None listed
Conditions
Brief summary
We aim to conduct randomised multi-arm Bayesian adaptive trial of SMS reminders to determine whether personalised provider-initiated SMS reminders are effective for improving the timeliness of routine vaccination among Australian children. Parents will be enrolled across multiple SmartVax GP clinics and community-based providers in Western Australia.
Interventions
One of 12 active arms covering two domains: (i) SMS content (neutral, positive, negative or social norms) and (ii) timing (-14, 0 or +7 days relative to the vaccination due date);
Neutral messages consist of :“[CLINIC NAME]: [Child’s name] is due for a X-month vaccination on XX/XX/XX. To book or opt-out of SMS, call XXXX XXXX. Replies are not monitored, pls ignore SMS if you have an appt”
Positive messages consist of :“[CLINIC NAME]: [Child’s name] is due for a vaccination on XX/XX/XX. Vaccina
One of 12 active arms covering two domains: (i) SMS content (neutral, positive, negative or social norms) and (ii) timing (-14, 0 or +7 days relative to the vaccination due date); Neutral messages consist of :“[CLINIC NAME]: [Child’s name] is due for a X-month vaccination on XX/XX/XX. To book or opt-out of SMS, call XXXX XXXX. Replies are not monitored, pls ignore SMS if you have an appt” Positive messages consist of :“[CLINIC NAME]: [Child’s name] is due for a vaccination on XX/XX/XX. Vaccinating on time gives [Child’s name] the best defence against infectious diseases. To book or opt-out of SMS, call XXXX XXXX. Replies are not monitored, pls ignore SMS if you have an appt” Negative messages consist of :“[CLINIC NAME]: [Child’s name] is due for a vaccination on XX/XX/XX. Delaying a child’s vaccination can put them and other children at risk. To book or opt-out of SMS, call XXXX XXXX. Replies are not monitored, pls ignore SMS if you have an appt” Social norm messages consist of :“[CLINIC NAME]: [Child’s name] is due for a vaccination on XX/XX/XX. Vaccinating on time protects [Child’s name] and other children who are too young to be vaccinated. To book or opt-out of SMS, call XXXX XXXX. Replies are not monitored, pls ignore SMS if you have an appt” Neutral SMS sent 14 days before the due-date OR Positive SMS sent 14 days before the due-date OR Negative SMS sent 14 days before the due-date OR Social Norms SMS sent 14 days before the due-date OR Neutral SMS sent on the due-date OR Positive SMS sent on the due-date OR Negative SMS sent on the due-date OR Social Norms SMS sent on the due-date OR Neutral SMS sent 7 days after the due-date OR Positive SMS sent 7 days after the due-date OR Negative SMS sent 7 days after the due-date OR Social Norms SMS sent 7 days after the due-date
Sponsors
Telethon Kids Institute
Study design
Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Educational / counselling / training
Masking
Open (masking not used)
Eligibility
Sex/Gender
All
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
Parents (18 years and older) of children aged 6 weeks – 4 years who are registered with a SmartVax registered GP clinic or community vaccination clinic Parents must have a mobile phone number registered with the vaccine provider The child must be due for an upcoming vaccine during the trial period The child at the clinic previously, excluding 6 week old children their first vaccine dose Eligible children must have their most recent details entered into their electronic medicalhealth record, including the parent mobile phone number and the child’s date of birth and name.
Exclusion criteria
The parent(s) of the child have previously requested not to be contacted by the clinic via SMS Parents who in the opinion of clinic staff would be unsuitable for inclusion in the study, for example because they are known to attend for routine vaccinations elsewhere, they have relocated outside of the clinic catchment area, the registered mobile phone number is known to be obsolete or wrong, or because they are registered as conscientious objectors to vaccination The critical information required to produce a unique identification number has not been entered properly into the practice’s electronic medical record (i.e. parent mobile phone number, child’s date of birth, child’s first and surname) Children known or suspected to be Ttwins and triplets will be excluded; producing a unique identification number will not be possible for siblings with the same birthdate
Outcome results
None listed