Principal Findings
HIV testing, MSM, HIV testing uptake
Despite significant achievements in HIV prevention worldwide, HIV testing uptake among MSM is still suboptimal in China. It is crucial to develop effective interventions to improve HIV testing uptake among MSM. In this cluster randomized controlled trial among Chinese MSM, the digital, crowdsourced, multilevel intervention was able to effectively enlarge HIV testing coverage, with an 11.62% increase in the proportion of HIV testing in the intervention arm. Our study extends previous research on HIV prevention interventions by using crowdsourced methods to develop tailored interventions, focusing on digital methods for intervention promotion and dissemination and addressing both individual- and community-level factors related to HIV testing.Our findings are consistent with a previous cluster randomized controlled trial among MSM in China, which found that a crowdsourced intervention increased the number of individuals receiving an HIV test by 8.9% [Most previous HIV prevention programs implemented interventions addressing factors related to HIV testing at a single level [We also found that providing HIV self-testing services through digital tools effectively improved the probability of individuals receiving an HIV test. HIV self-testing services are an effective and cost-saving tool for promoting HIV testing among MSM [