Table 2.

Baseline characteristics of ERCP group

Characteristic	Value
No. of patients	32
Age, yr	64.0 ± 7.7
Sex, male/female	23/10
Body mass index	25.2 ± 3.4
Laboratory findings
ALP, IU/L	758.5 ± 483.1
ALT, IU/L	132.8 ± 152.2
P-amylase, U/L	223.4 ± 569.0
Total bilirubin, mg/dL	5.5 ± 6.2
CA 19-9, U/mL	557.5 ± 1,191.2
CEA, ng/mL	4.3 ± 3.8
Location
Distal	22
Mid	4
Proximal	7

Values are presented as mean ± SD.

ERCP, endoscopic retrograde cholangiopancreatography; ALP, alkaline phosphatase; ALT, alanine transaminase; P-amylase, pancreatic amylase; CA 19-9, cancer antigen 19-9; CEA, carcinoembryonic antigen.