This review examines the challenges associated with occupational disease surveillance in Korea, particularly emphasizing the limitations of current data sources such as the Industrial Accident Compensation Insurance (IACI) statistics and special health examinations. The IACI system undercounts cases due to its emphasis on severe diseases and restrictions on approvals. Special health examinations, although they cover a broad workforce, are constrained by their annual scheduling, which leads to missed acute illnesses and subclinical conditions. The paper also explores the history of occupational disease surveillance in Korea, highlighting the fragmented and disease-specific approach of earlier systems. The authors introduce the newly established Korea Occupational Disease Surveillance Center (KODSC), a comprehensive nationwide system designed to gather, analyze, and interpret data on occupational diseases through a network of regional centers. By incorporating hospital-based surveillance and focusing on acute poisonings and other sentinel events, the KODSC aims to overcome the limitations of previous systems and promote collaboration with various agencies. Although it is still in the early stages of implementation, the KODSC demonstrates potential for improving data accuracy and contributing valuable insights for public health policy.

This review examines the challenges associated with occupational disease surveillance in Korea, particularly emphasizing the limitations of current data sources such as the Industrial Accident Compensation Insurance (IACI) statistics and special health examinations. The IACI system undercounts cases due to its emphasis on severe diseases and restrictions on approvals. Special health examinations, although they cover a broad workforce, are constrained by their annual scheduling, which leads to missed acute illnesses and subclinical conditions. The paper also explores the history of occupational disease surveillance in Korea, highlighting the fragmented and disease-specific approach of earlier systems. The authors introduce the newly established Korea Occupational Disease Surveillance Center (KODSC), a comprehensive nationwide system designed to gather, analyze, and interpret data on occupational diseases through a network of regional centers. By incorporating hospital-based surveillance and focusing on acute poisonings and other sentinel events, the KODSC aims to overcome the limitations of previous systems and promote collaboration with various agencies. Although it is still in the early stages of implementation, the KODSC demonstrates potential for improving data accuracy and contributing valuable insights for public health policy.

This review examines the challenges associated with occupational disease surveillance in Korea, particularly emphasizing the limitations of current data sources such as the Industrial Accident Compensation Insurance (IACI) statistics and special health examinations. The IACI system undercounts cases due to its emphasis on severe diseases and restrictions on approvals. Special health examinations, although they cover a broad workforce, are constrained by their annual scheduling, which leads to missed acute illnesses and subclinical conditions. The paper also explores the history of occupational disease surveillance in Korea, highlighting the fragmented and disease-specific approach of earlier systems. The authors introduce the newly established Korea Occupational Disease Surveillance Center (KODSC), a comprehensive nationwide system designed to gather, analyze, and interpret data on occupational diseases through a network of regional centers. By incorporating hospital-based surveillance and focusing on acute poisonings and other sentinel events, the KODSC aims to overcome the limitations of previous systems and promote collaboration with various agencies. Although it is still in the early stages of implementation, the KODSC demonstrates potential for improving data accuracy and contributing valuable insights for public health policy.

This review examines the challenges associated with occupational disease surveillance in Korea, particularly emphasizing the limitations of current data sources such as the Industrial Accident Compensation Insurance (IACI) statistics and special health examinations. The IACI system undercounts cases due to its emphasis on severe diseases and restrictions on approvals. Special health examinations, although they cover a broad workforce, are constrained by their annual scheduling, which leads to missed acute illnesses and subclinical conditions. The paper also explores the history of occupational disease surveillance in Korea, highlighting the fragmented and disease-specific approach of earlier systems. The authors introduce the newly established Korea Occupational Disease Surveillance Center (KODSC), a comprehensive nationwide system designed to gather, analyze, and interpret data on occupational diseases through a network of regional centers. By incorporating hospital-based surveillance and focusing on acute poisonings and other sentinel events, the KODSC aims to overcome the limitations of previous systems and promote collaboration with various agencies. Although it is still in the early stages of implementation, the KODSC demonstrates potential for improving data accuracy and contributing valuable insights for public health policy.

