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Receiver operating curves (ROC) urinary NGAL to detect scar in APN patients with and without scar. Upper curve shows urinary NGAL (area under curve [AUC] = 0.73 [SE: 0.071, 95% CI: 0.59 to 0.87]) with sensitivity 81.3% and sensitivity 0.66%. Lower curve shows ROC curve analysis for NGAL/Cr ratio; AUC = 0.47, SE: 0.09, 95% CI: 0.3 to 0.63, sensitivity 56% and specificity 0.4 ng/ml.
