GPT and gallstones: NAFLD: non-alcoholic fatty liver disease, NASH: non-alcoholic steatohepatitis, BMI: body mass index, DM: diabetes mellitus, CI: confidence interval, ALT: alanine transaminase, HOMA: homeostatic model assessment (quantifies insulin resistance), LDL: low-density lipoprotein, ALP: alkaline phosphatase, HDL: high-density lipoprotein, FPG: fasting plasma glucose, OR: odds ratio, GS: gallstones, USG: ultrasonogram, GD: gallstone disease.