This review examines the challenges associated with occupational disease surveillance in Korea, particularly emphasizing the limitations of current data sources such as the Industrial Accident Compensation Insurance (IACI) statistics and special health examinations. The IACI system undercounts cases due to its emphasis on severe diseases and restrictions on approvals. Special health examinations, although they cover a broad workforce, are constrained by their annual scheduling, which leads to missed acute illnesses and subclinical conditions. The paper also explores the history of occupational disease surveillance in Korea, highlighting the fragmented and disease-specific approach of earlier systems. The authors introduce the newly established Korea Occupational Disease Surveillance Center (KODSC), a comprehensive nationwide system designed to gather, analyze, and interpret data on occupational diseases through a network of regional centers. By incorporating hospital-based surveillance and focusing on acute poisonings and other sentinel events, the KODSC aims to overcome the limitations of previous systems and promote collaboration with various agencies. Although it is still in the early stages of implementation, the KODSC demonstrates potential for improving data accuracy and contributing valuable insights for public health policy.

Work disability evaluation plays a central role in medical certification in sickness benefit schemes. This guides effective decision making for return-to-work timelines. Countries that incorporate it have varied approaches. To improve fairness and consistency, Sweden adopted disease-specific guidelines, particularly for complex health conditions such as mental disorders, cancer, and neurological diseases, whereas in the United Kingdom, a fit note system highlights the ease of fitness-for-work assessments in clinical settings. For a successful implementation of the sickness benefit scheme in Korea, it is essential to review international acumen in work disability evaluation and medical certification. This study also examines challenges that physicians face in certification, factors influencing assessments, and the usefulness of disease-specific guidelines. In many countries, administrative burdens, uncertainty in diagnosis, and ethical conflicts complicate physicians' tasks. Countries such as Sweden, France, and Ireland, have addressed these issues by developing structured certification tools and support systems. Learnings from the recent Korean pilot programs, this review identifies the following core priorities: developing disease-specific guidelines, providing clinical support for physicians’ decisions, and integrating occupational health expertise. These guidelines should function not only as administrative checklists, but also as potential clinical tools that consider both patient functionality and job characteristics. Finally, this study offers policy and practical insights to help design a consistent and fair medical certification system for Korea’s sickness benefit program that encourages timely medical intervention, prevents presenteeism, and promotes sustainable workforce reintegration.

This study explores the theoretical foundations and practical applications of medical certification within the sickness benefit systems, particularly in the context of Korea’s pilot program and its planned national rollout. While sickness benefit systems have long existed in many Organization for Economic Cooperation and Development (OECD) countries, Korea has only recently initiated pilot projects, largely prompted by the coronavirus disease 2019 pandemic. These systems aim to compensate for income loss due to illness or injury, and medical certification plays a central role in determining eligibility and work ability. This study defines medical certification as a two-stage process: clinical diagnosis and formal assessment of a worker’s ability to return-to-work. The dual nature highlights the distinct objectives of the medical treatment and social security policies. Drawing on international practices, this study reviews the International Classification of Functioning, Disability, and Health (ICF) as a key global framework for assessing disability and work ability, although it acknowledges the limitations of its application to sickness benefits. The research emphasizes a shift in global trends toward return-to-work–oriented certification models, such as the UK’s “fit note” system, which focuses on evaluating fitness-for-work rather than merely documenting illness. Sweden and Japan also offer models that integrate rehabilitation with flexible work accommodations. Three key issues were identified in Korea’s system: the role of medical certification and concerns about moral hazard, the burden of proof and workload on physicians, and public perceptions of the program’s purpose. We believe that medical certification should not only verify illness but also support early intervention and a healthy workforce. Ultimately, this study advocates for a balanced and efficient medical certification system tailored to Korea’s healthcare context closely aligning with labor market policies to ensure long-term sustenance and integration of the sickness benefit program.

Human nutrient intake is closely related to the conditions of their workplace.

Long working hours are associated with an increased risk of cardiovascular disease, yet the underlying mechanism(s) remain unclear. The study examines how occupational factors like working hours, shift work, and employment status correlate with dietary choices and sodium intake, impacting hypertension risk.

Human nutrient intake is closely related to the conditions of their workplace.