| | | AOE () | control () |
| | Age (years) | | | | Mean | 74.8 | 68.5 | | Range | 57–92 | 49–91 | | Sex | | | | Male | 51 | 14 | | Female | 14 | 6 | | Diagnosis | | | | Choledocholithiasis | 38 | 8 | | Obstructive jaundice | 19 | 6 | | Pancreatic cancer | 5 | 1 | | Gallbladder cancer | 5 | | | Bile duct cancer | 4 | 1 | | Hepatocellular carcinoma | 2 | | | Carcinoma of papilla of Vater | 1 | 3 | | Metastatic lymphadenopathy | 2 | | | Malignant lymphoma | | 1 | | Bile leakage | 2 | | | Pancreatic pseudocyst | 1 | | | Chronic pancreatitis | 2 | 2 | | Peribiliary cyst | 1 | | | Others | 2 | 4 |
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