Table 3 Conventional logistic model using data of the training cohort: RMPP-3

Age (years)

1.046

(0.985, 1.110)

0.140

Sex (female: male)

1.345

(0.922, 1.955)

0.125

WBC × 10³/µL

1.000

(1.000, 1.000)

< 0.001

Neutrophils (%)

1.024

(1.009, 1.039)

0.002

Absolute neutrophil count × 10³/µL

1.000

(1.000, 1.000)

0.018

Lymphocytes (%)

0.972

(0.955, 0.990)

0.002

Absolute lymphocyte count × 10³/µL

0.999

(0.999, 1.000)

< 0.001

Hemoglobin (g/dL)

0.946

(0.772, 1.159)

0.590

Platelets × 10³/µL

0.991

(0.989, 0.994)

< 0.001

0.991

(0.988, 0.994)

ESR (mm/hr)

1.007

(0.997, 1.017)

0.179

CRP (mg/L)

1.019

(1.013, 1.026)

< 0.001

1.014

(1.008, 1.021)

Procalcitonin (ng/mL)

0.973

(0.845, 1.120)

0.700

LDH (IU/L)

1.004

(1.002, 1.007)

< 0.001

1.006

(1.003, 1.009)

AST (IU/L)

1.006

(0.998, 1.013)

0.126

ALT (IU/L)

0.999

(0.995, 1.003)

0.563

Concurrent respiratory virus

1.444

(0.919, 2.270)

0.111

Oxygen requirement

0.766

(0.247, 2.379)

0.645

Radiologic grouping

< 0.001

 Group 1

–

–

–

 Group 2

2.786

(1.451, 5.352)

0.002

2.408

(1.209, 4.796)

 Group 3

10.385

(5.379, 20.049)

< 0.001

8.080

(4.005, 16.302)

 Group 4

91.385

(10.899, 766.257)

< 0.001

11.827

(1.181, 118.493)

Pleural effusion

4.191

(2.325, 7.552)

< 0.001