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Alternative names, keywords |
albumin:creatinine ratio, ACR, "microalbumin" |
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Samples required |
5 mL plain urine |
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Test indications |
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Factors affecting test performance/ results |
False positives include benign orthostatic proteinuria, symptomatic UTI, and menstrual contamination. Results should always be assessed in conjunction with the patient’s medical history, clinical examination and other findings. |
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Reference range |
< 3 mg/mmol creatinine. An ACR between 3 mg/mmol and 70 mg/mmol should be repeated on an early morning sample to confirm the result. A repeat sample is not needed if the initial ACR is 70 mg/mmol or more. A confirmed ACR of 3 mg/mmol or indicates clinically important proteinuria. KDIGO ACR classification: less than 3 mg/mmol KDIGO ACR category A1 3 - 30mg/mmol, KDIGO ACR category A2 over 30mg/mmol, KDIGO ACR category A3 Source: NICE NG203 Chronic kidney disease: assessment and management. |
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Turnaround time |
Same day (within 2h if urgent) |
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Enquiries |
Biochemistry (Automation) |