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

Not Applicable

Completed

• Conditions: Vaccination Refusal
• Interventions: Behavioral: online health promotion video; Behavioral: Control (same online health promotion video)

• Registration Number: NCT05155241
• Lead Sponsor: Chinese University of Hong Kong

Brief 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.

Detailed Description

Not available

Study Timeline

• Study Start: 2021-12-01
• Study First Submitted: 2021-12-01
• Study First Submitted QC: 2021-12-10
• Study First Posted: 2021-12-13
• Primary Completion: 2022-07-30
• Study Completion: 2022-07-30
• Status Verified: 2023-03
• Last Update Submitted: 2023-03-05
• Last Update Posted: 2023-03-07

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 396

Inclusion Criteria

• Aged ≥65 years,
• Having Hong Kong ID
• Chinese speaking
• Willing to be followed up by telephone
• Having a smartphone
• Have not received seasonal influenza vaccination for the incoming flu season

Read More

Exclusion Criteria

• Cognitive impairment, blindness or deafness,
• Not able to communicate with others effectively
• With known contradictions of seasonal influenza vaccination listed by the Centre for Health Protection (allergic to previous SIV, diagnosed/suspected egg allergy, with bleeding disorder or on warfarin)

Read More

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Intervention	online health promotion video	Participants 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)
Control	Control (same online health promotion video)	Participants will watch a same online video providing general advices related to SIV at week 0, 2, 4, and 6

Primary Outcome Measures

Name	Time	Method
Seasonal influenza vaccination uptake	6 months	Self-reported uptake of one dose of seasonal influenza vaccination

Trial Locations

Locations (1)

Centre for Health Behaviours Research, the Chinese University of Hong Kong; 🇭🇰 Hong Kong, Hong Kong