Table 2.

Association between selected symptoms and frequency of at least one positive tests among 1573 healthcare workers tested for SARS-CoV-2 in Milan, Italy, during 24 February 2020 to 31 March 2020

Specific symptom	Workers	Positive test		p	ORa	95% CIa
	N	N	%
Cough
No	1343	84	6.2	<0.001	1.00	Reference
Yes	230	55	23.9	—	1.72	1.05–2.81
Fever
No	1368	61	4.5	<0.001	1.00	Reference
Yes	205	78	38.0	—	9.12	5.61–14.8
Sore throat
No	1422	128	9.0	0.48	1.00	Reference
Yes	151	11	7.3	—	0.30	0.14–0.64
Coryza
No	1462	113	7.7	<0.001	1.00	Reference
Yes	111	26	23.4	—	1.71	0.89–3.30
Headache
No	1485	115	7.7	<0.001	1.00	Reference
Yes	88	24	27.3	—	0.75	0.38–1.48
Myalgias
No	1513	119	7.9	<0.001	1.00	Reference
Yes	60	20	33.3	—	2.15	1.02–4.55
Diarrhoea, nausea, vomiting
No	1524	126	8.3	<0.001	1.00	Reference
Yes	49	13	26.5	—	1.59	0.67–3.79
Asthenia
No	1526	117	7.7	<0.001	1.00	Reference
Yes	47	22	46.8	—	3.72	1.74–7.92
Ocular symptoms
No	1537	126	8.2	<0.001	1.00	Reference
Yes	36	13	36.1	—	2.49	0.90–6.85
Dyspnoea
No	1541	124	8.0	0.001	1.00	Reference
Yes	32	15	46.9	—	5.78	2.39–14.0
Taste and smell alterations
No	1547	119	7.7	<0.001	1.00	Reference
Yes	26	20	76.9	—	51.4	17.6–150

CI, confidence interval; OR, odds ratio; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.

The p values were calculated by chi-square test.

^aFrom a multivariable logistic model including all symptoms.