Table 1.

United network for organ-sharing (UNOS) liver status classification.

Status 1	Fulminant liver failure with life expectancy <7 days
	(i) Fulminant hepatic failure as traditionally defined
	(ii) Primary graft nonfunction <7 days of transplantation
	(iii) Hepatic artery thrombosis <7 days of transplantation
	(iv) Acute decompensated Wilson's disease
Status 2a	Hospitalized in ICU for chronic liver failure with life expectancy <7 days, with a Child-Pugh score of ≥10 and one of the following:
	(i) unresponsive active variceal hemorrhage
	(ii) hepatorenal syndrome
	(iii) refractory ascites/hepatic hydrothorax,
	(iv) Stage 3 or 4 hepatic encephalopathy
Status 2B	Requiring continuous medical care, with a Child-Pugh score of ≥10, or a Child-Pugh score ≥7 and one of the following:
	(i) unresponsive active variceal hemorrhage
	(ii) hepatorenal syndrome
	(iii) spontaneous bacterial peritonitis
	(iv) refractory ascites/hepatic hydrothorax,
	or presence of hepatocellular carcinoma
Status 3	Requiring continuous medical care, with a Child-Pugh score of ≥7, but not meeting criteria for Status 2B
Status 7	Temporary inactive

From http://www.unos.org/ initially implemented in July 1997 later modified in January 1998 and August 1998.