Defining COVID-19 Infection Severity on Presentation to Hospital

In the assessment of severity in coronavirus disease 2019 (COVID-19), the modified Brit_x0002_ish Thoracic Society (mBTS)，CURB65 et al. rules identifies patients with severe pneumonia but not patients who might be suitable for home management. A multicentre prospective study was conducted to derive and validate a practical severity assessment model for stratifying adults hospitalised with COVID-19 into different management groups.

Inclusion Criteria:Patients with novel coronavirus infection meeting the criteria of The New Coronavirus Pneumonia Diagnosis and Treatment Program (Ninth Edition);Participants are willing to participate in this study and follow the research plan;Participants or legally authorized representatives can give written informed consent approved by the Ethics Review Committee that manages the website.Exclusion Criteria:pneumonia was (a) not the primary cause for hospital admission, (b) an expected terminal event,or (c) distal to bronchial obstruction;patients with tuberculosis,bronchiectasis,solid organ and haematological malignancies or human immuno deficiency virus (HIV) infection;patients who had been in hospital within the previous 14days, were immunocompromised,or had previously been entered in the study;nursing home residents.Participation in other clinical study.