Clinical trials

This cluster randomized trial is conducted in Beijing primary schools to evaluate the efficacy of a WeChat mini-program-based high-temperature early warning intervention on the physical and cognitive health of school-age children. Six participating schools are randomly assigned to two parallel groups. The intervention group receives tiered heat alerts and guided self-health monitoring via the mini-program. The control group follows standard daily school and family routines, with no dedicated digital high-temperature early-warning intervention. The primary outcome is children's executive function after a 2.5-month follow-up. A range of secondary indicators related to physical status, mental health and health behaviors are assessed concurrently to quantify the intervention's benefits in mitigating adverse health outcomes caused by high temperatures.

The goal of this clinical trial is to learn if nudge-based interventions and motivational interviewing work to improve influenza vaccination uptake among healthcare workers in China. A two-phase randomized controlled trial will be conducted in community hospitals across China, targeting healthcare workers as participants. The main questions are: Do nudge-based interventions increase vaccination rates among healthcare workers? Does motivational interviewing increase vaccination compliance among those who remain unvaccinated after the phase 1? In phase 1, community hospitals will be randomized as units into three arms: standard nudge group, personalized nudge group, and a control group. In phase 2, healthcare workers who remain unvaccinated after phase 1 will be individually randomized to either a motivational interviewing group or a control group. Participants will: Be recruited from community hospitals to participate in the study. In phase 1 (at the early stage of the flu season), community hospitals will be randomly assigned to one of three groups: standardized nudge messages, personalized nudge messages with a chatbot, or no reminders. If still unvaccinated in phase 2 (during peak flu season), healthcare workers will be individually assigned to either motivational interviewing group or receive no extra contact. Have their vaccination status checked at the end of each phase.