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  COVID-19 PAWNN Score

 
Input
 
Age  
WBC  
Neutrophil Count  
Lymphocyte Count  
Platelets  

 
Results
 
 
Neut Lymph Ratio  
PAWNN Score  
 
Decimal Precision  

 
     
 
Include literature references: Yes   No

 
  PAWNN Score Interpretation

 
0 to 6 points: Lower risk of death
7 to 12 points: Higher risk of death

 
 
Notes
  • This calculator represents findings from the literature referenced below. It is important to understand that these findings may not be representative of the experience in your local healthcare system.

 
Equations used
 
NeutLymphRatio = NeutrophilCount / LymphocyteCount
PAWNNScore = AgeFactor + NeutLymphRatioFactor + PlatFactor + NeutFactor + WBCFactor

 

 
Calculation Details and Variables
  • AgeFactor is assigned values by this ordered logic:
    • If Age ≥70 yr AgeFactor = 2
    • Else if Age ≥50 yr AgeFactor = 1
    • Else AgeFactor = 0.
  • WBCFactor is assigned values by this ordered logic:
    • If WBC >9.5 x10^3/mcL WBCFactor = 1
    • Else WBCFactor = 0.
  • NeutFactor is assigned values by this ordered logic:
    • If Neutrophil Count >6.3 x10^3/mcL NeutFactor = 1
    • Else NeutFactor = 0.
  • PlatFactor is assigned values by this ordered logic:
    • If Platelets <100 x10^3/mcL PlatFactor = 2
    • Else PlatFactor = 0.
  • The default NeutLymphRatioFactor is 0 points. If the Neut Lymph Ratio >4.06 the NeutLymphRatioFactor is assigned 6 points. Else if the Neut Lymph Ratio ≥2.22 and ≤4.06 the NeutLymphRatioFactor is assigned 2 points.

 
References
  1. Liu H, Chen J, Yang Q, et al. Development and validation of a risk score using complete blood count to predict in-hospital mortality in COVID-19 patients. Med (N Y). 2021 Apr 9;2(4):435-447.e4. PubMed ID: 33521746 PubMed Logo

 
Associated Logical Observation Identifiers Names and Codes [LOINC]
 
Parameter LOINC's and Suggested Units
Age 21612-7 : yr      21612-7 : yr      21612-7 : years      30525-0 : Years old      30525-0 : yr      30525-0 : years      
WBC 6690-2 : #/microL      
Neutrophil Count 26499-4 : 10^3/microL      751-8 : 10^3/microL      753-4 : 10^3/microL      
Lymphocyte Count 731-0 : x10^3/microL      26474-7 : x10^3/microL      732-8 : x10^3/microL      
Platelets 777-3 : x10^9/L      26515-7 : x10(3)/mcL      

 
This material contains content from LOINC® (http://loinc.org). The LOINC table, LOINC codes, and LOINC panels and forms file are copyright © 1995-2014, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and available at no cost under the license at http://loinc.org/terms-of-use.

 
Associated ICD10-CM Codes
 
   U07.1COVID-19
   J12.9Viral pneumonia, unspecified
   J12.89Other viral pneumonia

 
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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.
 
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