What annual screening is recommended to detect early diabetic nephropathy?

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The key idea is that early diabetic nephropathy shows up as increased urinary albumin excretion before kidney function really declines. The best annual screen combines microalbuminuria testing with an estimate of GFR because it captures both the earliest sign of kidney involvement and the overall filtering function. Measuring urine albumin-to-creatinine ratio detects small, persistent amounts of albumin in the urine that standard tests can miss, signaling glomerular damage from diabetes. Estimating GFR from serum creatinine shows how well the kidneys are filtering and helps stage any CKD, guiding treatment decisions and medication dosing. Together, they provide a sensitive, practical way to detect nephropathy early; other options either assess aspects not specific to kidney injury (like serum glucose for glycemic control) or do not reveal early renal damage on their own.