This randomized controlled trial will compare the efficacy of a Chatbot-delivered stage-of-change-tailored online intervention versus a Chatbot-delivered non-stage-of-change-tailored online intervention for mothers in increasing seasonal influenza vaccination uptake of their children aged 3-6 years. Mothers of children aged 3-6 years will be randomized evenly into either the intervention or the control group.
In the intervention group, the Chatbot will assess mothers' stage of change regarding their children's seasonal influenza vaccination uptake and deliver SOC-tailored interventions through WhatsApp every two weeks for four times.
In the control group, the Chatbot will provide a standard and non-stage-of-change-tailored intervention every two weeks for four times.
All participants will complete three telephone surveys at baseline (T0), after completion of the intervention (T1) and three months after T1 (T2).
Mothers aged ≥18 years with at least one child aged 3-6 years studying in kindergarten in Hong Kong
Cantonese speaking
Having smartphone with internet access
Already having WhatsApp on the smartphone
Blindness or deafness
The index child has known medical contraindications for seasonal influenza vaccination
Parallel
Stage-of-change-tailored intervention
BehavioralThe Chatbot will deliver four intervention sessions tailored to participants' current stage of change regarding their index child's seasonal influenza vaccination uptake at Week 0, 2, 4, and 6. Participants will also have access to real-time Question-and-Answer (QA) function provided by the chatbot to address their questions related to seasonal influenza vaccination during the intervention period (week 0-6), and they are free to spend as much time as they want on such function.
Non-stage-of-change-tailored intervention
BehavioralThe Chatbot will automatically send participants a link to access a standard online video at week 0, 2, 4 and 6. Participants will also have access to real-time Question-and-Answer (QA) function provided by the chatbot to address their questions related to seasonal influenza vaccination during the intervention period (week 0-6), and they are free to spend as much time as they want on such function.
Index child's seasonal influenza vaccination uptake reported by his/her mother with validation
The research team will ask the participants whether their index children have taken up seasonal influenza vaccination at T2 (3 months after completion of the interventions) using a validated question through telephone interview. The research team will validate the outcome by requesting participants uploading an image of SIV receipt, while hiding personal identification, via the WhatsApp account used in this project.
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This trial is not recruiting at the moment. You can still explore other options:
