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Table 6 Sensitivity and specificity at different cutoff values in U-NGAL receiver operating characteristic curve analysis predicting DGF and prolonged DGFa

From: Deceased donor neutrophil gelatinase-associated lipocalin and delayed graft function after kidney transplantation: a prospective study

U-NGAL cutoff level, ng/mL DGF Prolonged DGF
  Sensitivity Specificity PPV NPV Sensitivity Specificity PPV NPV
4 77.3% 28.4% 0.42 0.65 82.6% 27.6% 0.16 0.91
9 60.6% 54.9% 0.47 0.68 47.8% 49.7% 0.14 0.85
18 37.9% 77.5% 0.53 0.65 47.8% 74.5% 0.24 0.90
20 34.8% 79.4% 0.53 0.65 43.5% 76.6% 0.24 0.89
  1. aNPV, negative predictive value; PPV, positive predictive value. The selected cutoff values are the lowest quartile (4 ng/mL), the median (9 ng/mL), the mean (18 ng/mL) and the highest quartile (20 ng/mL).