[Study on the prevalence of HIV infection and related risk behaviors among male new-type drug users in Qingdao, Shandong province].

To understand the characteristics of new-type drug consumption, sexual behaviors and the prevalence of HIV infection among male new-type drug users in Qingdao, Shandong province. A cross sectional survey was conducted from 2015 to 2016. Participants were recruited from MSM community-based organizations (CBO) and general community through snowball method, relying on volunteers and male peer educators who were on new-type drugs themselves. Face-to-face interview was carried to collect information on drug use and sexual behaviors. Blood samples were collected to test HIV, syphilis and HCV antibodies. Urine samples were collected to test the evidence of new-type drugs. Qualitative variables and quantitative variables were analyzed using Chi-square test/Fisher's exact test and Student's -test respectively. Multivariate logistic regression was used to analyze related factors of binary variables. A total of 1 034 newtype drug users were recruited, including 431 (41.7) MSM population and 603 (58.3) who were not MSM. Compared with the the group of people who were not MSM, people in the the MSM group were younger, unmarried and with higher level of education. The proportion of methamphetamine users were 49.7 (214/431) and 100.0 (603/603) among the groups of MSM or not MSM, respectively. People in the MSM group, 66.8 (288/431) used 5-Methoxy-N, N-diisopropyltryptamine (5-MeODIPT, "foxy" ) in the last six months. However, none from the not-MSM group ever used 5-MeO-DIPT. In the last six months, proportions of sharing new-type drugs with more than two people in the MSM or not groups were 87.9 (379/431) and 97.7 (588/602), respectively ((2)=39.84, <0.01). Proportions of unprotected sexual behavior among the MSM or not groups were 47.5 (285/600) and 7.4 (32/430) respectively ((2)=190.10, <0.01). The proportions of 'group sex' after using drugs among the two groups were 78.1 (335/429) and 5.5 (33/600) respectively ((2)=573.73, <0.01). The prevalence rates of HIV, syphilis and HCV antibody positive among the MSM or not groups were 2.1 and 0.2, 3.3 and 6.3, 0.0 and 0.3, respectively. The prevalence of sharing new-type drugs with more than two people was high among male new-type drug users in Qingdao city. Male new-type-drug-users who were MSM, presented both high prevalence of group sex and HIV infection, and with less condom use. Intervention measures towards this sub-population should be strengthened.