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Evaluation of a telemedicine pilot project for hypertension in Korea: a nationwide real-world data study
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Jeong-Yeon Kim, Yeryeon Jung, Seongwoo Seo, Youseok Kim, Min Jung Ko, Hun-Sung Kim
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Epidemiol Health. 2025;e2025048. Published online August 25, 2025
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DOI: https://doi.org/10.4178/epih.e2025048
[Accepted]
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 Abstract
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Abstract
OBJECTIVES
A telemedicine pilot project has received temporary authorization in Korea. The clinical effectiveness of telemedicine is well established; however, ongoing research must assess medical utilization, sustainability, prescription continuity, and safety.
METHODS This study evaluated medical utilization, sustainability, prescription continuity, and safety before and after the implementation of a telemedicine pilot project between June 2022 and December 2023. Data were obtained from the Korean National Health Insurance Service (NHIS), and participants were divided into those who received non-face-to-face hypertension treatment at least once and those who did not.
RESULTS This study included 124,210 patients diagnosed with hypertension who received telemedicine (the Tele_G group) and 124,210 propensity score-matched control individuals. The difference-in-difference (DID) for medical utilization between the Tele_G and control groups was 0.10 (−0.03 vs. −0.12, p<0.001). The DID for the Modified Modified Continuity Index was −0.005 (−0.003 vs. 0.002, p<0.001), while that for Most Frequent Provider Continuity was −0.006 (−0.004 vs. 0.002, p<0.001). The DID for the prescription day rate was 0.41 (−0.61 vs. −1.02, p<0.001), and that for the appropriate prescription continuation rate was 0.52 (−1.23 vs. −1.75, p<0.005).
CONCLUSIONS Telemedicine did not fully achieve the same standard as face-to-face treatment for hypertension management; however, it showed comparable safety, suggesting potential as secondary care. As the first NHIS-based study on this topic in Korea, this research highlights the benefits of telemedicine when appropriately utilized for patients with hypertension. Nevertheless, due to limitations regarding long-term continuity and policy design, cautious interpretation is required, and further prospective studies are warranted.
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Summary
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