Nationwide Incidence of Infantile Cataract Surgery and Risk of Secondary Glaucoma in a Population-based Birth Cohort

PURPOSE: To determine the nationwide birth cohort incidence of infantile cataract (IC) surgery and the risk of secondary glaucoma in a Korean population. DESIGN: A population-based, retrospective cohort study. METHODS: We accessed the Korean National Health Claims database to identify patients with IC who were diagnosed before 1 year of age and who underwent IC surgery among all Koreans born between 2008 and 2018 (n = 9,593,003). We estimated IC surgery incidence in a birth cohort. The incidence rates of post-IC surgery glaucoma were estimated per 100 person-years, based on the Poisson distribution. The risk factors for post-IC surgery glaucoma, including ophthalmic and systemic comorbidities, were analyzed by multivariable logistic regression analysis. RESULTS: During the 11-year study period, 692 patients underwent IC surgery. The annual birth cohort incidence of IC surgery in the general population ranged from 5.10 to 9.29 cases per 100,000 individuals. Among patients who had been followed up for longer than 1 year (n = 650), 92 (14.2%) developed glaucoma, and its incidence rate was 2.29 (95% confidence interval, 1.862.80) per 100 person-years. The mean time from IC surgery to glaucoma development was 4.7 +/- 3.5 years. No factors were identified as being associated with post-IC surgery glaucoma risk other than primary or secondary intraocular lens implantation, which reduces the risk (all P <.05). In patients without primary intraocular lens implantation, the risk of glaucoma increased steeply during the first 2 years after IC surgery. CONCLUSION: This study identified the birth cohort incidence of IC surgery and secondary glaucoma risk in individuals of East Asian ethnicity. These estimates may help to better understand the epidemiologic features and clinical courses of patients with IC. (Am J Ophthalmol 2023;246: 130-140. (c) 2022 Elsevier Inc. All rights reserved.)

Automated summary

The purpose of this study was to determine the incidence of infantile cataract (IC) surgery and the risk of secondary glaucoma in the Korean population. A retrospective cohort study was conducted using the Korean National Health Claims database. The study found that the annual incidence of IC surgery ranged from 5.10 to 9.29 cases per 100,000 individuals, and the incidence rate of post-IC surgery glaucoma was 2.29 per 100 person-years. Factors such as intraocular lens implantation were found to reduce the risk of post-IC surgery glaucoma.