Abstract
Purpose
To determine the age- and sex-specific annual incidence rates of patients treated for VTDR and the factors associated with increased treatment rates in patients with type 2 diabetes mellitus (T2DM) in South Korea.
Methods
This was a nationwide, retrospective, 12-year, population-based study. Patients aged over 30 years who were diagnosed with T2DM between 2006 and 2017 were included in this study. We evaluated the national health claims data acquired from the Korean National Health Insurance Service database. Main outcome measures were the annual incidence rates of patients treated for VTDR and the associated risk factors.
Results
The age-adjusted annual incidence rate of patients treated for VTDR significantly decreased from 10.05 per 1000 T2DM patients in 2006 to 6.11 in 2017 (β = − 0.3192, P < 0.0001). The sex-adjusted annual incidence rate also significantly decreased in both men (β = − 0.2861, P < 0.0001) and women (β = − 0.3666, P < 0.0001). Cox hazard analysis showed that factors such as insulin use, young age, chronic kidney disease and male sex were significantly associated with increased rate of treatments for VTDR. In addition, the risk was lower for rural than for metropolitan residents.
Conclusions
Despite the increase in the number of T2DM patients in South Korea, the incidence rate of patients treated for VTDR decreases with early diagnosis and appropriate treatment. Therefore, it is important to detect and manage high-risk groups early to prevent visual impairment due to VTDR.
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Data availability
The data that support the findings of this study are available from National Health Insurance Service in South Korea but restrictions apply to the availability of these data, which were used under license for the current study, and so are not publicly available.
Code availability
Not Applicable.
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Funding
This work was supported by a National Health Insurance Ilsan Hospital grant (NHIS-2019–1-231). This study used data from the NHIS-NCS 2003–2017, which was released by the Korean National Health Insurance System.
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Ji Won Kim: substantial contributions to the conception or design of the work; or the acquisition, analysis, or interpretation of data for the work; drafting the work or revising it critically for important intellectual content.
Hyojin Seong: drafting the work or revising it critically for important intellectual content.
Kang Ju Son: substantial contributions to the conception or design of the work, or the acquisition, analysis, or interpretation of data for the work.
Eun Jee Chung: substantial contributions to the conception or design of the work; or the acquisition, analysis, or interpretation of data for the work; final approval of the version to be published; agreement to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.
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Approval was granted by the Institutional Review Board of the National Health Insurance Service Ilsan Hospital, Gyeonggi-do, Korea (NHIMC 2019–01-017). The study adhered to the tenets of the Declaration of Helsinki.
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Kim, J., Seong, H., Son, K.J. et al. Declined incidence of patients treated for vision-threatening diabetic retinopathy in South Korea: a 12-year nationwide population-based study. Graefes Arch Clin Exp Ophthalmol 260, 101–111 (2022). https://doi.org/10.1007/s00417-021-05365-z
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DOI: https://doi.org/10.1007/s00417-021-05365-z