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Did Expanded Dental Insurance Reduce Out-of-Pocket Expenditures on Dental Care among Older Adults in Korea? Interrupted Time-Series Analysis

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  • Nam-Hee Kim

    (Department of Dental Hygiene, Wonju College of Medicine, Yonsei University, 20 Ilsan-ro, Wonju 26426, Korea
    Department of Social and Behavioral Sciences, Harvard T. H. Chan School of Public Health, 667 Huntington Avenue, Boston, MA 02115, USA)

  • Se-Hwan Jung

    (Department of Preventive and Public Health Dentistry, College of Dentistry, Gangneung-Wonju National University & Research Institute of Oral Science, Gangneung-Wonju National University, Gangneung 25457, Korea)

  • Ichiro Kawachi

    (Department of Social and Behavioral Sciences, Harvard T. H. Chan School of Public Health, 667 Huntington Avenue, Boston, MA 02115, USA)

Abstract

The Korean National Health Insurance extended its coverage to reduce the economic burden of receiving dentures and implants for older adults in 2012 and 2014, respectively. We examined whether the new policy resulted in reduced out-of-pocket dental care expenditure in the eligible population, specifically focusing on low-income adults. We used interrupted time-series analysis (ITSA), a quasi-experimental design, to identify the effects of the policy among persons aged 65 or older. Data were extracted from the Korea Health Panel Survey (KHP; 2008–2017). The main outcome was out-of-pocket expenditures on dental care. The ITSA showed that expenditures decreased annually by 4.5% (RR: 0.96, 95% CI: 0.95–0.96) between 2012 and 2014. However, expenditure increased by 7.8% (RR: 1.08, 95% CI: 1.07–1.08) after 2014. Dental insurance coverage did not contribute to reducing the out-of-pocket expenses for dentures among low-income adults, while coverage of dental implants led to an increase in dental expenditure.

Suggested Citation

  • Nam-Hee Kim & Se-Hwan Jung & Ichiro Kawachi, 2021. "Did Expanded Dental Insurance Reduce Out-of-Pocket Expenditures on Dental Care among Older Adults in Korea? Interrupted Time-Series Analysis," IJERPH, MDPI, vol. 18(6), pages 1-9, March.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:6:p:3003-:d:517416
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    References listed on IDEAS

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    1. Tomoko Kodama & Yusuke Ida & Katsuo Oshima & Hiroko Miura, 2021. "Are Public Oral Care Services Evenly Distributed?—Nation-Wide Assessment of the Provision of Oral Care in Japan Using the National Database of Health Insurance Claims," IJERPH, MDPI, vol. 18(20), pages 1-15, October.

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