Longitudinal Perspectives on Health and Medical Research in Korea: Strengths and Limitations of Key Panel Datasets

Rapid population ageing, the growing burden of chronic diseases, and evolving healthcare demands have heightened the need for robust longitudinal data to support evidence-based health policy and interventions. Longitudinal panel surveys, which repeatedly collect data from the same individuals over extended periods, offer detailed insights into dynamic health-related changes and their determinants. South Korea has established numerous national panel surveys over recent decades; however, systematic comparative assessments across these surveys-particularly concerning their health-related variables and adaptations during the coronavirus disease 2019 (COVID-19) pandemic-are lacking. We systematically reviewed eleven major Korean longitudinal panel surveys, focusing on health-related variables and COVID-19 modules. Key variables included health status, chronic diseases, lifestyle behaviors, healthcare utilization, and mental health measures. COVID-19 adaptations such as infection history, vaccination status, and socioeconomic impacts were also examined using official documentation. The findings revealed considerable variability among the surveys in the range and depth of health variables captured, reflecting distinct target populations and research objectives. Surveys focused on specific demographic groups (older adults, children, women, and people with disabilities) tended to provide more comprehensive coverage of health indicators and incorporated specialized instruments (e.g., CES-D, EQ-5D). Conversely, general population-based panels demonstrated substantial variability. COVID-19-specific adaptations varied significantly: while certain surveys (Korean Labor and Income Panel Study, Korea Health Panel Survey, Korean Longitudinal Survey of Women and Families, Korean Children and Youth Panel Survey) included explicit pandemic-related modules capturing infection histories, vaccinations, and changes in work and family dynamics, others relied on indirect reflections through existing measures. This comprehensive comparative analysis identifies notable strengths and gaps among Korea's major longitudinal panel surveys in health data collection and COVID-19 responsiveness. Enhanced standardization of survey instruments and targeted data harmonization efforts are recommended to optimize these resources for future health policy development, epidemiological research, and effective public health interventions.