dCCA	distal cholangiocarcinoma
OS	overall survival
CINS	Cholangiocarcinoma Inflammation–Nutrition Score
CA19-9	carbohydrate antigen 19-9
TNM	tumor–node–metastasis
DFS	disease-free survival
IL-6	interleukin-6
TNF-α	tumor necrosis factor-alpha
CAR	C-reactive protein-to-albumin ratio
NLR	neutrophil-to-lymphocyte ratio
PNI	prognostic nutritional index
PLR	platelet-to-lymphocyte ratio
AJCC	American Joint Committee on Cancer
ERCP	endoscopic retrograde cholangiopancreatography
PTBD	percutaneous transhepatic biliary drainage
IQR	interquartile range
R0	no residual tumor
HR	hazard ratio
CI	confidence interval
VIF	variance inflation factor
AUC	area under the curve
ROC	receiver operating characteristic
DCA	decision curve analysis
NRI	net reclassification improvement
IDI	integrated discrimination improvement
PDGF	platelet-derived growth factor
STAT3	signal transducer and activator of transcription 3
HCC	hepatocellular carcinoma
PIPL	Personal Information Protection Law
ctDNA	circulating tumor DNA