GPT and diabetes mellitus: In the subgroup analyses according to clinical features, such as having anemia with a 12 g/dL cutoff of hemoglobin, kidney function using an eGFR of 60 mL/min/1.73 m2, liver function using an AST or ALT of 40 IU/L, diabetes mellitus or glycemic control (A1c = 8.0%), and diuretics and thiazolidinedione medications, there were no significant differences in correlation coefficients between groups from Fisher z-tests (Table 3).