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Fig. 4 | Radiation Oncology

Fig. 4

From: Predictive model of the first failure pattern in patients receiving definitive chemoradiotherapy for inoperable locally advanced non-small cell lung cancer (LA-NSCLC)

Fig. 4

The validation of nomogram. a Average ROC curve of the prediction model with 5-fold nested cross-validation. The average AUC of the 5-fold validation was 0.719. b Calibration curve of the nomogram model to predict distant failure. The x-axis and y-axis represent the predicted and actual probabilities of occurring distant failure, respectively. The blue diagonal 45 line correspond to the perfect prediction, and the orange dotted line represent the predictive performance of the nomogram. The closer the dotted line fitted to the diagonal line, the better the prediction performance was. c Decision curve of the nomogram to predict distant failure in the whole dataset. The x-axis and y-axis measure the threshold probabilities and net benefit, respectively. The latter is calculated by adding the true positives and subtracting the false positives. The horizontal line along the x-axis assumes that no patient will occur distant failure, the solid gray line assumes that all patients will occur distant failure at a specific threshold probability. The solid blue line means the net benefit with using the nomogram

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