Table 3.

Percent asymptomatic and mean number of symptoms in subjects positive and negative for antibodies against SARS-CoV-2, according to sociodemographic characteristics.

	Positive individuals (N = 849)				Negative individuals (N = 31,867)
	% asymptomatic	Mean number of symptoms	95% CI		% asymptomatic	Mean number of symptoms	95% CI
Sex
Male	13.5	3.6	3.3	3.9	48.8	1.2	1.2	1.3
Female	11.1	4.1	3.9	4.4	37.5	1.7	1.7	1.8
Skin colour
White	12.4	3.7	3.2	4.1	44.3	1.4	1.3	1.4
Brown	10.2	4.1	3.9	4.4	40.7	1.7	1.6	1.7
Black	15.6	3.7	3.2	4.2	42.6	1.5	1.5	1.6
Yellow	14.8	3.7	2.6	4.7	37.4	1.7	1.5	1.8
Indigenous	22.2	3.3	2.2	4.3	38.1	1.7	1.5	2.0
Age
1 to 4	27.6	2.4	1.5	3.3	50.3	1.1	0.9	1.2
5 to 9	21.7	2.4	1.7	3.2	52.3	1.1	1.0	1.2
10 to 19	5.7	3.1	2.5	3.7	36.9	1.6	1.5	1.7
20 to 29	8.3	4.1	3.6	4.6	33.1	1.9	1.8	2.0
30 to 39	6.7	4.9	4.5	5.4	38.3	1.8	1.7	1.9
40 to 49	13.9	4.3	3.8	4.7	41.3	1.7	1.6	1.7
50 to 59	15.0	3.8	3.4	4.3	44.9	1.4	1.4	1.5
60 to 69	12.0	3.5	3.0	4.0	50.5	1.2	1.1	1.2
70 or more	15.9	3.2	2.6	3.8	48.8	1.1	1.1	1.2
Wealth index
Poorest	13.5	3.8	3.5	4.2	43.4	1.6	1.5	1.6
2nd	13.2	3.9	3.5	4.3	41.2	1.6	1.5	1.7
3rd	11.4	4.0	3.6	4.5	42.2	1.6	1.5	1.6
4th	13.2	3.8	3.4	4.3	41.0	1.5	1.5	1.6
Richest	5.0	4.1	3.6	4.7	43.0	1.4	1.3	1.4
Schooling
Primary or less	14.3	3.6	3.3	3.9	45.0	1.4	1.4	1.5
Secondary	8.9	4.3	4.0	4.6	39.8	1.7	1.6	1.7
University or higher	7.8	4.4	3.9	5.0	38.7	1.6	1.6	1.7

The EPICOVID-19 study, third wave.