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Title: Phase I study of surgical performances with risk-adjusted Shewhart control charts
Authors: Zhang, L.
Gan, F.F. 
Loke, C.K.
Keywords: Likelihood ratio test
Logistic regression
Parsonnet score
Patient case-mix
Predicted risk
Statistical process control
Issue Date: Dec-2012
Citation: Zhang, L.,Gan, F.F.,Loke, C.K. (2012-12). Phase I study of surgical performances with risk-adjusted Shewhart control charts. Quality Technology and Quantitative Management 9 (4) : 375-382. ScholarBank@NUS Repository.
Abstract: Monitoring a surgical process has gained prominence in recent years. A number of risk-adjusted charting procedures have been developed for this purpose. For the control limits of charting procedures in a phase II monitoring to be accurate, they must be based on data taken from a process that is in control. We propose using a risk-adjusted Shewhart chart for a phase I study because of its ability to detect extreme observations from out of control processes. The statistic used is shown to be a likelihood ratio test statistic. A real data set is used to illustrate the procedure. © 2012 ICAQM.
Source Title: Quality Technology and Quantitative Management
ISSN: 16843703
Appears in Collections:Staff Publications

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