At the same time, decision curve analysis (DCA) is used to determine the net benefit threshold of prediction.<h4>Results</h4>The findings indicated that age, albumin levels, etiology of biliary stricture, stenosis site, diabetes, digestive tract reconstruction, obstruction length and the use of cholangioscopy may be factors that influence postoperative biliary tract infection in patients with biliary stenosis. This evidence concerns the gene ALB and cholangitis.