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Fig. 3 | World Journal of Surgical Oncology

Fig. 3

From: Optimization of the preoperative requirements of blood units for the surgical treatment of extra-abdominal soft tissue sarcoma: the TRANSAR score

Fig. 3

The predicted probability is plotted against the observed probability. The ROC analysis of TRANSAR showed the calculated area under the curve (AUC) of the five evaluated variables by 0.905. Dxy—Somer’s Dxy rank correlation between p and y [2(C − .5), C = ROC area]; R2—Nagelkerke-Cox-Snell-Maddala-Magee R-squared index; D—Discrimination index D [ (logistic model L.R. χ2 − 1)/n], L.R. χ2, its P-value; U—Unreliability index, χ2 with 2 d.f. for testing unreliability (H0: intercept = 0, slope = 1), its P-value; Q—the quality index; Brier score—average squared difference in p and y; intercept and slope; Emax—maximum absolute difference in predicted and loess-calibrated probabilities; Eavg—the average in same; E90—the 0.9 quantile of same; Sz/Sp—Spiegelhalter Z-test for calibration accuracy, and its two-tailed P-value

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