A first morning urine albumin is 109 mg/dL and creatinine is 410 mg/dL. Which value is the albumin:creatinine ratio?

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Multiple Choice

A first morning urine albumin is 109 mg/dL and creatinine is 410 mg/dL. Which value is the albumin:creatinine ratio?

Explanation:
Albumin-to-creatinine ratio (ACR) normalizes urine albumin to the concentration of creatinine, giving a mg of albumin per g of creatinine (mg/g). To compute from mg/dL, convert to a consistent unit set. Convert to mg/L by multiplying by 10: 109 mg/dL becomes 1090 mg/L. Do the same for creatinine: 410 mg/dL becomes 4100 mg/L, which is 4.1 g/L. Now divide the albumin concentration by the creatinine concentration in g/L: 1090 mg/L ÷ 4.1 g/L = 1090 ÷ 4.1 ≈ 266 mg/g. This value indicates albuminuria well above normal (normal is <30 mg/g) and falls in the microalbuminuria range (roughly 30–300 mg/g).

Albumin-to-creatinine ratio (ACR) normalizes urine albumin to the concentration of creatinine, giving a mg of albumin per g of creatinine (mg/g). To compute from mg/dL, convert to a consistent unit set. Convert to mg/L by multiplying by 10: 109 mg/dL becomes 1090 mg/L. Do the same for creatinine: 410 mg/dL becomes 4100 mg/L, which is 4.1 g/L. Now divide the albumin concentration by the creatinine concentration in g/L: 1090 mg/L ÷ 4.1 g/L = 1090 ÷ 4.1 ≈ 266 mg/g. This value indicates albuminuria well above normal (normal is <30 mg/g) and falls in the microalbuminuria range (roughly 30–300 mg/g).

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