Prevalence of and risk factors for gallstones in Uighur and Han Chinese

Table 1 Variable assignments

Name	Negative assignment	Positive assignment
Gender	Male = 0	Female = 1
Age	≤ 50 = 0	> 50 = 1
Ethnic group	Han = 0	Uighur = 1
Hypertension	Normal or less than normal = 0	Hypertension = 1
Diabetes	Normal or less than normal = 0	FPG ≥ 7.0 mmol/L = 1
Fatty liver	(- ) = 0	(+ ) = 1
TG	TG ≤ 1.70 mmol/L = 0	TG > 1.70 mmol/L = 1
TC	≤ 5.18 mmol/L = 0	> 5.18 mmol/L = 1
HDL-C	≥ 1.04 mmol/L = 0	< 1.04 mmol/L = 1

TG: Triglycerides; TC: Total cholesterol; HDL-C: High density lipoprotein cholesterol.