ACE and type 2 diabetes mellitus: Basic status of the two groups: In 238 cases of the control group, 156 cases were male, 121 cases and 40 cases suffered from hypertension and type 2 diabetes respectively, 39 cases were smokers, 52 cases orally administered angiotensin-converting enzyme inhibitors (ACEI), 32 cases were administered angiotensin receptor antagonists (ARB), and 28 cases were administered calcium channel blockers (CCB).