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. 2022 Jun 23;3:100018. doi: 10.1016/j.bjao.2022.100018

Figure 2.

Figure 2

Calibration plots for predictions of 30-day mortality between 0% and 10% using SORT (a), NZRISK (b), P-POSSUM (c), and POSSUM (d). Dashed line represents perfect calibration, blue line is non-parametric smoothed best-fit curve, green bars are 95% confidence intervals. SORT, Surgical Outcome Risk Tool; POSSUM, Physiology and Operative Severity Score for the enumeration of Mortality; P-POSSUM, Portsmouth variant of POSSUM. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)