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| Incidence and influencing factors for HIV infection among men who have sex with men in Hangzhou |
| LI Xi-ting，LUO Yan，ZHANG Xing-liang，JIN Jie，XU Ke，LUO Wen-jie，LI Qing-chun
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| Department of HIV/AIDS and STDs Control and Prevention，Hangzhou Center for Disease Control and Prevention，Hangzhou，Zhejiang 310021，China |
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Abstract Objective To study HIV incidence and related factors among men who have sex with men（MSM）in Hangzhou. Methods We conducted a prospective cohort study consisted of 523 HIV-negative MSM in Hangzhou.We collected their sociodemographic and behavior information by questionnaire and blood samples for HIV and syphilis detection at baseline and during follow-up period. HIV seroconversion was defined as the end point to calculate the HIV incidence. We analyzed the influencing factors for HIV infection among MSM by cox regression. Results We observed a total of 374 participants for 12 months，accounting for 71.51%. There were 16 HIV positive cases and the HIV incidence rate was 6.57/100 person-years. Multivariate cox regression analysis showed that less than 30 years old（HR=10.050，95%CI：2.576-39.212），living in Hangzhou for more than 2 years（HR=0.082，95%CI：0.020-0.341）and having unprotected anal intercourse with casual male partners in the past 3 months（HR=0.060，95%CI：0.019-0.188）were associated with HIV incidence. Conclusio HIV incidence among MSM in Hangzhou was relatively high. The MSM who were less than 30 years old，living in Hangzhou for less than 2 years and having unprotected anal intercourse with casual male partners have higher risk of HIV infection.
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Published: 26 September 2018
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