Text Message Reminder-Recalls For Early Childhood Vaccination

Study Overview
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Brief Summary
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Although the investigators have reached the Healthy People 2010 goal of 80% coverage among U.S. children 19-35 months of age for the primary immunization series, 20% of children still remain underimmunized. In addition, pockets of low immunization coverage and outbreaks of vaccine preventable disease persist. Immunization reminder-recalls have been shown to be successful, but have been limited by the ability to identify and reach large target populations in a real-time, automated fashion. Reminder-recalls via text message may offer an innovative opportunity to improve vaccination coverage. Currently, 91% of Americans own a cell phone. Prior research by our team suggests that text messages reminder recalls may be an effective tool to remind parents about their children's vaccines. In this study, the investigators will demonstrate the effectiveness of tailored text message appointment and immunization reminders linked to a well-established and functional immunization registry to increase coverage rates and timeliness of the sentinel vaccines of MMR and HepA. The investigators will target parents of young children from an underserved population that is primarily Latino, with low socioeconomic status.

Official Title
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Text 4 Health-Kids: Text Message Reminder-Recalls For Early Childhood Vaccination

Conditions
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Vaccination

Intervention / Treatment
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* Other: Text message


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Parents of child >9 months to 25 months Child with at least one visit to one of the participating clinical sites in the previous 12 months Parental cell phone number recorded in the registration system

Ages Eligible for Study
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Minimum Age: 9 Months
Maximum Age: 50 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Health Services Research
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Text message reminders<br> | Other: Text message<br>* text message appointment and immunization reminders<br>|
| Active Comparator: standard of care for MMR, letter reminder for Hep A<br>MMR: automated phone call appointment reminder Hep A: recall letter, automated phone call appointment reminder | Other: Text message<br>* text message appointment and immunization reminders<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Receipt of MMR1 |  | by 13 and 16 months of age | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Timeliness of HepA vaccination post-recall |  | 4,12, 24 weeks | 
| Attendance at appointments |  | after appointment | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Underimmunization, text message, vaccination, Underimmunization