Fig. 3

Scattered plot representing correlations of Aging (age of subjects), Cognitive impairment (both test 6-CIT and MMSE), and renal function (Uric acid and Urea levels in the blood). Correlation between age and cognitive impairment in control subjects (A) and DM-2 subjects (B); correlation between the levels of uric acid in control subjects (C) and Urea in DM-2 subjects (D) with cognitive impairment; correlation between age and the levels of uric acid in control subjects (E) and the levels of urea in DM-2 subjects (F). Simple linear regression was performed, ** p < 0.01; *** p < 0.001