HIV, syphilis, and HBV incidence are high among MSM. Intensified intervention is needed urgently. Widespread screening for HIV, syphilis, HBV, and HCV in this group should be considered as measures for control.
authors.affiliation: State Key Laboratory for Infectious Disease Prevention and Control, and National Center for AIDS/sexually transmitted disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), Beijing, P. R. China.
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Ruan
authors.forename: Yujiang
authors.initials: Y
authors.lastname: Jia
authors.forename: Xiaoxi
authors.initials: X
authors.lastname: Zhang
authors.forename: Hongyuan
authors.initials: H
authors.lastname: Liang
authors.forename: Qingchun
authors.initials: Q
authors.lastname: Li
authors.forename: Ye
authors.initials: Y
authors.lastname: Yang
authors.forename: Dongliang
authors.initials: D
authors.lastname: Li
authors.forename: Zhenhai
authors.initials: Z
authors.lastname: Zhou
authors.forename: Fengji
authors.initials: F
authors.lastname: Luo
authors.forename: Wei
authors.initials: W
authors.lastname: Shi
authors.forename: Yiming
authors.initials: Y
authors.lastname: Shao
mesh_terms: D000293:Adolescent; D000328:Adult; D002681:China / Q000453:epidemiology; D005500:Follow-Up Studies; D015658:HIV Infections / Q000453:epidemiology*; D015497:HIV-1; D006509:Hepatitis B / Q000453:epidemiology*; D006526:Hepatitis C / Q000453:epidemiology*; D018451:Homosexuality, Male; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D013587:Syphilis / Q000453:epidemiology*; D014505:Urban Population; D055815:Young Adult