[Receiving Human Immunodeficiency Virus Serostatus Disclosure from Male Sexual Partners and Related Factors among Men Who Have Sex with Men Aged 50 and Above].

Objective To investigate the rate and correlates of receiving human immunodeficiency virus(HIV) serostatus disclosure from their most recent male sexual partners among men who have sex with men(MSM) aged 50 and above. Methods With a geosocial networking application,we recruited participants through online convenience sampling to collect the demographic variables,behavioral information,receiving HIV serostatus disclosure,etc.Univariate and multivariate analyses were performed to interpret the associated factors of receiving HIV serostatus disclosure.

HIV incidence among men who have sex with men using geosocial networking smartphone application in Beijing, China: an open cohort study.

Background: Sexual transmission among men who have sex with men (MSM) is the dominant route of HIV transmission in China. Extensive use of geosocial networking (GSN) smartphone application (app) has dramatically changed the pattern of sexual behaviors and HIV risk among MSM, but data on HIV incidence and the changing risk behaviors of GSN app-using MSM are limited. We aims to assess the HIV incidence and its correlates among gay GSN app-using MSM in China.

HIV care-seeking behaviour after HIV self-testing among men who have sex with men in Beijing, China: a cross-sectional study.

Background: Men who have sex with men (MSM) has become the group with the fastest growing HIV epidemic in China. Since many Chinese MSM are conducting HIV self-testing, we aimed to determine the rate of HIV care seeking after self-testing, examine characteristics of "seekers" compared to "non-seekers," and explore factors associated with HIV care-seeking behaviour.

Methods: A cross-sectional study design was used and an online survey was conducted in Beijing, China in 2016, among users of a popular Chinese gay networking smart phone application.

[Loss to follow-up and associated factors in a cohort study among men who have sex with men].

Objective: To explore the associated factors on loss to follow-up among men who have sex with men (MSM) in a prospective cohort study.

Methods: We recruited eligible HIV-negative MSM at baseline in eight cities from June to October 2009. Interviewer-administrated questionnaire and blood testings for HIV, syphilis and human simplex virus type 2, were accomplished upon enrollment, 6-month and 12-month follow-up visits in the program.

[Evaluation on the long-term effectiveness among the first set eight methadone maintenance treatment clinics in China].

Objective: To evaluate the long-term effectiveness of the first set 8 methadone maintenance treatment (MMT) clinics in China.

Methods: Repeated cross-sectional surveys were conducted on the first month after the enrollment and 5 years later, among drug users who received MMT, using a standard questionnaire. Data on demographic characteristics, HIV-related high-risk behaviors, criminal records associated with drug use and related family/social functions were collected and analyzed.

[Evaluation of first 8 pilot methadone maintenance treatment clinics in China].

Objective: To evaluate the effectiveness of the first eight pilot methadone maintenance treatment (MMT) clinics in China.

Methods: A questionnaire survey of the clients at the 8 pilot MMT clinics was performed at entry, 6 month and 12 month follow-up. Drug using behaviors, drug related crime behaviors, and relationships in families were compared among at entry, 6 and 12 months follow-up.