Calculator: Aspartate aminotransferase (AST) to platelet ratio index (APRI) in adults (conventional units)*

Calculator: Aspartate aminotransferase (AST) to platelet ratio index (APRI) in adults (conventional units)^*

Input

Platelets
AST		Units/L
Top normal AST		Units/L

Result

Important: Inputs must be complete to perform calculation.


APRI		index

Decimal precision

APRI interpretation

APRI ≤0.3:	Unlikely cirrhosis or significant fibrosis
APRI >0.3 and ≤0.5:	Unlikely cirrhosis, significant fibrosis possible
APRI >0.5 and ≤1.5:	Significant fibrosis or cirrhosis possible
APRI >1.5 and ≤2:	Likely significant fibrosis, cirrhosis possible
APRI >2:	Likely cirrhosis

Notes

Platelets is the platelet count.
The normal reference range for Platelets is approximately 150000 to 400000/microL (conventional units) [150 to 400 X 10⁹/L (SI units)].
* This calculator uses conventional units (also known as US units and gravimetric units) as the default for inputs. Do not use this calculator if you are using SI units (Système international d'unités); please refer instead to the SI units version of this calculator.

Equations used

APRI = 100 * ((AST/Top normal AST)/(Platelets/1000))

References

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.

All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER. Click here for full notice and disclaimer.

Topic 101830 Version 8.0

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Calculator: Aspartate aminotransferase (AST) to platelet ratio index (APRI) in adults (conventional units)*