The Prediction Model of Risk Factors for COVID-19 Developing into Severe Illness Based on 1046 Patients with COVID-19

Table 4

Influencing factors for COVID-19 patients to develop severe illnesses in classification analysis.

		B	Standard error	Wald	Degree of freedom	Significance	Exp (B)	95% CI of Exp (B)
								Lower limit	Upper limit
Step 1^a	Age	0.109	0.012	89.053	1	<0.001	1.115	1.090	1.141
	Complications	0.710	0.275	6.662	1	0.010	2.034	1.186	3.488
	Underlying diseases	0.485	0.194	6.265	1	0.012	1.623	1.111	2.373
	Number of symptoms	0.791	0.183	18.755	1	<0.001	2.206	1.542	3.155
	Constant	−8.818	0.720	150.063	1	<0.001	<0.001

Regression equation: .