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Calculator: Estimated 24-hour urine protein excretion in pregnancy (from spot urine protein to creatinine ratio) (conventional and SI units)


Calculator: Estimated 24-hour urine protein excretion in pregnancy (from spot urine protein to creatinine ratio) (conventional and SI units)

 
Input
 
Spot urine protein  
Spot urine creatinine  

 
Results
 
Important: Inputs must be complete to perform calculation.

 
 
Spot urine protein to creatinine ratio   mg/mg
Estimated 24-hour urine protein excretion  
 
Decimal precision  

 
 

 
Notes
  • The American College of Obstetricians and Gynecologists endorses the use of the spot urine protein to creatinine ratio ≥0.3 mg protein/mg creatinine to allow rapid diagnosis of preeclampsia, since the estimated 24-hour urine protein excretion at this level is generally ≥300 mg.[2]
  • A urine protein to creatinine ratio less than 0.15 mg/mg is highly predictive of <300 mg protein in a 24-hour collection, and values above 0.7 mg/mg are highly predictive of >300 mg protein in a 24-hour collection. When time permits and clinically important, ratios between 0.15 and 0.7 mg/mg can be further evaluated by 24-hour urine collection. Please refer to the UpToDate topic on evaluation and management of proteinuria in pregnancy.

 
Equations used
 
Spot urine protein to creatinine ratio = Spot_urine_protein / Spot_urine_creatinine
Estimated 24-hour urine protein excretion = (Spot urine protein to creatinine ratio * 1373.5) - 60.508

 

 
Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

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