Testing for albuminuria in 2014.

Area of Science:

• Nephrology
• Diabetology
• Cardiology

Background:

• Routine urinary albumin quantification is recommended for Canadians with diabetes.
• Traditional interpretation of albuminuria (microalbuminuria: 30-300 mg/day; overt nephropathy: >300 mg/day) has limitations.
• Elevated albumin excretion below traditional thresholds is linked to increased cardiorenal risk.

Purpose of the Study:

• To address controversies in interpreting urinary albumin levels in diabetic patients.
• To highlight the updated Canadian Diabetes Association guidelines for urine albumin-to-creatinine ratio (ACR) thresholds.
• To emphasize the importance of identifying increased cardiorenal risk in diabetic individuals.

Main Methods:

• Utilized the random urine albumin-to-creatinine ratio (ACR) for predicting daily protein excretion.
• Reviewed recent studies on cardiorenal risk associated with lower albumin excretion levels.
• Incorporated the Canadian Diabetes Association's revised ACR threshold of 2.0 mg/mmol for both men and women.

Main Results:

• The previous upper limit of normal for ACR (30 mg/day) may have been set too high.
• The revised ACR threshold of 2.0 mg/mmol will identify more individuals, especially women, with abnormal albuminuria.
• These identified individuals are at high risk for cardiorenal disease.

Conclusions:

• The updated Canadian Diabetes Association guidelines provide a more sensitive threshold for detecting abnormal albuminuria.
• Early identification of increased cardiorenal risk in people with diabetes is crucial.
• Implementing recommended strategies can effectively reduce cardiorenal risks in this population.