Table 4.

Analysis between METS-IR index with age at the first gallbladder stone operation.

Characteristic	Model 1 β (95%CI)	Model 2 β (95%CI)	Model 3 β (95%CI)
METS-IR Index	-0.24 (-0.33, -0.15)	-0.25 (-0.34, -0.17)	-0.26 (-0.35, -0.17)

Model 1=no covariates were adjusted.

Model 2=Model 1+age, gender, race education, marital status were adjusted.

Model3=Model 2+, diabetes, blood pressure, PIR, total water, total kcal, total sugar, smoked, physical activity, alcohol use, serum cholesterol were adjusted.