Table 2 Seroprevalence of SARS-CoV-2 in subgroups of participants.
From: Seroprevalence of SARS-CoV-2 antibodies in Saint Petersburg, Russia: a population-based study
CMIA | ELISA | |||||
|---|---|---|---|---|---|---|
Number of participants | Seroprevalence (95% CI) | Number of participants | Seroprevalence (95% CI) | |||
Interviewed | Tested | Interviewed | Tested | |||
Overall | 5953 | 990 | 7.4% (5.7–9.2) | 5951 | 988 | 9.1% (7.2–10.9) |
Age groups | ||||||
18–34 | 2228 | 388 | 7.8% (5.2–10.5) | 2227 | 387 | 11.3% (8.1–14.4) |
35–49 | 1916 | 342 | 6.5% (4.0–9.0) | 1915 | 341 | 7.4% (4.8–10.1) |
50–64 | 1159 | 199 | 10% (6.0–14.0) | 1159 | 199 | 10.8% (6.6–15.0) |
65+ | 650 | 61 | 4.1% (0.0–8.8) | 650 | 61 | 3.1% (0.0–7.2) |
Sex | ||||||
Female | 3505 | 623 | 7.5% (5.5–9.6) | 3505 | 623 | 8.7% (6.5–10.9) |
Male | 2448 | 367 | 7.3% (4.6–9.9) | 2446 | 365 | 9.5% (6.6–12.5) |
Higher education | ||||||
No | 1928 | 169 | 7.4% (3.8–10.9) | 1927 | 168 | 9.7% (5.7–13.7) |
Yes | 4025 | 821 | 7.5% (5.7–9.3) | 4024 | 820 | 8.7% (6.8–10.6) |
Higher income | ||||||
No | 3402 | 491 | 6.6% (4.4–8.8) | 3402 | 491 | 8.6% (6.2–11) |
Yes | 2551 | 499 | 8.5% (6.1–11.0) | 2549 | 497 | 9.7% (7.1–12.3) |
Respondent lives alone | ||||||
No | 4857 | 805 | 8.0% (6.0–9.9) | 4855 | 803 | 9.8% (7.7–12.0) |
Yes | 1096 | 185 | 5.1% (2.0–8.1) | 1096 | 185 | 5.5% (2.5–8.6) |
History of illness in the last 3 months | ||||||
No | 4047 | 548 | 3.8% (2.1–5.5) | 4046 | 547 | 5.0% (3.1–7.0) |
Yes | 1906 | 442 | 15.1% (11.6–18.6) | 1905 | 441 | 17.6% (13.9–21.3) |
History of COVID-19 testing | ||||||
No | 5038 | 762 | 5.4% (3.7–7.1) | 5036 | 760 | 7.2% (5.2–9.1) |
Yes | 915 | 228 | 18.6% (13.6–23.6) | 915 | 228 | 19.4% (14.4–24.5) |
Change in hand washing habits during pandemic | ||||||
No | 2029 | 279 | 9.6% (6.3–12.9) | 2029 | 279 | 11.8% (8.2–15.4) |
Yes | 3924 | 711 | 6.3% (4.5–8.1) | 3922 | 709 | 7.6% (5.7–9.6) |
