Table 1 Population seroprevalence of SARS-CoV-2 and sociodemographic variables, Chile 2020
Participants (n) | Seropositive (n) | Seroprevalencea % (95% CI) | OR (95% CI) | |
|---|---|---|---|---|
Overall | 2493 | 242 | 10.4 (7.8–13.7) | – |
City: | ||||
-Coquimbo- La Serena | 478 | 30 | 5.6 (3.3–9.5) | 2.91 (1.01–8.44) |
-Santiago | 1441 | 200 | 11.0 (8.2–14.7) | 6.1 (2.3–15.8) |
-Talca | 574 | 12 | 2.0 (0.8–4.7) | Ref |
Sex: | ||||
-Male | 990 | 107 | 12.2 (8.3–17.5) | 1.5 (0.9–2.4) |
-Female | 1503 | 135 | 8.7 (6.2–12.0) | Ref |
Age Group: | ||||
-7–14 | 176 | 21 | 12.5 (6.1–23.8) | Ref |
-15–24 | 360 | 38 | 9.0 (5.2–15.3) | 0.70 (0.26–1.86) |
-25–39 | 649 | 62 | 10.4 (6.5–16.2) | 0.81 (0.32–2.04) |
-40–59 | 813 | 93 | 12.1 (7.8–18.3) | 0.97 (0.42–2.22) |
-≥ 60 | 495 | 28 | 6.7 (3.4–12.9) | 0.50 (0.18–1.41) |
Nationality: | ||||
-Chilean | 2378 | 221 | 9.3 (7.1–12.1) | Ref |
-Foreign | 115 | 21 | 21.6 (9.1–43.2) | 2.69 (0.96–7.56) |
Native South American Ethnicity:b | ||||
-Yes | 230 | 23 | 17.8 (7.0–38.6) | 2.0 (0.66–6.03) |
-No | 2263 | 219 | 9.7 (7.3–13.0) | Ref |
Educational level (for participants > 17 years old) (n = 2234): | ||||
-None or primary | 234 | 11 | 4.3 (1.6–11.2) | 0.63 (0.19–2.09) |
-Secondary | 1130 | 130 | 14.2 (10.0–19.8) | 2.30 (1.16–4.54) |
-Technical | 330 | 38 | 9.5 (5.1–17.0) | 1.46 (0.59–3.57) |
-University | 540 | 36 | 6.7 (3.7–11.9) | Ref |
Health Insurance (n = 2347): | ||||
-Public | 1811 | 192 | 12.7 (9.3–17.2) | 2.5 (1.25–5.10) |
-Private | 536 | 44 | 5.5 (2.9–9.9) | Ref |
Overcrowding (n = 2487): | ||||
-No | 2338 | 219 | 10.7 (7.9–14.2) | Ref |
-Yes | 149 | 23 | 7.5 (2.9–18.1) | 0.68 (0.24–1.96) |
Number of residents: | ||||
-< 5 | 1651 | 9.3 | 6.2–13.8 | Ref |
-≥ 5 | 842 | 12.8 | 8.9–18.2 | 1.43 (0.79–2.62) |
Type of dwelling (n = 2486): | ||||
-House | 2142 | 201 | 10.3 (7.7–13.6) | Ref |
-Apartment | 344 | 38 | 10.5 (6.1–17.5) | 1.02 (0.52–2.02) |
Heating Fuel (2486) Gas: | ||||
-No | 1315 | 120 | 9.4 (6.6–13.2) | Ref |
-Yes | 1178 | 122 | 11.4 (7.4–17.2) | 1.24 (0.67–2.30) |
Kerosene: | ||||
-No | 1907 | 181 | 10.5 (7.4–14.5) | Ref |
-Yes | 586 | 61 | 10.2 (6.0–16.7) | 0.97 (0.49–1.92) |
Firewood: | ||||
-No | 2175 | 229 | 10.5 (7.8–13.9) | Ref |
-Yes | 318 | 13 | 7.1 (3.4–14.5) | 0.66 (0.28–1.54) |
Electricity: | ||||
-No | 1647 | 159 | 11.5 (7.9–16.4) | Ref |
-Yes | 846 | 83 | 8.7 (5.6–13.2) | 0.73 (0.39–1.36) |