A RCT Evaluating an Online Intervention in Increasing Pneumococcal Vaccination Among Older Adults

Not Applicable

Recruiting

• Conditions: Vaccination Refusal
• Interventions: Behavioral: Chatbot-delivered interventions tailored to stage of changes; Behavioral: Chatbot-delivered standard interventions

• Registration Number: NCT05772117
• Lead Sponsor: Chinese University of Hong Kong

Brief Summary

To evaluate the relative efficacy of an online intervention based on the Trans-theoretical Model delivered by a fully-automated Chatbot with natural language processing functions versus a control in promoting pneumococcal vaccination uptake among Hong Kong people aged ≥65 years. A total of 374 participants will be randomized evenly to either the intervention group or the control group. Participants in the intervention group will receive Chatbot-delivered interventions tailored to their stage of change regarding PV uptake in a conversational way at Month 0, 1, 2, and 3. Participants in the control group will receive Chatbot-delivered general information related to PV at Month 0, 1, 2, and 3. All participants will be followed up 6 and 12 months after completion of the intervention.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2023-03-06
• Study First Submitted QC: 2023-03-06
• Study Start: 2023-03-13
• Study First Posted: 2023-03-16
• Status Verified: 2023-04
• Last Update Submitted: 2023-04-04
• Last Update Posted: 2023-04-06
• Primary Completion: 2024-08-31
• Study Completion: 2024-08-31

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 374

Inclusion Criteria

• aged ≥65 years
• having Hong Kong ID
• Chinese speaking
• have not received any penumococcal vaccination
• willing to be followed up by telephone
• having a smartphone
• able to send and read text/voice messages via smartphone.

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Exclusion Criteria

• blindness or deafness
• not able to communicate with others effectively
• with known contradictions of pneumococcal vaccination
• having been diagnosed with major psychiatric illness
• scored ≤16 in the validated telephone version of the Cantonese Mini-mental State Examination (T-CMMSE).

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Intervention	Chatbot-delivered interventions tailored to stage of changes	Participants receive Chatbot-delivered interventions tailored to their stage of change regarding PV uptake in a conversational way at Month 0, 1, 2, and 3.
Control	Chatbot-delivered standard interventions	Participants receive Chatbot-delivered general information related to PV at Month 0, 1, 2, and 3.

Primary Outcome Measures

Name	Time	Method
Pneumococcal vaccination uptake	12 months	Self-reported uptake of pneumococcal vaccination within the 12-month follow-up period

Trial Locations

Locations (1)

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