Fig. 2From: Development and external validation of nomograms to predict the risk of skeletal metastasis at the time of diagnosis and skeletal metastasis-free survival in nasopharyngeal carcinomaCalibration plots for SMFS at 1, 3 and 5Â years in the training cohort (a, b, c) and validation cohort (d, e, f). Nomogram-predicted SMFS is plotted on the x-axis; actual rates of SMFS are plotted on the y-axis. The dashed lines along the 45-degree line through the origin represent the perfect calibration models in which the predicted probabilities are identical to the actual probabilities. SMFS, skeletal-metastasis free survivalBack to article page