Table 1. The demographic characteristics.

Demographic data	n
Patients	138
Age (years)	52.8±10.2
Gender
Male	63
Female	75
BMI (kg/m2)	23.3±1.8
ASA
I	91
II	39
III	8
Tumor location
Pancreatic head	62
Ampullary	28
Duodenum	32
Distal common bile duct	16
Type of pathology
Benign	72
Malignant	66
Tumor size (cm)	2.6±1.0

BMI, body mass index; ASA, American Society of Anesthesiology.