Table 3.

Risk factors of laboratory-confirmed SARS-CoV-2 infection at inclusion (after imputation of missing data; N = 1017).

	Univariate analysis			Multivariate analysis
	OR	[95% CI]	p value	OR	[95% CI]	p value
Age	0.99	[0.96; 1.02]	0.42	0.98	[0.95; 1.01]	0.26
Women	0.76	[0. 44; 1. 32]	0.33	0.60	[0.30; 1.23]	0.16
Working in a referent hospital for emerging biological risk	1.11	[0.66; 1.87]	0.69	1.08	[0.56; 2.09]	0.83
Working department			< 0.0001			< 0.0001
Emergency department	1			1
Intensive care unit	1.68	[0.64; 4.39]		1.29	[0.47; 3.51]
Infectious diseases department	9.46	[4.18; 21.40]		6.61	[2.64; 16.54]
Professional category			0.08			0.50
Physicians	1			1
Medical students	2.17	[0.92; 5.11]		1.62	[0.42; 6.28]
Care assistants	0.51	[0.19; 1.40]		1.18	[0.38; 3.63]
Nurses	1.20	[0.59; 2.41]		1.86	[0.77; 4.50]
Others	0.89	[0.30; 2.60]		0.78	[0.22; 2.69]
Experience in the department ≥ 2 months	0.71	[0.41; 1.23]	0.22	1.27	[0.49; 3.25]	0.62
Experience in the job ≥ 12 months	1.20	[0.47; 3.07]	0.71	0.94	[0.25; 3.56]	0.92
Night shift	0.61	[0.24; 1.56]	0.30	0.52	[0.12; 2.31]	0.39
Public transportation use	1.11	[0.62; 2.02]	0.65	0.99	[0.51; 1.94]	0.84
Active smoker	0.25	[0.09; 0.70]	0.009	0.28	[0.10; 0.82]	0.02

HCWs from virology department were excluded because none had a positive serology result at inclusion.

Others include (but not limited to): secretaries, nurse’s managers, social workers.

OR odds ratio, CI confidence interval.