Table 3.

Risk factors for COVID-19 in healthcare workers, according to bivariate and multivariate logistic regression.

Variables	Bivariate logistic regression		Multivariate logistic regression
	OR (95 % CI)	P value	OR (95 % CI)	P value
Non-COVID hospital	ref.		ref.
Emergency hospital	0.64 (0.47–0.88)	0.006	0.87 (0.56–1.35)	0.540
COVID-hospital	1.79 (1.31–2.45)	<0.001	1.78 (1.16–2.78)	0.009
Gender
Male Female	ref. 1.246 (0.93–1.67)	0.137
Age	1.00 (0.99–1.01)	0.659
Occupation
Physicians	1.34 (0.94–1.90)	0.109	1.62 (1.05–2.62)	0.048
Nurses	1.03 (0.76–1.40)	0.863	0.85 (0.54–1.32)	0.465
Other	ref.		ref.
Risk
High risk	1.34 (0.92–1.94)	0.123
Medium risk	1.05 (0.74–1.48)	0.777
Low risk	ref.
Years of service	0.99 (0.98–1.01)	0.461
Contact with COVID-19 positive person	1.79 (1.33–2.40)	<0.001
Had symptoms	1.15 (0.86–1.53)	0.344
Symptoms
Fever >38°	5.64 (3.54–8.98)	<0.001	2.95 (1.63–5.34)	0.001
Chills	2.47 (1.80–3.38)	<0.001
Fatigue	1.54 (1.18–1.99)	0.001
Sore throat	1.45 (1.07–1.96)	0.017
Cough	1.64 (1.22–2.20)	0.001
Rhinorrhea	1.22 (0.92–1.62)	0.166
Shortness of breath	2.53 (1.83–3.50)	<0.001	1.91 (1.22–2.99)	0.005
Wheezing	1.87 (1.22–2.87)	0.004
Chest pain	2.20 (1.57–3.08)	<0.001
Headache	1.18 (0.91–1.53)	0.209
Nausea/vomiting	1.47 (1.02–2.12)	0.043
Abdominal pain	1.76 (1.25–2.47)	0.001
Diarrhea	1.26 (0.90–1.76)	0.172
Anosmia and/or ageusia	9.69 (6.30–14.89)	<0.001	4.88 (2.82–8.44)	<0.001
Unusual skin changes	1.79 (1.01–3.18)	0.046
Do you think that the hospital where you work has a sufficient level of protection against COVID-19?
No	ref.
Yes	1.54 (1.03–2.32)	0.037
I don’t know	1.47 (0.88–2.46)	0.139
Which type of mask provides adequate protection during your work in the hospital?
Medical	ref.
FFP2/N95/KN95	1.18 (0.84–1.66)	0.345
None	0.96 (0.55–1.78)	0.963
Do you consider that you have had adequate on-the-job training on protection measures against COVID-19?
No	ref.
Yes	1.26 (0.91–1.75)	0.163
I don’t know	1.00 (0.63–1.58)	0.992