Validation of the Model of End-Stage Liver Disease for Liver Transplant Allocation in Alberta: Implications for Future Directions in Canada

Table 2

CanWAIT allocation system.

CanWAIT	Definition
4F	ALF in ICU on ventilator
4	Chronic liver disease in ICU on ventilator
3F	ALF in ICU not requiring mechanical ventilation
3	Chronic liver disease in ICU for Grade 3 or 4 encephalopathy or renal dysfunction but not requiring ventilation
2	Chronic liver disease in hospital
1T	Chronic liver disease at home with HCC
1	Chronic liver disease at home
0	On hold for liver transplantation

Note: Organs were shared nationally for urgent status (3F, 4, 4F) until May 2010 after which national sharing was restricted to patients with acute liver failure only (3F, 4F).
Abbreviations: ALF, acute liver failure; ICU, intensive care unit; HCC, hepatocellular carcinoma.