Adaptive engagement within a prospective registry: tracking health, occupation, and social dynamics among female sex workers in Southern Sichuan

This study is the first to implement a prospective registry for FSWs in Southwest China and uniquely embeds an evaluation of engagement models. By comparing standard and adaptive follow-up approaches, the study examines whether personalized contact improves registry performance and participant support. Findings will generate critical longitudinal insights and guide future research, interventions, and policies tailored to vulnerable populations, while addressing the contextual challenges of implementation in China.