TY  - JOUR
AU  - Wynn, Chelsea S
AU  - Catallozzi, Marina
AU  - Kolff, Chelsea A
AU  - Holleran, Stephen
AU  - Meyer, Dodi
AU  - Ramakrishnan, Rajasekhar
AU  - Stockwell, Melissa S
PY  - 2021
DA  - 2021/12/27
TI  - Personalized Reminders for Immunization Using Short Messaging Systems to Improve Human Papillomavirus Vaccination Series Completion: Parallel-Group Randomized Trial
JO  - JMIR Mhealth Uhealth
SP  - e26356
VL  - 9
IS  - 12
KW  - text messaging
KW  - mobile reminders
KW  - human papillomavirus
KW  - adolescent
KW  - text reminders
KW  - vaccine completion
KW  - vaccine decision-making
KW  - vaccine education
KW  - transtheoretical model
KW  - mobile phone
KW  - smartphone
KW  - mHealth
KW  - mobile health
KW  - minority health
AB  - Background: Completion rates among adolescents who initiate the human papillomavirus (HPV) vaccine 3-dose series are low. SMS text message vaccine reminders are effective, but less is known about the best types for HPV series completion or the ability to assess and target vaccine decision-making stage. Objective: The aim of this study is to compare the effectiveness of HPV vaccine series completion in minority adolescents who received precision and educational versus conventional SMS text message reminders. Methods: Enrolled parents of adolescents aged 9-17 years who received the first HPV vaccine dose at 1 of the 4 academic-affiliated community health clinics in New York City were randomized 1:1 to 1 of the 2 parallel, unblinded arms: precision SMS text messages (which included stage-targeted educational information, next dose due date, and site-specific walk-in hours) or conventional SMS text messages without educational information. Randomization was stratified according to gender, age, and language. The primary outcome was series completion within 12 months. In post hoc analysis, enrollees were compared with concurrent nonenrollees and historical controls. Results: Overall, 956 parents were enrolled in the study. The precision (475 families) and conventional (481 families) SMS text message arms had similarly high series completion rates (344/475, 72.4% vs 364/481, 75.7%). A total of 42 days after the first dose, two-thirds of families, not initially in the preparation stage, moved to preparation or vaccinated stage. Those in either SMS text message arm had significantly higher completion rates than nonenrollees (708/1503, 47.1% vs 679/1503, 45.17%; P<.001). Even after removing those needing only 2 HPV doses, adolescents receiving any SMS text messages had higher completion rates than historical controls (337/2823, 11.93% vs 981/2823, 34.75%; P<.001). A population-wide effect was seen from 2014 to 2016, above historical trends. Conclusions: SMS text message reminders led to timely HPV vaccine series completion in a low-income, urban, minority study population and also led to population-wide effects. Educational information did not provide an added benefit to this population. Trial Registration: ClinicalTrials.gov NCT02236273; https://clinicaltrials.gov/ct2/show/NCT02236273 
SN  - 2291-5222
UR  - https://mhealth.jmir.org/2021/12/e26356
UR  - https://doi.org/10.2196/26356
UR  - http://www.ncbi.nlm.nih.gov/pubmed/34958306
DO  - 10.2196/26356
ID  - info:doi/10.2196/26356
ER  -