Fig. 2

Box and whisker plots comparing TL_CO and K_CO in COVID-19 survivors. TL_CO and K_CO are displayed together to demonstrate how TL_CO is reduced on average, whereas K_CO is generally preserved (ward) or raised (ITU). Indeed, K_CO was significantly higher in ITU patients compared to those treated on the ward (p = 0.03). Patients include those who were treated on ITU (light grey boxes) and those who were treated on the ward alone (dark grey boxes). Boxes represent the IQR with the median line displayed. Whiskers represent 1.5 × IQR to highlight outliers