Effectiveness of rapid verbal persuasion in promoting herpes zoster vaccination among older adults in China: study protocol of a two-arm randomised controlled trial.

Abstract

Herpes zoster (HZ) vaccinations effectively prevent HZ and may decrease dementia, but HZ vaccine uptake remains poor in China. Rapid verbal persuasion is an innovative intervention, in which physicians offered brief advice to encourage individuals to accept vaccination. This study aims to tailor this intervention to promote HZ vaccination among older adults. The proposed study will be a two-arm randomised controlled trial and conducted across four community health centres in Shenzhen, China. A total of 388 participants aged 50 and above will be recruited and assigned to either the intervention arm or the standard-care arm. The primary outcome will be first-dose uptake, recorded within 3 weeks after intervention. The primary outcome will be calculated for each arm and compared using χ² test. This trial has been approved by the Ethics Committee of Southern Medical University (Ethical Approval (2024) No. 90). Our findings will be disseminated to patients, healthcare providers and stakeholders through outreach activities and published in peer-reviewed journals, as well as presented in scientific conferences to inform future research or evidence-based practices for public health promotion. Chinese Clinical Trial Registry (No. ChiCTR2500100798). Registered on 15 April 2025.