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    Randomized controlled trial of text message reminders for increasing influenza vaccination

    Access Status
    Open access via publisher
    Authors
    Regan, Annette
    Bloomfield, L.
    Peters, I.
    Effler, P.
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Regan, A. and Bloomfield, L. and Peters, I. and Effler, P. 2017. Randomized controlled trial of text message reminders for increasing influenza vaccination. Annals of Family Medicine. 15 (6): pp. 507-514.
    Source Title
    Annals of Family Medicine
    DOI
    10.1370/afm.2120
    ISSN
    1544-1709
    School
    School of Public Health
    URI
    http://hdl.handle.net/20.500.11937/61861
    Collection
    • Curtin Research Publications
    Abstract

    © 2017, Annals of Family Medicine, Inc. All rights reserved. PURPOSE Seasonal influenza vaccine is recommended and funded for groups at higher risk of serious infection, but uptake is suboptimal. We conducted a randomized controlled trial of short message service (SMS) reminders for influenza vaccination. METHODS Six weeks after seasonal influenza vaccinations began, we identified high-risk patients who had a mobile telephone number on record at 10 practices in Western Australia. Thirty-two percent of the selected patients had already been vaccinated in the current year and were ineligible. Of the remaining 12,354 eligible patients at each practice one-half were randomly assigned to receive a vaccination reminder by SMS (intervention) and the rest received no SMS (con-trol). Approximately 3 months after the SMS was sent (the study period), vaccination data were extracted from the patients’ electronic medical records. Log-bino-mial regression models were used to calculate the relative risk (RR) of vaccination between the intervention and control group. RESULTS Twelve-percent (769 of 6,177) of the intervention group and 9% (548 of 6,177) of the control group were vaccinated during the study period, a 39% relative increase attributable to the SMS (RR = 1.39; 95% CI, 1.26-1.54). For every 29 SMSs sent, costing $3.48, 1 additional high-risk patient was immunized. The greatest effect was observed for children younger than 5 years, whose parents were more than twice as likely to have their child vaccinated if they received a SMS reminder (RR = 2.43; 95% CI, 1.79-3.29). CONCLUSION We found S MS reminders to be a modestly effective, low-cost means to increase seasonal influenza vaccine coverage among high-risk patients.

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