Risk factors for hepatic encephalopathy after transjugular intrahepatic portosystemic shunt in cirrhotic patients: A comprehensive minireview

Table 1 West Haven criteria for semi-quantitative grading of hepatic encephalopathy

Grade	Manifestation
Grade 0	No overt symptoms; mild cognitive impairment detectable only by specialized tests (e.g., neuropsychological tests)
Grade 1	Mild consciousness disturbance; euphoria and/or anxiety; inattention; impaired ability to perform simple addition
Grade 2	Lethargy or apathy; mild disorientation for time or place; subtle personality changes; inappropriate behavior; impaired ability to perform simple subtraction
Grade 3	Somnolence to semi-stupor but responsive to verbal stimuli; confusion; gross disorientation
Grade 4	Coma (unresponsive to verbal or painful stimuli)