Table 5.

Values of area under receiver operating characteristic curve stratified for severity of acute kidney injury

Study	RIFLE R or above	RIFLE I or above	RIFLE F	AKIN I	AKIN II, III combined
de Geus et al. [21] (plasma)	0.77 ± 0.05	0.80 ± 0.06	0.86 ± 0.06	-	-
de Geus et al. [21] (urine)	0.80 ± 0.04	0.85 ± 0.04	0.88 ± 0.04	-	-
Siew et al. [29] (urine)	-	-	-	0.62 (0.54-0.70)	0.71 (0.59-0.83)

Area under receiver operating characteristic curve presented as ± 2 × standard errors or (95% confidence intervals). AKIN, Acute Kidney Injury Network; RIFLE, Risk, Injury, Failure, Loss, and End-stage kidney disease.