Construction and validation of a prognostic prediction model based on albumin-bilirubin grade after resection of hepatocellular carcinoma

Table 2 Variable assignment and coding

Variables	Assignment of value
Sex	Female = 0, male = 1
Age	Continuous
Body mass index	Continuous
Smoking history	No = 0, yes = 1
Alcohol use	No = 0, yes = 1
History of diabetes	No = 0, yes = 1
Family history	No = 0, yes = 1
History of liver cirrhosis	No = 0, yes = 1
History of hepatitis B	No = 0, yes = 1
Tumor size	Continuous
Tumor number	Single = 0, multiple = 1
Portal hypertension	No = 0, yes = 1
Vascular invasion	No = 0, yes = 1
Perineural invasion	No = 0, yes = 1
Degree of differentiation	Well-differentiated = 0, moderately differentiated = 1, poorly differentiated = 2
Child-Pugh class	Class A = 0, class B = 1
AFP	Continuous
DCP	Continuous
ALT	Continuous
AST	Continuous
TBIL	Continuous
Albumin	Continuous
ALBI grade	Grade 1 = 0, grade 2/3 = 1

AFP: Preoperative alpha-fetoprotein; DCP: Des-gamma-carboxy prothrombin; ALT: Alanine aminotransferase; AST: Aspartate aminotransferase; TBIL: Total bilirubin; ALBI: Albumin-bilirubin.