Kidney & Nephrology KDIGO Proteinuria Staging

Urine Albumin-to-Creatinine Ratio (ACR) Guide

Evaluate early kidney filter leakage, microalbuminuria, and diabetic kidney risk from your urine spot test values.

Clinical Oversight: Dr. N. Karthickeyan, MCh Urology — Senior Urologist & Renal Specialist
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From routine urine microalbumin lab test
Urine creatinine value in mg/dL
Specialist Oversight

Dr. N. Karthickeyan, MCh Urology

Senior Urologist & Renal Specialist

Early diagnosis of kidney dysfunction protects your heart, blood vessels, and vital organs. Routine eGFR and hydration checks save kidneys.
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Clinical Basis

The Urine Albumin-to-Creatinine Ratio (uACR) measures the milligrams of albumin leaked into urine per gram of creatinine. It is superior to a simple dipstick test because it compensates for variations in urine concentration.

Reference Guidelines

  • A1: Normal (< 30 mg/g): Healthy kidney filtration barrier. No abnormal protein leakage detected.
  • A2: Microalbuminuria (30–300 mg/g): Early warning sign of kidney filter stress. Reversible with blood pressure control (ACEi/ARBs) and strict blood sugar management.
  • A3: Macroalbuminuria (> 300 mg/g): Significant protein leakage and glomerular damage. Requires prompt specialist nephrology management and organ protection.

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