NCT07508189

Communication Intervention to Improve Influenza Vaccination Rates Among Elderly in Can Tho

Effectiveness of Community-Based Communication Interventions to Improve Influenza Vaccination Rates Among the Elderly in Vietnam: A Cluster Randomized Controlled Trial

• Status: Active Not Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 1,200 (estimated)
• Sponsor: Can Tho University of Medicine and Pharmacy · Academic / Other
• Sex: All
• Age: 66 Years
• Healthy volunteers: Accepted

Summary

This study evaluates the effectiveness of a community-based communication intervention to increase influenza vaccination rates among the elderly (aged above 65) in Can Tho City, Vietnam. Using a cluster randomized controlled trial design, the intervention includes direct counseling, social media engagement (Zalo), and educational materials targeting the elderly, their relatives, and local health workers. The primary goal is to assess changes in vaccination coverage over a 9-month period.

Detailed description

The study employs a community-based interventional design with a control group. A total of 1,200 elderly participants (600 per group) will be recruited using multi-stage sampling. The intervention group receives a multi-component communication package: * Training for local health workers and collaborators. * Direct community communication sessions using leaflets. * Social media updates and monthly household visits. The control group receives standard health information. Effectiveness is measured by comparing pre- and post-intervention vaccination rates using the Difference-in-Differences (DID) analytical method.

Conditions

• Influenza
• Vaccination Coverage
• Health Communication

Interventions

Type	Name	Description
BEHAVIORAL	Multi-component Health Communication Package	A 12-month intervention program consisting of: 1) Direct health counseling; 2) Weekly educational content shared via Zalo; and 3) Distribution of influenza vaccination leaflets.

Timeline

• Start date: 2015-09-01
• Primary completion: 2026-09-01
• Completion: 2026-12-31
• First posted: 2026-04-02
• Last updated: 2026-04-08

Locations

1 site across 1 country: Vietnam