Table 1. Seroprevalence of SARS-CoV-2 rapid testing according to sociodemographic characteristics.

Variable	n (328)	%	Rapid Test +	%	OR	CI 95%	P
Age
18–20	78	23.78	43	55.13	0.788	0.466–1.301	0.340
21–40	193	58.84	122	63.21	1.416	0.905–2.216	0.127
41–60	46	14.02	24	52.17	0.697	0.373–1.304	0.259
61–90	11	3.35	7	63.64	1.185	0.340–4.131	0.789
Gender
Female	261	79.57	151	57.85	0.671	0.381–1.182	0.167
Male	67	20.42	45	67.16	1.490	0.846–2.624
Village
Bororó	193	58.84	124	62.24	1.572	1.004–2.462	0.047
Jaguapirú	135	41.15	72	53.33	0.635	0.406–0.995
Ethnicity
Guarani-Kaiowa	217	66.15	135	62.21	1.349	0.848–2.145	0.205
Others	111	33.84	61	54.95	0.741	0.466–1.178
Marital status
Married	230	70.12	132	57.39	0.715	0.437–1.169	0.181
Unmarried	98	29.88	64	65.31	1.397	0.855–2.284
Work outside village
No	266	81.10	157	59.02	0.849	0.480–1.502	0.574
Yes	62	18.90	39	62.90	1.177	0.665–2.082
Familiar monthly incomes (USD)
< 200	153	46.65	88	57.52	0.839	0.539–1.307	0.439
200–488	157	47.87	97	61.78
> 488	18	5.49	11	61.11
Government benefit
Yes	253	77.13	149	58.89	0.853	0.502–1.451	0.558
No	75	22.87	47	62.67	1172	0.689–1.992
Education level
least 4 years of study	45	13.72	29	64.44	1.259	0.654–2.423	0.490
5 to 8 years of study	283	86.28	167	59.01	0.794	0.412–1.528
People living in the house
1 resident	17	5.18	14	82.35	3.307	0.931–11.745	0.06
2 residents	31	9.45	17	54.84	0.8	0.380–1.685	0.586
3 residents	71	21.65	44	61.97	1.125	0.656–1.931	0.667
4 residents	81	24.70	49	60.49	1.041	0.623–1.739	0.876
5 or more residents	129	39.33	72	55.81	0.764	0.486–1.198	0.241
Access to piped water
Yes	297	90.55	176	59.26	0.8	0.369–1.730	0.570
No	31	9.45	20	64.52	1.25	0.578–2.703
COVID-19 information sources
Cell phone	214	65.24	91	42.52	1.317	0.824–2.105	0.249
Others	114	34.76	41	35.96	0.759	0.475–1.213
Other risk behaviors
Vaccinated influenza
Yes	290	88.41	167	57.59	0.421	0.192–0.922	0.030
No	38	11.59	29	76.32	2.373	1.084–5.194
Contact with COVID-19 suspect
Yes	218	66.46	124	56.88	0.696	0.432–1.120	0.135
No	110	33.54	72	65.45	1.436	0.892–2.311

*The proportion used to infer the seroprevalence was proportion of positive results for rapid test. CI Confidence Interval. p < 0.05. Regardless of quantity. (+) Positive results in rapid test. The results compiled in this table represent the volunteers who answered the self-reported questionnaire.