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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).