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Abstract Details
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Activity Number:
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454
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Type:
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Topic Contributed
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Date/Time:
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Wednesday, August 3, 2011 : 8:30 AM to 10:20 AM
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Sponsor:
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Section on Quality and Productivity
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| Abstract - #301035 |
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Title:
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Effect of Correlations on Risk-Adjusted CUSUM Charts for Monitoring Binary Outcomes
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Author(s):
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Abdul K. Hussein*+ and Abdullah Kasem and Severien Nkurunziza and Stefano Campostrini
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Companies:
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University of Windsor and University of Windsor and University of Windsor and Ca Foscari University
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Address:
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, Windsor, ON, , Canada
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Keywords:
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CUSUM ;
Autocorrelation ;
Binary outcomes
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Abstract:
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Recently, monitoring health care outcomes, such as post-operative mortality rates has become common and new statistical methodologies have started to emerge for this purpose. One of such methodologies is the risk adjusted CUSUM chart (RA-CUSUM) for monitoring binary outcomes such as mortality after cardiac surgery. However, it is common to assume that the observations being monitored, which often come from the same surgeon or institution, are independent. In this talk, we examine the effect of various types of autocorrelations on the performance of the RA-CUSUM charts in terms of their Average Run Lengths (ARL). We give a brief discussion of other possible shortcomings of the RA-CUSUM and remedies for these issues.
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