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The impact of revision for coinsurance rate for elderly on healthcare resource utilization: a pilot study using interrupted time series analysis of employee health insurance claims data

Author

Listed:
  • Nishi, Takumi

Abstract

Cost sharing, including copayment and coinsurance, is often used as a means of containing medical expenditure by reducing unnecessary or excessive use of health-care resources. Previous studies have reported the effects of reducing the coinsurance rate in Japan from 30% to 10% on demand for medical care among people aged 70 years. However, the coinsurance rate in Japan for individuals aged 70–74 years old has recently been increased from 10% to 20%. This study aimed to estimate the economic impact of coinsurance rate revision on health-care resource utilization using interrupted time-series analysis of employee health insurance claims data. I classified those who were born in FY 1944 and whose coinsurance rates decreased to 20% into the 10%-reduction group. It was found that the 10%-reduction group showed a lower increase of health-care utilization than the 20%-reduction group. However, no significant differences were observed in the overall and inpatient settings. The results of this study suggest that increasing the coinsurance rate among elderly people would reduce outpatient health-care resource utilization; however, it would not necessarily reduce overall health-care resource utilization.

Suggested Citation

  • Nishi, Takumi, 2018. "The impact of revision for coinsurance rate for elderly on healthcare resource utilization: a pilot study using interrupted time series analysis of employee health insurance claims data," MPRA Paper 86329, University Library of Munich, Germany.
    • Handle: RePEc:pra:mprapa:86329
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    References listed on IDEAS

    as
    1. Hitoshi Shigeoka, 2014. "The Effect of Patient Cost Sharing on Utilization, Health, and Risk Protection," American Economic Review, American Economic Association, vol. 104(7), pages 2152-2184, July.
    2. Fukushima, Kazuya & Mizuoka, Sou & Yamamoto, Shunsuke & Iizuka, Toshiaki, 2016. "Patient cost sharing and medical expenditures for the Elderly," Journal of Health Economics, Elsevier, vol. 45(C), pages 115-130.
    3. Takaku, Reo, 2016. "Effects of reduced cost-sharing on children's health: Evidence from Japan," Social Science & Medicine, Elsevier, vol. 151(C), pages 46-55.
    4. Ariel Linden, 2015. "Conducting interrupted time-series analysis for single- and multiple-group comparisons," Stata Journal, StataCorp LP, vol. 15(2), pages 480-500, June.
    Full references (including those not matched with items on IDEAS)

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    More about this item

    Keywords

    Coinsurance; Healthcare resource utilization; Elderly;
    All these keywords.

    JEL classification:

    • I13 - Health, Education, and Welfare - - Health - - - Health Insurance, Public and Private
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health

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