Table 3.

Logistic regression with seroprevalence as dependent variable and exposure risks (composed of their job function and answer of the respondent) as independent variable

		95% CI
Symptoms in relation to seroprevalence	OR	Lower	Upper	Adjusted P value
Risk group
Intermediate-risk group vs. low-risk group	1.745	1.193	2.550	0.004
High-risk group vs. intermediate-risk group	1.854	1.317	2.610	<0.001
Contact inside university hospital
Contact with protection vs. no contact	2.579	1.809	3.677	<0.001
Contact without protection vs. contact with protection	1.319	0.924	1.884	0.127
Contact outside university hospital
Contact with protection vs. no contact	3.004	1.685	5.355	<0.001
Contact without protection vs. contact with protection	1.436	0.733	2.811	0.292
Interaction between contact inside and outside university hospital
Contact inside, but no contact outside vs. no contact (both inside and outside)	3.242	2.192	4.795	<0.001
No contact inside, but contact outside vs. no contact (both inside and outside)	6.443	3.362	12.348	<0.001
Contact (both inside and outside) vs. no contact (both inside and outside)	9.250	5.547	15.424	<0.001