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Table 3 Validity of different parameters in relation to the clinical grouping (mild vs moderate and severe)

From: COVID-19 disease: CT Pneumonia Analysis prototype by using artificial intelligence, predicting the disease severity

Parameters AUC Cutoff Sensitivity (%) Specificity (%)
Total severity score 0.947 7.50 90.9 87.5
Total score for crazy-paving and consolidation 0.979 5.50 93.2 87.5
Total opacity score 0.920 8.50 84.1 81.2
LAV 0.709 − 573.71 75.0 68.7
HAV 0.729 − 392.53 81.8 62.5
Percentage of opacity 0.908 23.81 86.0 81.2
Percentage of high opacity 0.947 5.61 90.9 81.2
No. of segments affected 0.810 12.50 79.5 43.7
Mean HU total (MLD) 0.876 − 637.70 81.8 81.9
Lung volume 0.723 3135.20 77.3 56.2
  1. HAV high attenuation value, LAV low attenuation value, MLD mean lung density