Health Literacy Interventions to Improve Health Outcomes in Low- and Middle-Income Countries.

backgroundHealth care systems in many low- and middle-income countries (LMICs) face considerable challenges in providing high-quality, affordable, and universally accessible care. Feasible solutions to these issues require health literacy (HL) interventions for people who live in LMICs. Low HL is a significant problem in many LMICs because of the low levels of general literacy and poorly resourced and functioning health systems. A comprehensive understanding of HL interventions is essential to determine whether these interventions meet the health information needs of people who live in LMICs and to develop other effective HL interventions specifically for people who live in LMICs, improve health outcomes, and reduce inequalities.

methodsA medical research librarian developed and implemented search strategies to identify relevant evidence. Included studies needed to contain HL in LMICs component to understand or evaluate HL interventions that target people who live in LMICs. Two reviewers selected studies, conducted quality assessments, and extracted data by using standard forms. Discussion or third-party adjudication resolved disagreements. The collected data include the design of the study, type of HL intervention, target audience, theoretical influences, approaches to evaluating the intervention delivered, intervention received, intervention fidelity, intervention reach, data analysis, and study outcomes. KEY

resultsThe reviewers systematically analyzed the data from 23 published research studies, including 20 quantitative, 1 qualitative, and 2 mixed-method studies, on HL interventions to improve the health outcomes in LMICs. The various HL interventions for different groups of the population depend on the health outcomes of the study. The reviewers identified four themes: traditional HL interventions, art-based HL interventions, interactive learning strategies, and technology-based HL interventions. The researchers of a few studies also used multicomponent interventions to improve the HL of the population. DISCUSSION: Despite global improvements in health indicators over time, such as decreased mortality and morbidity, significant challenges remain regarding the quality of the delivery of health care in many LMICs. All of the HL interventions were effective and significantly improved the knowledge and awareness of the population. However, based on the literature review, the reviewers found significant evidence that only a limited number of HL interventions are delivered through innovative and technological learning strategies. In addition, the sustainability and scalability of these interventions is not clear. Therefore, future research on sustainability measures for effective HL interventions in LMICs is still needed. [HLRP: Health Literacy Research and Practice. 2020;4(4):e250-e266.].