Table 4.

Poisson generalized linear models of factors related to adverse events following immunization.

Variable	Log (IRR)	95% CI	p-Value
Gender	−0.59	−0.82, −0.37	<0.001
SARS-CoV-2 infection before vaccination	0.16	−0.01, 0.33	0.059
Antibody titers	0.0000292	0.0000003.00005	0.048

IRR: incidence rate ratio, CI: confidence interval. Poisson generalized linear regression was performed to analyze the factors related to adverse events following immunization. A p-value < 0.05 was considered statistically significant.