Table 2.

Multivariate analysis of cross-reactivity between exposure to endemic coronaviruses and SARS-CoV-2 antibody concentration among vaccinated participants.

Model types	Variables	β (95% CI)
Model 1	HCoV-229E Spike	0.17(0.04, 0.30) ***
Model 2	HCoV-HKU1 Spike	0.56(0.44, 0.69) ***
Model 3	HCoV-NL63 Spike	0.18(0.05, 0.32) ***
Model 4	HCoV-OC43 Spike	0.70(0.55, 0.84) ***

Outcome variable: SARS-CoV-2 Anti-spike antibody concentration

Each model was adjusted for age, sex, education, and “days from January to blood collection”, date from 1^st vaccine to blood collection, and date from 2^nd vaccine to blood collection,

***p < 0.05, i.e., variable in the model is significant at (p<0.05).

β (95% CI): Regression coefficients (95% Confidence interval).