Anonymous linkage between college students and HIV facilities: systematic evaluation of urine self-collection for HIV testing initiative in China
Abstract Background Identifying young HIV-infected individuals who are unaware of their status is a major challenge for HIV control in China. To address this, an innovative, anonymous vending machine-based urine self-collection for HIV testing (USCT) program was implemented in 2016 in colleges across China. Methods From June 2016 to December 2019, 146 vending machines stocked with urine self-collection kits were distributed on 73 college campuses across 11 provinces of China. Urine samples were collected, delivered, and tested in an anonymous manner. We analyzed the returned rate, reactive rate (likelihood of HIV screening positive), testing effectiveness (the annual number of HIV-infected college students screened by USCT or other testing methods), and the spatiotemporal relationship between USCT usage and student activity per college generated from the usage of a social networking application. Results Among the total of 5178 kits sold, 3109 (60%) samples were returned and of these 2933 (94%) were eligible for testing. The HIV-reactive rate was 2.3% (66/2933). The average effectiveness ratio among the 34 participating Beijing colleges was 0.39 (12:31) between USCT and conventional testing methods. A strong spatiotemporal correlation between USCT numbers and online student activity was observed during school semesters in Beijing. Conclusions USCT is a powerful complement to current interventions that target at-risk students and promote HIV testing. The social networking-based evaluation framework can guide us in prioritizing at-risk target populations.