What is the most common cause of chronic kidney disease in adults in the United States?

• A. Diabetes mellitus
• B. Hypertension
• C. Glomerulonephritis
• D. Polycystic kidney disease

Answer: (A)

The main idea is that long-term metabolic and vascular damage from diabetes is the most common path to chronic kidney disease in adults in the United States. Persistent high blood sugar drives diabetic nephropathy, where the kidney’s small vessels become damaged, leading to glomerular changes and leakage of albumin early on, followed by a gradual drop in filtration as nephron units are lost. This progression is why diabetes is the leading cause of CKD—more common than high blood pressure alone in causing kidney damage, though hypertension often accompanies diabetes and also contributes to kidney decline. Other conditions like glomerulonephritis or polycystic kidney disease can cause CKD, but they account for a smaller share of cases in the general population. Recognizing diabetes as the top driver underlines the importance of tight glycemic control and kidney-protective strategies (such as BP control with ACE inhibitors or ARBs) to slow CKD progression.