In this study, we developed a risk score and web-based calculator to estimate the risk of developing critical illness among patients with COVID-19 based on 10 variables commonly measured on admission to the hospital.

Estimating the risk of critical illness could help identify patients who are and are not likely to develop critical illness, thus supporting appropriate treatment and optimizing the use of medical resources.

In this study with a development cohort of 1,590 patients and a validation cohort of 710 patients, a risk score was developed and validated to predict development of critical illness.

The COVID risk score may help identify patients with COVID-19 who may subsequently develop critical illness.

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