Fig. 2

Evaluating timing, oxygenation, and imaging criteria of Berlin definition. Panel A shows the frequency distribution of when patients meet oxygenation and imaging criteria. Panel B shows the marginal probability of hospital mortality by level of oxygen support. NC = nasal cannula (or other low flow oxygen); HF = high-flow oxygen; MV = mechanical ventilation (invasive or non-invasive). Panel C shows the marginal probability of hospital mortality by degree of parenchymal opacities on chest radiographs, determined by natural language processing of imaging reports. For Panels B and C: brackets indicate group-wise differences in logistic regression models. *** P < 0.001 ns = not significant