Research Article

Internal Validation of the Predictive Performance of Models Based on Three ED and ICU Scoring Systems to Predict Inhospital Mortality for Intensive Care Patients Referred from the Emergency Department

Figure 3

Calibration plots of the six models. A calibration plot is a measure of goodness-of-fit as a graphical presentation of the actual mortality probability versus the predicted mortality probability. The calibration plots of APACHE II, REMS, and SAPS II do not deviate much from the diagonal line, which represents perfect calibration.