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  COVID-19 Quick Severity Index (qCSI)

 
Input
 
Respiratory Rate  
O2 Saturation  
Oxygen Flow Rate  

 
Result
 
 
qCSI  
 
Decimal Precision  

 
     
 
Include literature references: Yes   No

 
  qCSI Interpretation

 
0 to 3 points: 4% risk of critical illness
4 to 6 points: 30% risk of critical illness
7 to 9 points: 44% risk of critical illness
10 to 12 points: 57% risk of critical illness

 
 

 
Equations used
 
qCSI = RRFactor + O2SatFactor + O2FlowFactor

 

 
Calculation Details and Variables
  • RRFactor is assigned values by this ordered logic:
    • If Respiratory Rate >28 breaths/min RRFactor = 2
    • Else if Respiratory Rate ≥23 breaths/min RRFactor = 1
    • Else RRFactor = 0.
  • O2SatFactor is assigned values by this ordered logic:
    • If O2 Saturation ≤88 % O2SatFactor = 5
    • Else if O2 Saturation ≤92 % O2SatFactor = 2
    • Else O2SatFactor = 0.
  • O2FlowFactor is assigned values by this ordered logic:
    • If Oxygen Flow Rate ≤2 L/min O2FlowFactor = 0
    • Else if Oxygen Flow Rate ≤4 L/min O2FlowFactor = 4
    • Else O2FlowFactor = 5.

 
References
  1. Haimovich AD, Ravindra NG, Stoytchev S, et al. Development and Validation of the Quick COVID-19 Severity Index: A Prognostic Tool for Early Clinical Decompensation. Ann Emerg Med. 2020 Oct;76(4):442-453. PubMed ID: 33012378 PubMed Logo

 
Associated Medical Subject Headings [MeSH]
 
         Adolescent,   Adult,   Aged,   Betacoronavirus,   COVID-19,   COVID-19 Testing,   Clinical Laboratory Techniques,   Coronavirus Infections,   Emergency Service,   Female,   Hospital,   Humans,   Male,   Middle Aged,   Oxygen Inhalation Therapy,   Pandemics,   Pneumonia,   Respiratory Insufficiency,   Retrospective Studies,   Risk Assessment,   SARS-CoV-2,   Severity of Illness Index,   Viral,   Young Adult

 
Associated Logical Observation Identifiers Names and Codes [LOINC]
 
Parameter LOINC's and Suggested Units
Respiratory Rate 9303-9 : breaths/min      9279-1 : breaths/min      76170-0 : breaths/min      19840-8 : breaths/min      
O2 Saturation 2708-6 : %      2713-6 : %      51733-4 : %      59408-5 : %      

 
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.

 
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