NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

NBER Working Papers by Renee Y. Hsia

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Working Papers

January 2011Does Decreased Access to Emergency Departments Affect Patient Outcomes? Analysis of AMI Population 1996-2005
with Yu-Chu Shen: w16690
We analyze whether decreased emergency department access (measured by increased driving time to the nearest ED) results in adverse patient outcomes or changes in the patient health profile for patients suffering from acute myocardial infarction. Data sources include 100% Medicare Provider Analysis and Review, AHA hospital annual surveys, Medicare hospital cost reports, and longitude and latitude information for 1995-2005. We define four ED access change categories and estimate a zip codes fixed-effects regression models on the following AMI outcomes: time-specific mortality rates, age, and probability of PTCA on the day of admission. We find a small increase in 30-day to 1-year mortality rates among patients in communities that experience <10-minute increase in driving time. Among patie...

Published: Shen, Y. and Hsia, RY. 2012. Does Decreased Access to Emergency Departments Affect Patient Outcomes? Analysis of AMI Population 1996-2005. Health Services Research, 47(1, Part 1): 188-210.

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