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Fig. 3 | Annals of Intensive Care

Fig. 3

From: The prognostic accuracy evaluation of SAPS 3, SOFA and APACHE II scores for mortality prediction in the surgical ICU: an external validation study and decision-making analysis

Fig. 3

Prediction models calibration plots. af Groups covering the entire predicted intra-ICU (ac) or in-hospital (df) mortality probabilities calculated by each severity score (on the x-axis) plotted against observed frequencies (on the y-axis) (Dots linked by the black line). A LOWESS line (red), spanning 75% of local values, was created for each dataset to clarify the relationship between assessed variables and to shed light on the direction and magnitude of model miscalibration across the probability range. g, h The ratios of observed over expected intra-ICU (g) or in-hospital (h) mortality probabilities, calculated by each prediction model (on the y-axis), were plotted against sequential clusters of risk (on the x-axis) to allow direct comparison between severity scores. Linear trend lines were created to aid in comparison. Orange line—APACHE II; black line—SAPS 3; blue line—SOFA

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