The chi-square test, Pearson correlation analysis, hierarchical regression analysis, and t-test were used to explore the relationships between Ln_PTH and gender, diabetes history, Mg, P, Ca, albumin (Alb), red blood cells (RBC), hemoglobin (Hb), white blood cells (WBC), and platelet (Plt). This evidence concerns the gene GSTM1 and diabetes mellitus.