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COVID-19 PAWNN Score

 

Input
 

Age		mo yr
WBC		#/mcL #/microL / nl /mcL /microL 10*3/uL 10*6/uL 10*6/uL 10E+9/L 10^3/microL K/mm3 K/uL Mill/mcl Million/ul Thous/mcL Thousand/uL X10E+09/L X10E+12/L cells/mcL cells/microL m/cmm thou/mcL x10(12)/L x10(3)/mcL x10(3)/microL x10(6)/L x10(6)/mcL x10(6)/microL x10(9)/L x1000/mm3 x10^12/L x10^3/mcL x10^3/microL x10^6/L x10^6/mcL x10^6/microL x10^9/L {cells}/uL
Neutrophil Count		#/mcL #/microL / nl /mcL /microL 10*3/uL 10*6/uL 10*6/uL 10E+9/L 10^3/microL K/mm3 K/uL Mill/mcl Million/ul Thous/mcL Thousand/uL X10E+09/L X10E+12/L cells/mcL cells/microL m/cmm thou/mcL x10(12)/L x10(3)/mcL x10(3)/microL x10(6)/L x10(6)/mcL x10(6)/microL x10(9)/L x1000/mm3 x10^12/L x10^3/mcL x10^3/microL x10^6/L x10^6/mcL x10^6/microL x10^9/L {cells}/uL
Lymphocyte Count		#/mcL #/microL / nl /mcL /microL 10*3/uL 10*6/uL 10*6/uL 10E+9/L 10^3/microL K/mm3 K/uL Mill/mcl Million/ul Thous/mcL Thousand/uL X10E+09/L X10E+12/L cells/mcL cells/microL m/cmm thou/mcL x10(12)/L x10(3)/mcL x10(3)/microL x10(6)/L x10(6)/mcL x10(6)/microL x10(9)/L x1000/mm3 x10^12/L x10^3/mcL x10^3/microL x10^6/L x10^6/mcL x10^6/microL x10^9/L {cells}/uL
Platelets		#/mcL #/microL / nl /mcL /microL 10*3/uL 10*6/uL 10*6/uL 10E+9/L 10^3/microL K/mm3 K/uL Mill/mcl Million/ul Thous/mcL Thousand/uL X10E+09/L X10E+12/L cells/mcL cells/microL m/cmm thou/mcL x10(12)/L x10(3)/mcL x10(3)/microL x10(6)/L x10(6)/mcL x10(6)/microL x10(9)/L x1000/mm3 x10^12/L x10^3/mcL x10^3/microL x10^6/L x10^6/mcL x10^6/microL x10^9/L {cells}/uL

 
Results
 
Important: Inputs must be complete to perform calculation.

 

Neut Lymph Ratio		% fraction percent rate ratio
PAWNN Score		# count index logit none number points score
Decimal Precision   0 1 2 3

 

     
 
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

 

Associated Medical Subject Headings [MeSH]
 

Blood Cell Count,   COVID-19,   Hospital Mortality,   Humans,   Prognosis,   Retrospective Studies,   Risk Factors,   SARS-CoV-2

 

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	751-8 : 10^3/microL      26499-4 : 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.