NCT05155241

A Randomized Controlled Trial Evaluating an Online Intervention in Increasing Seasonal Influenza Vaccination Among Community Dwelling People Aged ≥65 Years

A Randomized Controlled Trial Evaluating an Online Intervention Based on the Trans-Theoretical Model in Increasing Seasonal Influenza Vaccination Among Community Dwelling People Aged ≥65 Years

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 396 (actual)
• Sponsor: Chinese University of Hong Kong · Academic / Other
• Sex: All
• Age: 65 Years
• Healthy volunteers: Not accepted

Summary

A non-blinded two-arm parallel randomized controlled trial will be conducted. Inclusion criteria are: 1) aged ≥65 years, 2) having Hong Kong ID, 3) Chinese speaking, 4) willing to be followed up by telephone, 5) having a smartphone, and 6) have not received SIV for the incoming flu season. Exclusion criteria include: 1) cognitive impairment, blindness or deafness, 2) not able to communicate with others effectively, and 3) with known contradictions of SIV (allergic to previous SIV, diagnosed/suspected egg allergy, with bleeding disorder or on warfarin). A total of 396 participants will be randomly assigned to either the intervention group (n=198) or the control group (n=198). Intervention group will watch an online health promotion video tailored to their current stage of change related to SIV uptake once every two weeks for four times (at week 0, 2, 4, and 6). Participants in the control group will watch a same online video providing general advices related to SIV at week 0, 2, 4, and 6. All participants will be followed up by telephone 3 and 6 months after the baseline survey.

Conditions

• Vaccination Refusal

Interventions

Type	Name	Description
BEHAVIORAL	online health promotion video	Participants will watch an online health promotion video tailored to their current stage of change related to seasonal influenza vaccination uptake once every two weeks for four times (at week 0, 2, 4, and 6)
BEHAVIORAL	Control (same online health promotion video)	Participants will watch a same online video providing general advices related to seasonal influenza vaccination at week 0, 2, 4, and 6

Timeline

• Start date: 2021-12-01
• Primary completion: 2022-07-30
• Completion: 2022-07-30
• First posted: 2021-12-13
• Last updated: 2023-03-07

Locations

1 site across 1 country: Hong Kong