Fig. 3.
(A) Distribution of serum neutrophil gelatinase-associated lipocalin (S-NGAL) values obtained from donors with subsequent abnormal graft function in recipients at day 8 (red dashed line) and from donors with subsequent normal graft function in recipients at day 8 (blue solid line). The density function reflects the number of patients with a given value of S-NGAL. (B) Receiver operator characteristic (ROC) curve for S-NGAL to predict the failure to return to a normal renal graft function at day 8 postgraft. A normal graft function at day 8 was defined as urine output greater than 1,000 ml/day and creatinine less than 167 μmol/l during two consecutive days at day 8 posttransplantation.12,25 The area under the ROC curve was 0.51 (95% CI, 0.44 to 0.59). No cutoff value could be identified.