Table 5.

Analysis of hospitalization risk factors in Omicron infection.

Severity		Mild as a reference category
		Coefficients	OR (95%CI)	p-value
Asymptomatic	(Intercept)	0.536	——	0.301
	Fever	-1.767	0.171 (0.063-0.467)	0.001**
	Sore throat	-1.671	0.188 (0.061-0.583)	0.004**
	Anosphrasia	3.128	22.832 (1.905-273.603)	0.014*
	Cough	-1.406	0.245 (0.101-0.596)	0.002**
	Fatigue	-1.228	0.293 (0.076-1.128)	0.074
	Diarrhea	-0.486	0.615 (——)	——
	Basic diseases	-0.741	0.477 (0.183-1.245)	0.13
	Vaccination
	one	1.482	4.402 (0.578-33.514)	0.152
	two	0.065	1.067 (0.352-3.232)	0.909
	three	0.743	2.103 (0.694-6.374)	0.189
Moderate	(Intercept)	-0.274		0.588
	Fever	-0.317	0.728 (0.356-1.489)	0.385
	Sore throat	-1.003	0.367 (0.16-0.84)	0.018*
	Anosphrasia	1.152	3.165 (0.509-19.686)	0.217
	Cough	0.233	1.263 (0.641-2.488)	0.5
	Fatigue	0.694	2.002 (0.843-4.759)	0.116
	Diarrhea	20.136	——	——
	Basic diseases	0.262	1.299 (0.601-2.811)	0.046*
	Vaccination
	one	1.683	5.383 (0.845-34.291)	0.075
	two	-0.277	0.758 (0.26-2.214)	0.613
	three	0.525	1.691 (0.586-4.877)	0.331

Due to the imbalance of disease severity in Omicron infection, the R 4.1.2 analysis software was used to randomly select 90 asymptomatic and mild samples from the asymptomatic and mild patients in the Omicron group, respectively, together with 90 moderate cases, forming a new data set of 270 cases. A disordered multi-category logistic regression model was constructed to analyze the hospitalization risk factors, with the mild samples as a reference category.

*indicates that the p-value of the variable is less than 0.05.

**indicates that the p-value of the variable is less than 0.01.