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Table 1 The classification of severity of COVID-19 was based on the “The Diagnosis and Treatment Consensus of New Coronavirus Pneumonia ,Version 5th-7th”

From: Angiotensin-converting enzyme inhibitors (ACEI) or angiotensin receptor blockers (ARBs) may be safe for COVID-19 patients

Classification in this study Classification by Chinese consensus Description
Mild Mild With mild clinical symptoms, and there is no imaging finding of pneumonia.
Common With fever, respiratory symptoms, and imaging findings of pneumonia
Severe Severe Meet any of the following conditions:
1.Respiratory distress, RR ≥ 30 BPM
2.In resting state, finger pulse oxygen saturation ≤ 93%
3.arterial partial pressure of oxygen (PaO2)/inspired oxygen concentration (FiO2) ≤ 300 mmHg
Critical Critical Meet any of the following conditions:
1.Respiratory failure occurs and requires mechanical ventilation.
2.Shock.
3.With other organ failure and requires ICU monitoring and treatment