INS and endothelial dysfunction: To clarify the determinants of postprandial endothelial dysfunction, we assessed relations between the postprandial change in RHI and other variables (age, sex, BMI, or level of serum creatinine, eGFR, HbA1c, 1,5-AG, GA, HOMA-IR, T-CHOL, HDL-C, LDL-C, CPK, NT-proBNP and postprandial changes in plasma glucose, serum insulin, TG, hs-CRP, and d-ROMs).