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  COVID-19 Simplified HOSPITAL Score for Readmission Risk

Hemoglobin at discharge  
Active Cancer No (0)

Yes (2)
Serum Sodium at Discharge  
Elective Admit Yes (0)

No (1)
Number of admissions in last year  
Length of stay  

Important: Inputs must be complete to perform calculation.

Simplified HOSPITAL Score  

  Simplified HOSPITAL Score Interpretation

0 to 4 points: Potentially avoidable readmission unlikely (6.4% chance)
5 to 12 points: Potentially avoidable readmission likely (17.3% chance)


  Data action

Include literature references: Yes   No

  • 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.

Equations used
SimplifiedHOSPITALScore = Hemoglobin at dischargeFactor + ActiveCancer + SodiumFactor + ElectiveAdmit + NumberAdmitsFactor + Length of stayFactor


Calculation Details and Variables
  • HemoglobinFactor is assigned values by this ordered logic:
    • If Hemoglobin at discharge <12 g/dL, HemoglobinFactor = 1
    • Else HemoglobinFactor = 0.
  • Equation parameters such as Active Cancer, have two or more discrete values that may be used in the calculation. The numbers in the parentheses, e.g. (0), represent the values that will be used.
  • SodiumFactor is assigned values by this ordered logic:
    • If Serum Sodium at Discharge <135 mEq/L, SodiumFactor = 1
    • Else SodiumFactor = 0.
  • NumberAdmitsFactor is assigned values by this ordered logic:
    • If Number of admissions in last year >5 number, NumberAdmitsFactor = 5
    • Else if Number of admissions in last year ≥2 number, NumberAdmitsFactor = 2
    • Else NumberAdmitsFactor = 0.
  • LOSFactor is assigned values by this ordered logic:
    • If Length of stay ≥5 days, LOSFactor = 2
    • Else LOSFactor = 0.

  1. Gavin W, Rager J, Russ J, et al. Accuracy of the Simplified HOSPITAL Score in Predicting COVID-19 Readmissions-Exploring Outcomes from a Hospital-at-Home Program. J Healthc Manag. 2021 Nov 23. PubMed ID: 34816806 PubMed Logo
  2. Aubert CE, Schnipper JL, Williams MV, et al. Simplification of the HOSPITAL score for predicting 30-day readmissions. BMJ Qual Saf. 2017 Oct;26(10):799-805. PubMed ID: 28416652 PubMed Logo

Associated Medical Subject Headings [MeSH]
         80 and over,   Adult,   Aged,   COVID-19,   Female,   Hemoglobins,   Hospitals,   Humans,   International Classification of Diseases,   Male,   Middle Aged,   Neoplasms,   Patient Admission,   Patient Readmission,   Predictive Value of Tests,   Retrospective Studies,   Risk Factors,   SARS-CoV-2,   Sodium

Associated Logical Observation Identifiers Names and Codes [LOINC]
Parameter LOINC's and Suggested Units
Hemoglobin 718-7 : g/dL      718-7 : gm/dL      59260-0 : mmol/L      
Serum Sodium 2951-2 : mmol/L      2947-0 : mEq/L      32340-2 : mEq/L      39791-9 : mEq/L      
LOS 78033-8 : days      

This material contains content from LOINC (http://loinc.org). LOINC is copyright © 1995-2023, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license. LOINC® is a registered United States trademark of Regenstrief Institute, Inc.


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