RBP4 and type 2 diabetes mellitus: The results screened out the following variables as influencingfactors for β values—BMI (p = 0.007), RBP4 (p <0.001), age (p < 0.001), creatinine (p = 0.013), LDL-C(p < 0.001), HDL-C (p < 0.001), hypertension (p < 0.001), smoking history (p < 0.001), T2DM (p < 0.001).Then, the above variables were incorporated into the multiple linear regressionmodel, and the following variables were found to significantly affect βvalues—RBP4 (p < 0.001), hypertension (p < 0.001), LDL-C(p < 0.001), age (p < 0.001), and T2DM (p <0.001), as detailed in Table 4.