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Subgroup analyzes of the association between dietary inflammatory index (DII) and the development of gallstone disease (GSD). OR, odds ratio; CI, confidence interval. Sample-weighted logistic regression models were applied. Each stratification was adjusted for confounding factors such as age group, sex, race and ethnicity, sedentary activity, obesity, alcohol drinking status, smoking status, fatty liver, diabetes, and thyroid disease except the stratification factor itself.
