Effect of brush rinse on the diagnostic accuracy of biliary stricture evaluation: A multicenter trial

Table 1 Baseline characteristics, n (%)

Demographic factors	N = 112
Age (years)	71.2 ± 9.6
Male sex	66 (58.9)
Baseline bilirubin level (mg/dL)	6.8 (2.1-13.4)
Baseline cancer antigen 19-9 level (IU/L)	220 (37-628.5)
Location of brushing
Common bile duct	66 (58.9)
Common hepatic duct	8 (7.1)
Hepatic hilum	36 (32.1)
Intrahepatic duct	2 (1.9)
Diagnosis
Malignancy
Pancreatic adenocarcinoma	32 (28.6)
Hilar cholangiocarcinoma	32 (28.6)
Distal cholangiocarcinoma	29 (25.9)
Gallbladder adenocarcinoma	7 (6.3)
Intrahepatic cholangiocarcinoma	2 (1.8)
Hepatocellular carcinoma	1 (0.9)
Benign
Benign common bile duct stricture	8 (7.1)
Immunoglobulin G 4-related sclerosing cholangitis	1 (0.9)

Values are expressed as mean ± SD, n (%), or median (interquartile range).