Fig. 2

ROC curves of APN ≥ 12.24, Scr ≥ 124 and APN ≥ 12.24 plus Scr ≥ 124 for predicting CIN. AUC of UAPN > 12.24 μmol/L was 0.726 (95%CI: 0.614–0.837, P < 0.01), AUC of Scr > 124 μmol/l was 0.650 (95%CI: 0.537–0.763, P < 0.01), and AUC of UAPN > 12.24 μmol/L plus Scr > 124 μmol/L was 0.751 (95%CI: 0.626–0.876 P < 0.01). ROC = receiver operator characteristic; AUC = area under the curve; UAPN = urinary adiponectin; Scr = serum creatinine; Scr = serum creatinine