There were significant differences (p < 0.05) among the three groups in terms of diabetes (p < 0.001), normal glucose tolerance (NGT) (p = 0.002), impaired glucose tolerance (IGT) (p = 0.015), creatinine (p = 0.020), triglycerides (p < 0.001), fasting glucose (p < 0.001), post-prandial glucose (p = 0.006), post-prandial insulin (p = 0.006) and HOMA-IR index (p = 0.032). The gene discussed is INS; the disease is Impaired glucose tolerance.