FABP2 and Hyperglycemia: At first glance, the results in all participants seem to be the combination of two groups: correlation analysis showed the serum I-FABP level was positively associated with the duration of hyperglycemia, age, and glycemic variability but negatively associated with islet beta-cell function; multivariate linear regression analysis showed that the serum I-FABP level was associated with both age and the duration of hyperglycemia.