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. Author manuscript; available in PMC: 2017 Mar 20.
Published in final edited form as: JACC Cardiovasc Interv. 2014 Dec 10;8(1 Pt A):10–16. doi: 10.1016/j.jcin.2014.07.025

FIGURE 3. Observed/Expected Mortality by Hospital Risk Quintile in a “Concentrated Risk Year” Versus an Average Year.

FIGURE 3

Observed versus expected mortality (O/E) ratios when the highest-risk cases or concentrated into a single year compared with overall O/E ratio in an average year show there is still a 1:1 relationship at all levels of risk. The 95% confidence intervals are shown with dotted lines, and a regression line fit to the hospital data shows consistent agreement between concentrated risk year and average year performance.