Men who have sex with men (MSM) who use dating applications (apps) have higher rates of engaging in condomless anal sex than those who do not. Therefore, we conducted a two-arm randomized controlled trial to evaluate the effectiveness of an interactive web-based intervention in promoting safer sex among this population. The intervention was guided by the Theory of Planned Behavior and co-designed by researchers, healthcare providers, and MSM participants. The primary outcome was the frequency of condomless anal sex in past three months. Secondary outcomes included five other behavioral outcomes and two psychological outcomes. This trial was registered on ISRCTN (ISRCTN16681863) on 2020/04/28. A total of 480 MSM were enrolled and randomly assigned to the intervention or control group. Our findings indicate that the intervention significantly reduced condomless anal sex behaviors by enhancing self-efficacy and attitudes toward condom use among MSM dating app users, with the effects sustained at both three and six months.

使用约会应用程序 （app） 的男男性行为者 （MSM） 比不使用交友应用程序 （app） 的人进行无套的比率更高。因此，我们进行了一项双臂随机对照试验，以评估基于网络的交互式干预在该人群中促进安全性行为的有效性。该干预以计划行为理论为指导，由研究人员、医疗保健提供者和 MSM 参与者共同设计。主要结局是过去三个月无套的频率。次要结局包括 5 个其他行为结局和 2 个心理结局。该试验于 2020 年 4 月 28 日在 ISRCTN （ISRCTN16681863） 上注册。共有 480 名 MSM 入组并随机分配到干预组或对照组。我们的研究结果表明，该干预通过提高 MSM 约会应用程序用户的自我效能和对使用安全套的态度，显着减少了无套行为，效果在 3 个月和 6 个月时持续。