Table 3.

Cutoff values of the NGAL in the eGFR categories of CKD2‐5

Parameter	Stages	AUC	95% CI	Sensitivity (%)	Specificity (%)	Youden index	Cutoff value (μg/L)
NGAL	2	0.857	0.780‐0.934	0.725	0.9	0.625	235.7
	3	0.869	0.812‐0.925	0.897	0.726	0.623	249.45
	4	0.892	0.845‐0.939	0.898	0.69	0.602	305.8
	5	0.897	0.848‐0.948	0.923	0.752	0.675	422.64

Abbreviation: NGAL, neutrophil gelatinase‐associated lipocalin.