CACNA1C and type 2 diabetes mellitus: Further,AUC values of ITIH3 (AUC = 0.833), FGF1 (AUC = 0.792), NRCAM (AUC = 0.847), AGER (AUC = 0.764), and CACNA1C (AUC = 0.750) were all greater than 0.7, indicating that diagnostic genes had strong diagnostic power for T2DM (Figure 3B).