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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))

 

 
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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