The indexes with statistical differences in correlation analysis (Mg, P, and Alb) and two dummy variables (different genders and diabetes histories) were included in the regression analysis, and the result showed that Ln_PTH was positively associated with P (P <0.01) and Alb (P <0.05) but negatively associated with Mg (P <0.05) and Ca (P <0.05) (Table 3). This evidence concerns the gene PTH and diabetes mellitus.