CCHT Certification Practice Exam 2026 – Complete Study Resource

Diabetes mellitus is the most common cause of chronic kidney disease in adults because long-standing high blood sugar directly damages the kidneys over time. Chronic hyperglycemia leads to changes in the kidneys’ filtering units: the glomerular basement membrane thickens, mesangial cells expand, and small vessels sustain damage. This injury increases leakage of albumin into the urine (microalbuminuria), and with ongoing damage the kidneys progressively lose function, eventually leading to chronic kidney disease.

This condition, often called diabetic nephropathy, is tied to how prevalent diabetes is in the population and how persistent hyperglycemia accelerates kidney injury. Hypertension is a major risk factor and commonly accompanies diabetes, and it also contributes to kidney damage, but diabetes itself is the primary driver of CKD in the United States. Other listed causes like glomerulonephritis and polycystic kidney disease do cause CKD, but they are far less common overall compared with diabetic kidney disease.

Understanding this helps you recognize why tight glycemic control and blood pressure management are crucial in patients with diabetes to slow the progression of kidney disease. Early detection via annual screening for albumin in urine and the use of kidney-protective medications like ACE inhibitors or ARBs when appropriate are key parts of slowing progression.