Analysis of the Change in the Number of Cataract Surgeries: KNHIS Data 2013-2018

Abstract

Purpose: In this study, we examined change in the number of cataract surgeries from 2013 to 2018, since the implementation of institutional changes in 2012, and the introduction of diagnosis-related groups (DRGs) and a gradual reduction in selective-medical expenses from 2014. Methods: Based on data from the main surgery statistical yearbook provided by the Korea National Health Insurance Service (KNHIS), we extracted the number of cataract surgeries nationwide by year from 2013 to 2018. Data were divided by sex, age, regions, and level of healthcare providers in an effort to understand changes that occurred in the number of cataract surgeries and the reasons for these changes. Statistical analysis was carried out using joint point regression. Results: The total number of cataract surgeries per 100,000 people increased by 32.9% over the six-year period, with an annual average increase of 5.9%. Females (58.0-59.2%) had more cataract surgeries than males (40.8-42.0%). Additionally, the number of cataract surgeries per 100,000 people rose over the six-year time frame for those aged under 40 years, and for those in their 40s, 50s, and 60s. In terms of regions and patients' residence, urban areas such as Seoul, Pusan, and Daegu showed an increase in surgeries performed; most provinces, however, with the exception of Jeju Island, indicated a relative decline in cataract surgeries. There was no difference in the number of cataract surgeries performed over the six-year period in terms of the level of healthcare providers. Conclusions: The number of cataract surgeries per 100,000 people rose over the six-year period between 2013 and 2018. By region, an increasing trend was observed in urban areas; however, the level of the healthcare providers did not appear to have an effect on the number of cataract surgeries performed.