Application of urinary N-acetyl-β-D-glucosaminidase combined with serum retinol-binding protein in early detection of diabetic nephropathy

Table 3 Efficacy analysis of urinary N-acetyl-β-D-glucosaminidase and serum retinol-binding protein expression for predicting diabetic nephropathy

Indicators	AUC	95%CI of AUC	SE	P value	Cut-off value	Specificity	Sensitivity	Youden index
Urine NAG	0.867	0.796-0.939	0.036	0.000	11.855 (U/L)	0.980	0.860	0.840
Serum RBP	0.951	0.902-1.000	0.025	0.000	39.620 (mg/L)	0.980	0.780	0.640
Combined diagnosis	0.974	0.936-1.000	0.020	0.000	-	0.980	0.940

NAG: N-acetyl-β-D-glucosaminidase; RBP: Retinol-binding protein; AUC: Area under the curve.