Table 4 Results of RbR model to analyze effective clinical factors on severity of COVID-19 patients

Constant

0.252632

0.140872

1.793350

0.0751

X12

0.386337

0.194240

1.988966

0.0487

X13

0.651536

0.187129

3.481747

0.0007

X18

0.456707

0.160788

2.840435

0.0052

X21

\(-0.422841\)

0.142370

\(-2.970020\)

0.0035

X23

0.719013

0.172711

4.163093

0.0001

X25

\(-0.693047\)

0.147318

\(-4.704420\)

0.0000

X36

0.466564

0.169386

2.754448

0.0067

\({R^2}\) =0.676711, and adjusted \({R^2}\) = 0.660431