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Actual mortality and the ratio of actual mortality to predicted mortality (A/P ratio, the risk-
adjusted mortality rate) are also shown. A similar predicted risk of mortality across the case
volume strata and a decrease in the actual mortality at higher center case volume are seen. Used
with permission from Mori, et al. Ann orac Surg. 2018;106:1095-1104.
Figure 15. Predicted Risk of Mortality Derived From the
Logistic Regression Model Without Center Case
Volume as a Covariate
