Table 4.

The risk factors for seropositivity: multivariate logistic regression

Factor	Group	OR (95% CI)	P
Gender	Men	1.00
	Women	1.75 (0.93–3.28)	0.082
Smoking	Daily	1.00
	Sometimes	1.83 (0.30–11.15)	0.510
	Never	2.95 (0.91–9.58)	0.072
Close contacts with SARS-CoV-2 positives	No	1.00
	Yes	5.49 (2.51–12.04)	<0.001
	Don’t know	2.31 (0.82–6.56)	0.115