ROC curves with 95% CI of the logistic regression models and ferritin. Panels A-B have ferritin (light green) and ModelAIC (yellow). The P values for the difference of the AUCs were 0.78 for females and 0.57 for males. Panels C-D have ROC curves for ferritin (light green) and ModelFe (brown). With them, the P values for the difference of the AUCs were 0.04 for females and 0.82 for males.