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Exploring the causal relationship between length of stay in hospitals and treatment outcome: Evidence from Japanese AMI patients

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Author Info

  • Satoshi Shimizutani

    (Research Fellow, Gender Equality Bureau, Cabinet Office)

  • Hiroyuki Yamada

    (Associate Professor, Osaka School of International Public Policy (OSIPP))

  • Haruko Noguchi

    (Professor, Faculty of Political Science and Economics, Waseda University)

  • Yuichiro Masuda

    (MD, Director of Medicine, Gifu Health Management Center)

  • Masafumi Kuzuya

    (MD, Professor, Graduate School of Medicine, Nagoya University)

Abstract

In this study, we explore the causal relationship between length of stay (LOS) in hospitals and the treatment outcome for Acute Myocardial Infarction (AMI) patients in Japan, where the average LOS (ALOS) is the longest among OECD countries. Using chart-based data, we address the endogeneity between LOS and treatment outcome by using an exogenous variation based on Rokuyo (the six basic labels allocated to each weekday), which is found to be irrelevant to admission day but relevant to discharge day. While we do find a significant association between LOS and rehospitalization probability in the ordinary least squares (OLS) estimation, we do not find a significant relationship once LOS is instrumented by the six basic labels in various instrumental variable estimations. This implies that additional stay that was induced owing to patient's choice of preferred Rokuyo at discharge has no effect on rehospitalization probability.

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File URL: http://www.osipp.osaka-u.ac.jp/archives/DP/2013/DP2013E006.pdf
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Bibliographic Info

Paper provided by Osaka School of International Public Policy, Osaka University in its series OSIPP Discussion Paper with number 13E006.

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Length: 31 pages
Date of creation: Sep 2013
Date of revision:
Handle: RePEc:osp:wpaper:13e006

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Keywords: Japan; Rokuyo; Length of stay; Hospitals; Rehospitalization; Health expenditure.;

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  1. Haruko Noguchi & Satoshi Shimizutani & Yuichiro Masuda, 2008. "Regional variations in medical expenditure and hospitalization days for heart attack patients in Japan: evidence from the Tokai Acute Myocardial Study (TAMIS)," International Journal of Health Care Finance and Economics, Springer, vol. 8(2), pages 123-144, June.
  2. David M. Cutler & Mark McClellan & Joseph P. Newhouse & Dahlia Remler, 1998. "Are Medical Prices Declining? Evidence From Heart Attack Treatments," The Quarterly Journal of Economics, MIT Press, vol. 113(4), pages 991-1024, November.
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