Mobile phone technology may help sustain reductions in HIV/STI transmission risk behaviors among female sex workers (FSWs). We examined the efficacy of a text messaging intervention designed to maintain behavioral improvements in safer sex practices among 602 FSWs in Tijuana and Ciudad Juarez, Mexico. We hypothesized that FSWs who received brief risk reduction counseling and theory-based safer sex maintenance text messages over a 24-month period would have fewer incident HIV/STIs and report greater maintenance of safer sex practices compared to FSWs who received counseling and texts on maintaining general health. Theory-based texts did not change the odds of becoming infected with HIV/STIs in either study site. However, they did lead to significant, sustained protected sex in Tijuana. Theory-based text messaging interventions may help sustain reductions in sexual risk behavior among FSWs.

Trial Registration Clinical Trials.gov. Identifier: NCT02447484

移动电话技术可能有助于持续减少女性性工作者 (FSW) 中的 HIV/STI 传播风险行为。我们在墨西哥蒂华纳和华雷斯城的 602 名 FSW 中检查了旨在保持安全性行为行为改善的短信干预的效果。我们假设在 24 个月内接受简短的风险降低咨询和基于理论的安全性行为维持短信的 FSW 与接受有关维持的咨询和短信的 FSW 相比，发生 HIV/STI 的事件更少，并且报告更安全的性行为维护总体健康。基于理论的文本并没有改变两个研究地点感染 HIV/STI 的几率。然而，它们确实在蒂华纳导致了重要的、持续的受保护性行为。

试验注册Clinical Trials.gov。标识符：NCT02447484