Table 2.

Linear regression of the factors influencing NAb levels in the whole participants.

	Univariate regression analysis				Multi-factor regression analysis
	Unstandardized Coefficient		Standardized Coefficient	p value	Unstandardized Coefficient		Standardized Coefficient	p value
All participants	B	Standard error	β		B	Standard error	β
Status of infection
Breakthrough cases	2.690	0.128	0.541	<0.0001	2.264	0.176	0.455	<0.001
Post-immunized group	Reference				Reference
Sex
Male	0.764	0.147	0.157	<0.0001	-0.056	0.133	-0.011	0.674
Female	Reference				Reference
Age (years)
>70	-2.532	0.409	-0.263	<0.0001	-0.461	0.371	-0.048	0.214
60-70	-2.431	0.351	-0.370	<0.0001	-0.551	0.318	-0.084	0.083
50-60	-2.028	0.346	-0.324	<0.0001	-0.880	0.305	-0.140	0.004
40-50	-1.754	0.334	-0.318	<0.0001	-0.592	0.294	-0.107	0.044
30-40	-2.653	0.345	-0.427	<0.0001	-0.684	0.314	-0.110	0.030
20-30	-2.108	0.369	-0.278	<0.0001	-0.547	0.328	-0.072	0.096
<20	Reference				Reference
Booster vaccination
Yes	2.552	0.171	0.414	<0.0001	0.775	0.202	.126	<0.0001
No	Reference				Reference