BACKGROUND AND OBJECTIVES: Latino children in immigrant families experience health care disparities. Text messaging interventions for this population may address disparities. The objective of this study was to evaluate the impact of a Spanish-language text messaging intervention on infant emergency department use and well care and vaccine adherence. METHODS: The Salud al Día intervention, an educational video and interactive text messages throughout the child's first year of life, was evaluated via randomized controlled trial conducted in an urban, academic pediatric primary care practice from February 2016 to December 2017. Inclusion criteria were publicly insured singleton infant ,2 months of age; parent age .18, with Spanish as the preferred health care language; and at least 1 household cellular phone. Primary outcomes were abstracted from the electronic medical record at age 15 months. Intention-to-treat analyses were used. RESULTS: A total of 157 parent-child dyads were randomly assigned to Salud al Día (n = 79) or control groups (n = 78). Among all participants, mean parent age was 29.3 years (SD: 6.2 years), mean years in the United States was 7.3 (SD: 5.3 years), and 87% of parents had limited or marginal health literacy. The incidence rate ratio for emergency department use for the control versus intervention group was 1.48 (95% confidence interval: 1.04-2.12). A greater proportion of intervention infants received 2 flu vaccine doses compared with controls (81% vs 67%; P = .04). CONCLUSIONS: This Spanish-language text messaging intervention reduced emergency department use and increased flu vaccine receipt among a population at high risk for health care disparities. Tailored text message interventions are a promising method for addressing disparities. WHAT'S KNOWN ON THIS SUBJECT: Compared with nonimmigrants, immigrant patient populations have benefitted less from advances in health care information technology. A comprehensive approach to addressing health care disparities may require specific focus on implementation and use of digital patient engagement tools among at-risk populations. WHAT THIS STUDY ADDS: A Spanish-language text messaging intervention for parents with limited health literacy and limited English proficiency decreased emergency department use and increased flu vaccination. With this study, we contribute to emerging literature on the utility of these interventions to address health care disparities.

Background: The majority of Latino immigrants have been shown to have a mobile phone. Cellular phones offer a low-cost method of reaching larger populations and have the potential for increased tailoring and interactivity. This supports the development of mHealth interventions to address healthcare disparities in this population. In this study we sought to evaluate the feasibility and acceptability of interactive Spanishlanguage text messages sent throughout a child's first year of life in a low-income, limited-English proficient (LEP) Latino population to support families in accessing and using pediatric primary care more effectively.Methods: Participants (n=79) received interactive text messages over a period of 12 months as a part of a multi-modal mHealth intervention conducted at an urban academic pediatric primary care practice. Inclusion criteria were: singleton infant <2 months of age, enrollment in public health insurance, parent age >18, parent preferred healthcare language of Spanish, and at least one household cellular phone. Interactive text messages were designed to promote increased healthcare engagement and prompted participant responses through preprogramed algorithms. Text message sequences included clinic appointment reminders, support for obtaining medicine and completing referral appointments, monitoring of illness care needs and use, and parent support program reminders. Descriptive analyses were used to examine text message volume, usability, and participant response to text sequences.Results: Among participants, mean parent age was 30.1 years (SD: 6.1 years); mean years in the US was 7.5 years (SD: 5.1 years). 63.3% of parents had less than a high school education and 84.8% of parents had possible/high likelihood of limited health literacy. Participants completed the majority of sequences with appointment reminder sequences having the quickest response time. The top quartile of responders completed 88.3% of sequences; lower educational attainment was associated with lower text message sequence completion. Participants rated the program positively, especially the appointment reminders.Conclusions: LEP Latino parents successfully engaged with interactive Spanish-language text sequences and parent acceptability was high. This study demonstrates feasibility for interventions employing this technology. Text message interventions may be a feasible approach to reduce healthcare disparities and costs for vulnerable populations.