Renal resistive index measurements by ultrasound in patients with liver cirrhosis: Magnitude and associations with renal dysfunction

Table 4 Discriminatory performance of renal resistive index for different phenotypes of acute kidney injury

Parameters	AUROC curve	RRI cut-off	Sensitivity	Specificity	PPV	NPV
ATN-AKI vs non-ATN AKI	94%	0.77	89%	96%	80%	98%
ATN-AKI vs HRS-AKI	94%	0.77	89%	98%	94%	97%
ATN-AKI vs PRA	93%	0.73	100%	89%	85%	100%
HRS-AKI vs non HRS-AKI	56%	0.72	94%	55%	78%	84%
HRS-AKI vs PRA	87%	0.71	95%	89%	96%	86%
PRA vs no-AKI	59%	0.59	76%	45%	36%	81%

AKI: Acute kidney injury; ATN: Acute tubular necrosis; AUROC: Area under receiver operating characteristic curve; HRS: Hepatorenal syndrome; NPV: Negative predictive value; PPV: Positive predictive value; PRA: Prerenal AKI; RRI: Renal resistive index.