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COVID-19 CHOD Score for Estimating Risk of Inpatient Pulmonary Embolism

 

Input
 

CRP		mg/L mg/dL nmol/L
Heart Rate		beats/min bpm
O2Sat		% fraction percent rate ratio
D Dimer		mcg(DDU)/L mcg(DDU)/mL mcg(FEU)/L mcg(FEU)/mL mcg/mL mg(DDU)/L mg(FEU)/L mg/L ng(DDU)/mL ng(FEU)/mL

 
Result
 
Important: Inputs must be complete to perform calculation.

 

CHOD Score		# count index logit none number points score

 

     
 
Include literature references: Yes   No

 

CHOD Score and Risk of Pulmonary Embolism

 

0 to 2 points:	Low risk (4.5% incidence)
3 to 5 points:	Moderate risk (36.8% incidence)
6 to 7 points:	High risk (100% incidence)

 

 

 

Notes

• In this calculator, mcg is the abbreviation for micrograms.
• 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.
• In this study^[1] D-dimer was measured by the HemosIL® D-dimer HS500 system.

 
Equations used
 

CHODScore = CRPFactor + HRFactor + O2SatFactor + DDimerFactor

 

 

Calculation Details and Variables

• CRPFactor is assigned values by this ordered logic:
  • If CRP ≥50 mg/L CRPFactor = 1
  • Else CRPFactor = 0.
• HRFactor is assigned values by this ordered logic:
  • If Heart Rate ≥90 beats/min HRFactor = 2
  • Else HRFactor = 0.
• O2SatFactor is assigned values by this ordered logic:
  • If O2Sat ≤92 % O2SatFactor = 2
  • Else O2SatFactor = 0.
• DDimerFactor is assigned values by this ordered logic:
  • If D Dimer ≥956 ng(FEU)/mL DDimerFactor = 2
  • Else DDimerFactor = 0.

 

References

1. Garcia-Ortega A, Oscullo G, Calvillo P, et al. Incidence, risk factors, and thrombotic load of pulmonary embolism in patients hospitalized for COVID-19 infection. J Infect. 2021 Feb;82(2):261-269. PubMed ID: 33440207
2. Rindi LV, Al Moghazi S, Donno DR, et al. Predictive scores for the diagnosis of Pulmonary Embolism in COVID-19: A systematic review. Int J Infect Dis. 2021 Nov 27;115:93-100. PubMed ID: 34848375

 

Associated Medical Subject Headings [MeSH]
 

Adult,   Aged,   Anticoagulants,   COVID-19,   COVID-19 Testing,   Female,   Fibrin Fibrinogen Degradation Products,   Hospitalization,   Humans,   Incidence,   Male,   Middle Aged,   Pandemics,   Predictive Value of Tests,   Prospective Studies,   Pulmonary Embolism,   Retrospective Studies,   Risk Factors,   SARS-CoV-2,   Spain,   Venous Thromboembolism

 

Associated Logical Observation Identifiers Names and Codes [LOINC]
 

Parameter	LOINC's and Suggested Units
CRP	1988-5 : mg/L      48421-2 : mg/L      76485-2 : nmol/L
Heart Rate	8867-4 : beats/min      8893-0 : beats/min      8890-6 : beats/min      8889-8 : beats/min      68999-2 : beats/min      76282-3 : beats/min      69000-8 : beats/min      69001-6 : beats/min
O2Sat	2708-6 : %      2713-6 : %      51733-4 : %      59408-5 : %
D Dimer	48065-7 : mcg/mL      71427-9 : mcg/mL

 
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.