ROC curves of CP ratio, CA ratio, prealbumin, and albumin for the differential diagnosis between severe and moderate malnutrition according to GLIM criteria are displayed in Figure 1B. When comparing the ROC curves, the CP ratio had higher accuracy in detecting severe malnutrition than prealbumin (p = 0.002), and the CA ratio was also better than albumin (p = 0.044). Here, CP is linked to malnutrition.