Figure 1. Endothelin-1(ET-1)/creatinine expression is positively correlated with HbA1c expression in elderly patients with diabetes mellitus (DM). (A–C) ELISA analysis indicates higher serum ET-1 and creatinine levels with higher HbA1c(R = 0.74). (D) Correlation between levels of HbA1c and diseases duration in elderly patients with DM (R = 0.58). (E) Serum ET-1 was higher with longer disease duration and lower bioelectrical impedance analysis values (R = 0.71). (F) Correlation between levels of serum creatinine and diseases duration with DM (R = 0.68).