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Table 2 Quantitative parameters at different clinical groups

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

Parameters Clinical score P value Post hoc
A (n = 32), mean ± SD B (n = 56), mean ± SD C (n = 32), mean ± SD
Total opacity score 5.81 ± 2.64 10.92 ± 3.77 17.00 ± 2.59 < 0.001 P1 < 0.001
P2 < 0.001
P3 < 0.001
Lung volume 3512.89 ± 1165 2874.89 ± 873.80 2257.30 ± 608.25 < 0.001 P1 0.028
P2 < 0.001
P3 0.001
LAV − 611.34 ± 156.72 − 538.67 ± 80.33 − 483.62 ± 74.87 < 0.001 P1 0.056
P2 < 0.001
P3 0.006
HAV − 396.44 ± 183.77 − 311.10 ± 89.04 − 260.98 ± 67.69 < 0.001 P1 0.053
P2 0.012
P3 < 0.001
Percentage of opacity 14.73 ± 12.83 40.51 ± 21.19 73.75 ± 15.75 < 0.001 P1 < 0.001
P2 < 0.001
P3 < 0.001
Volume of opacity 460.38 ± 331.83 1079.76 ± 469.84 1681.01 ± 562.28 < 0.001 P1 < 0.001
P2 < 0.001
P3 < 0.001
Volume of high opacity 98.40 ± 79.74 314.84 ± 124.39 564.70 ± 192.39 < 0.001 P1 < 0.001
P2 < 0.001
P3 < 0.001
Percentage of high opacity 3.30 ± 3.14 12.32 ± 7.47 25.52 ± 7.50 < 0.001 P1 < 0.001
P2 < 0.001
P3 < 0.001
Mean HU total (MLD) − 710.59 ± 91.50 − 593.10 ± 93.75 − 435.77 ± 88.19 < 0.001 P1 < 0.001
P2 < 0.001
P3 < 0.001
Mean HU of opacity − 489.42 ± 120.72 − 386.66 ± 86.71 − 352.08 ± 60.09 < 0.001 P1 < 0.001
P2 < 0.001
P3 0.089
  1. P1 mild vs moderate, P2 mild vs severe, P3 moderate vs severe, HAV high attenuation value, LAV low attenuation value, MLD mean lung density