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

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

Input

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

Equations used

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

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 123055 Version 7.0

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