Figure 4
From: Predicting hospital cost in CKD patients through blood chemistry values
Receiver operating curve (ROC) curve for PTH, PO4 and serum albumin versus HCH. The center diamond line represents the true positive fraction(TPF) for HCH in patients with a calculated sum for the linear predictor defined as the linear combination for PTH, PO4 and albumin. The upper and lower gray lines represent the 95% confidence levels. The Y axis = True Positive Fraction (i.e. Sensitivity) versus the X axis for False Positive Fraction (i.e. 1-specificity).