Table 1.

Instructions of assignment of variables for polypoid lesions of gallbladder

	Female = 0	Male = 1
BMI	(< 28) = 0	(≥ 28) = 1
T-Cho	Normal or decreased = 0	Increased = 1
TG	Normal or decreased = 0	Increased = 1
HDL-C	Normal or increased = 0	Decreased = 1
LDL-C	Normal or decreased = 0	Increased = 1
Blood glucose	Normal or decreased = 0	Increased = 1
HBsAg	(-) = 0	(+) = 1
Gallstones	(-) = 0	(+) = 1
Fatty liver	(-) = 0	(+) = 1

BMI: Body mass index; T-Cho: Cholesterol; TG: Triglyceride; HDL-C: High density lipoprotein; LDL-C; Low density lipoprotein; HBsAg: Hepatitis B surface antigen.