ANPEP and type 1 diabetes mellitus: In type 1 diabetes ApN correlated significantly (P < 0.05) with HCY (r = 0.57), CrCL (r = −0.61), AER (r = 0.61), and creatinine (r = 0.40), and in type 2 diabetes it correlated with HCY (r = 0.25), CrCl (r = −0.22), creatinine (r = 0.20), and diastolic BP (r = −0.19).