Table 1.

Characteristics of the overall, SARS-CoV-2 seronegative, and seropositive population

	SARS-CoV-2 seronegative population (n = 211)	SARS-CoV-2 seropositive population (n = 148)
Age (mean years ± SD)	43.4 (±11.5)	42.7 (± 11.1)
Gender
Men	119 (56.4%)	63 (42.6%)
Women	92 (43.6%)	85 (57.4%)
Comorbidities
Cardiovascular history	10 (4.8%)	3 (2.0%)
Respiratory pathology	2 (0.9%)	0
Diabetes	4 (1.9%)	1 (0.7%)
Obesity	2 (0.9%)	4 (2.7%)
Kidney pathology	1 (0.5%)	0
Equipment
FFP2 mask	32 (15.2%)	26 (17.6%)
Surgical mask	92 (43.6%)	73 (49.3%)
Cloth mask	179 (84.8%)	126 (85.1%)
Gloves	132 (62.6%)	91 (61.5%)
Disposable isolation gown	49 (23.2%)	35 (23.6%)
Medical gown	73 (34.6%)	66 (44.6%)
Contact with a confirmed case
Yes	106 (50.2%)	89 (60.1%)
No	105 (49.8%)	59 (39.9%)
Symptoms
Fever	10 (4.7%)	26 (17.6%)
Shivers	9 (4.3%)	24 (16.2%)
Chest pain	10 (4.7%)	11 (7.4%)
Agesia/dysgesia	1 (0.5%)	7 (4.7%)
Anosmia	1 (0.5%)	10 (6.8%)
Dyspnea	1 (0.5%)	1 (0.7%)
Conjunctivitis	1 (0.5%)	1 (0.7%)
Skin rash	0	2 (1.3%)
Headache	24 (11.4%)	37 (25.0%)
Cough	24 (11.4%)	26 (17.6%)
Asthenia	10 (4.8%)	22 (14.9%)
Diarrhea	8 (3.8%)	10 (6.8%)
Rhinorrhea	28 (13.3%)	37 (25.0%)
Myalgia	6 (2.8%)	22 (14.9%)
Altered mental status	2 (0.9%)	0
No symptom	156 (73.9%)	70 (47.3%)
Laboratory confirmation of COVID-19 infection
Positive	1 (0.5%)	22 (14.9%)
Negative	20 (9.5%)	15 (10.1%)
Not done	190 (90.0%)	111 (75.0%)
COVID-19: case definitions
Suspect COVID-19 case*	1 (0.5%)	1 (0.7%)
Probable COVID-19 case†	9 (4.3%)	10 (6.8%)
Confirmed COVID-19 case‡	1 (0.5%)	22 (14.9%)
No COVID-19	200 (94.8%)	115 (77.8%)

^*Defined by having at least three symptoms (fever, cough, general weakness/fatigue, headache, myalgia, sore throat, coryza, dyspnea, anorexia/nausea/vomiting, diarrhea, and altered mental status).

^†Defined by having anosmia or ageusia or suspected COVID-19 case and have had contact with a confirmed case.

^‡Laboratory confirmed case by an antigenic test and/or RT-PCR.