Human immunodeficiency virus (HIV) infection is still a major cause of death in Thais and new cases of infection are still emerging among the key population comprising men who have sex with men (MSM), sex workers and their clients, and transgender women (TGW) and people who inject drugs. The objective of this study was to compare the incidence of HIV infection between MSM and TGW who were tested at stand-alone and mobile HIV voluntary counseling and testing (VCT) centers and to identify factors associated with HIV-positive individuals from the two services. We conducted an observational study using MSM and TGW individuals with unknown HIV status from the databases at a stand-alone center and a mobile VCT belonging to the MPlus in Chiang Mai province, Thailand. Factors associated with HIV-positive status were identified using logistic regression model. HIV VCT data were obtained for 6971 individuals at both MPlus center and mobile care unit. Among 3033 and 3938 clients tested at each facility, respectively, 168 (5.6%) and 101 (2.6%) clients were HIV positive. Individuals tested at the stand-alone centers were at a 1.91-fold higher risk of being HIV positive compared with those tested at the mobile VCT unit. Individuals who were 20-24 or >24 years old, sex workers, or sexually transmitted infection positive were more likely to be HIV positive. Our results show the beneficial effect of mobile HIV VCT facilities that enable testing of more of the at-risk population. Developing mobile VCT activities that attract a particular target population is needed to be able to reach the 90-90-90 goals. This study was approved by the Ethics Committee of the Faculty of Medicine, Chiang Mai University (0BG-2562-06418).
Keywords: HIV; men who have sex with men; mobile voluntary counseling; stand-alone; transgender women.