Cut off

Sensitivity

Specificity

PPV

NPV

Accuracy

Creatinine

>0.23 mg/dl

100

100

100

100

100

Urea

>0.41 mg/dl

100

100

100

100

100

b-hCG

20 mIU/ml

83

100

100

85.6

91

AFI

≤5

33.2

97.4

96.3

42.1

0.67