Fig. 5From: Nomogram to identify severe coronavirus disease 2019 (COVID-19) based on initial clinical and CT characteristics: a multi-center studyThe nomogram was constructed to predict the risk of severe COVID-19 based on 4 independent risk factors. For binary variables, 0 = no and 1 = yes. For density category, 1 = GGO, 2 = GGO with consolidation, and 3 = consolidation. Abbreviations: GGO: ground glass opacity; COVID-19 = coronavirus disease 2019Back to article page