ACE and diabetes mellitus: In terms of medication, no one in the DM patient group took diuretics, and about 24.8% in the DN group took diuretics; about 19.4% of DM patients took angiotensin-converting enzyme inhibitors/angiotensin receptor blockers (ACEI/ARB), and about 52.43% of DM patients took ACEI/ARB, so the difference between the two was statistically significant (P <0.05).