In addition, we found that there are some differences between the results of our study and previous studies: STAT4 rs7574865 gene polymorphism is a risk factor for increasing the risk of diabetes in Asians and Caucasians [27], while according to the results of this study, rs7574865 was only associated with the clinical indicator (cystatin C, p = 0.033). The gene discussed is CST3; the disease is diabetes mellitus.