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. 2022 May 18;24(5):e37931. doi: 10.2196/37931

Table 2.

Summary of the chart review criteria developed by the 4CEa subgroup of physicians, medical informaticians, and data scientists.

Chart-reviewed classification Criteria
Admitted specifically for COVID-19 Symptoms on admission were attributable to COVID-19, and clinicians admitted patients for COVID-19-related care. The symptoms included:

  • Respiratory insufficiency

  • Blood clots in vital organs

  • Hemodynamic changes

  • Other common viral symptoms, such as cough and fever

  • Admitted for non-COVID-19 issue but developed any of the above symptoms while hospitalized
Admitted incidentally with COVID-19 The admission history was unlikely to be related to COVID-19, and clinicians did not specifically admit the patient for COVID-19-related care. This admission could be due to:

  • Trauma

  • Procedure or operation requiring hospitalization

  • Term labor

  • Alternative causes, including drug overdose, cancer progression, and nonrespiratory severe infection
Uncertain Symptoms on admission may have been related to COVID-19, and clinicians considered COVID-19 exacerbation during hospitalization. The symptoms included:

  • Preterm labor

  • Liver dysfunction

  • Graft failure

  • Immune system dysfunction

  • Alternative causes, including sickle cell crisis, failure to thrive, and altered mental status

a4CE: Consortium for Clinical Characterization of COVID-19 by EHRb.

bEHR: electronic health record.