Health literacy disparities in South Korea: insights from a latent profile analysis

Health literacy has been empirically linked to overall health outcomes. Existing interventions generally employ a variable-centred approach, often neglecting the cumulative impact of various factors and the ways different groups interact with health information. We aimed to explore health literacy in the general population of South Korea by identifying and characterising distinct health literacy profiles using latent profile analysis.

A cross-sectional design was utilised, analysing health literacy data from the second wave of the Korea Health Panel Survey (collected between March and July 2021) with responses from 9,509 adults. Health literacy was assessed in the domains of health management, disease prevention, and health promotion using the 16-item European Health Literacy Survey Questionnaire. Latent profile analysis was used to identify health literacy profiles, and multinomial logistic regression analysis was used to examine sociodemographic and health-related factors associated with profile membership.

Latent profile analysis revealed three distinct health literacy groups: low (27.91%), moderate (63.51%), and high (8.58%). A social gradient was observed, with disparities in age, education, income, and residence observed across the groups. Membership in the low health literacy group was associated with being older, disability, and chronic disease-populations with heightened healthcare needs.

The findings underscore the need for targeted interventions to address the unique challenges faced by populations with low health literacy in a universal health coverage system such as that of South Korea. By identifying those at highest risk for low HLit and targeting policy measures accordingly, healthcare systems can allocate resources more effectively and make health information genuinely accessible for all. In doing so, such strategies can ultimately help mitigate the disparities highlighted in this study. These insights provide a foundation for policies aimed at promoting health equity through focused health literacy initiatives.