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. 2020 Sep 21;27(12):1665–1678. doi: 10.1016/j.acra.2020.09.004

Table 5.

The Selected Features and the Performance for Classification of Moderate vs (Severe + Critical) (Model I), and Severe vs Critical (Model II)

Model I: Moderate vs (Severe + Critical) Model II: Severe vs Critical
Selected features (radiomics)
  • 1

    HIST_var_residual

  • 2

    %NLLV

  • 3

    HIST_uniformity_residual

  • 4

    HIST_mad_residual

  • 5

    HIST_kurt_residual
  • 1

    %NLLV

  • 2

    NLLV

  • 3

    HIST_quant0.975_residual
Performance (radiomics) AUC 0.828 (0.821-0.834) AUC 0.789 (0.780-0.799)
Specificity 0.703 Specificity 0.662
Sensitivity 0.797 Sensitivity 0.791
Accuracy 0.750 (0.743-0.757) Accuracy 0.726 (0.717-0.735)
Selected features (clinical)
  • 1

    PO2

  • 2

    Eosinophil_ratio

  • 3

    Symptom_to_hospital_time

  • 4

    Blood_oxygen_saturation

  • 5

    Age
  • 1

    Age

  • 2

    Lactate_dehydrogenase

  • 3

    Hypertension

  • 4

    Creatine_kinase_isoenzyme

  • 5

    Serum_creatinine
Performance (clinical) AUC 0.917 (0.913-0.921) AUC 0.917 (0.911-0.922)
Specificity 0.801 Specificity 0.854
Sensitivity 0.877 Sensitivity 0.812
Accuracy 0.839 (0.833-0.845) Accuracy 0.833 (0.826-0.841)
Selected features (hybrid)
  • 1

    PO2

  • 2

    Eosinophil_ratio

  • 3

    Blood_oxygen_saturation

  • 4

    Age

  • 5

    HIST_uniformity_residual
  • 1

    Age

  • 2

    Creatine_kinase_isoenzyme

  • 3

    Hypertension

  • 4

    %NLLV

  • 5

    NLLV
Performance (hybrid) AUC 0.927 (0.922-0.931) AUC 0.929 (0.924-0.934)
Specificity 0.809 Specificity 0.872
Sensitivity 0.901 Sensitivity 0.842
Accuracy 0.855 (0.849-0.860) Accuracy 0.857 (0.850-0.864)

Note: a suffix with “residual” indicates the nonlesion lung.