Table 4.

The receiver operating characteristic (ROC) analysis of serum and urinary cystatin C and neutrophil gelatinase-associated lipocalin (NGAL) relative to kidney dysfunction in horses

Parameter		Cut-off value	Sensitivity	Specificity	Positive predictive value	Negative predictive value	AUC
NGAL	Serum	95.20	0.54	0.93	0.60	0.92	0.73
	Urine	33.10	0.64	0.71	0.30	0.90	0.66
Cystatin C	Serum	0.53	0.64	0.85	0.44	0.93	0.67
	Urine	0.20	0.82	0.85	0.50	0.96	0.84

AUC – area under the ROC