Potential role of regular physicians in improving health literacy in patients with chronic diseases: a retrospective cross-sectional study in Korea.

Background: The availability of health information through media has raised public awareness of health literacy (HL). HL is essential for medication adherence and self-management in individuals with chronic diseases, and for those without chronic conditions, HL is important for promoting health and engaging in preventive behaviors. This study examined the role of having a regular physician in improving HL among Korean adults, both with and without chronic diseases. Methods: We conducted a retrospective, cross-sectional analysis using data from 8,322 participants in the 2021 Korea Health Panel Study. HL was measured with the 16-item European Health Literacy Survey Questionnaire. To identify factors associated with HL categories and to calculate adjusted mean HL scores, we used multiple logistic regression and weighted linear regression. Results: Among participants with chronic diseases (n=4,627), 56.6% reported having a regular physician, with the largest group (42.7%) showing inadequate HL. After adjustment, age 75 years or older and lower education were significantly linked to lower HL levels, regardless of chronic disease status. Having a regular physician was significantly associated with higher HL levels in participants with chronic diseases (adjusted odds ratio, 1.94; 95% confidence interval, 1.42-2.63), but not in those without chronic diseases. Participants with chronic diseases who had a regular physician showed higher mean HL scores across all HL competencies and domains. Conclusion: Although access to health information has increased, the risk of encountering conflicting or misleading content has grown. These findings emphasize the importance of regular physicians in guiding patients and improving HL, especially among individuals with chronic diseases.