Fig. 4.

A Line graph demonstrating the median CT scores of mild and severe patients at various time points after onset of symptoms. Solid line mild patients; dotted line severe patients. B Stacked-bar graph showing the distribution of different patterns of lung changes in mild patients on CT scans at various time points. C Stacked-bar graph showing the distribution of different patterns of lung changes in severe patients on CT scans at various time points. Black color indicates bronchiectasis, dark gray indicates reticular pattern, white indicates consolidation, light gray indicates the ground-glass opacities, and striped indicates normal. The time points in italics were time after hospital discharge (1m, 3m, and 6m indicated 1 month, 3 months, and 6 months after hospital discharge, respectively). The number of patients at each sampling point was listed on the top of the bar