Factors Influencing Health Literacy among South Korean Adults: A Nationwide Study

Abstract Background Health literacy is crucial for health knowledge, behaviors, and outcomes, but research on health literacy has been limited to specific populations and settings in South Korea. This study aimed to identify factors influencing health literacy in a nationally representative sample of South Korean adults to inform public policies. Methods This cross-sectional study utilized data from the 2020 Korea Health Panel survey (10,262 adults aged 18-84 years). Sociodemographic factors (age, gender, education level, monthly household income, employment status, marital status, household characteristics, and region) and health (subjective health status, presence of chronic diseases, depression, and health insurance status) factors were examined. Health literacy was assessed using the 16-item European Health Literacy Survey Questionnaire (HLS-EU-Q16). Linear regression analysis was performed to identify factors associated with health literacy. Results The mean health literacy score was 9.1 (SD 1.60), with significant differences across age groups (p < 0.001). Linear regression analysis (adjusted R2=0.287, F = 322.83, P < 0.001) revealed that higher age, female gender, lower education, lower household income, being single, living outside a metropolitan area, having chronic diseases, lower subjective health, depression, and being uninsured or receiving medical aid were significantly associated with lower health literacy (all p < 0.001). Conclusions This study identified several socio-economic and health-related factors significantly associated with health literacy among South Korean adults. The findings suggest that older individuals, who may require more time to understand and use health information, are particularly vulnerable to low health literacy. These results provide valuable insights for developing targeted interventions and public health policies aimed at promoting health literacy and successful aging in the context of a rapidly aging society. Key messages • Various socio-economic and health-related factors significantly influence health literacy among South Korean adults. • Older individuals are particularly vulnerable to low health literacy, which has implications for successful aging in a rapidly aging society.