Table 4.

Multivariate logistic regression analysis for study of the relationship between different independent variables and the occurrence of SARS-CoV-2 infection after administration of the first vaccine dose in HCWs

	OR	s.e.	z	P > z	95% confidence interval
Positive PCR before vaccination	1.023217	0.166405	0.14	0.888	0.74394	1.407336
Seropositivity before vaccination	0.677493	0.107513	−2.45	0.014	0.496393	0.924666
Age	1.015443	0.022407	0.69	0.487	0.972463	1.060323
BMI	1.014778	0.039902	0.37	0.709	0.939509	1.096077
History of COVID-19 in family	0.90869	0.45406	−0.19	0.848	0.341257	2.419633
Number of household members	0.870272	0.162358	−0.74	0.456	0.603747	1.254456

Significant p values are shown in bold.