Volume 28, Number 2—February 2022
Research Letter
Seroprevalence of SARS-Cov-2 Antibodies in Adults, Arkhangelsk, Russia
Table
Characteristic | Unvaccinated |
Vaccinated* |
Total |
|||||
---|---|---|---|---|---|---|---|---|
No. seropositive/total (%) | Adjusted seroprevalence, % (95% CI)† | No. seropositive/total (%) | Adjusted seroprevalence, % (95% CI)† | No. seropositive/total (%) | Adjusted seroprevalence, % (95% CI)† | |||
Sex | ||||||||
F | 332/553 (60) | 67.4 (58.4–77.9) | 72/81 (89) | 99.7 (87.1–99.9) | 404/634 (64) | 71.5 (62.6–82.3) | ||
M |
208/352 (59) |
66.3 (56.5–77.3) |
78/81 (96) |
100 (93.2–100) |
286/433 (66) |
74.1 (64.5–85.6) |
||
Age, y | ||||||||
40–54 | 291/461 (63) | 70.8 (61.4;81.8) | 35/38 (92) | 100 (84.8–100) | 326/499 (65) | 73.3 (64.0–84.6) | ||
55–64 | 181/317 (57) | 64.1 (54.1–75.0) | 38/43 (88) | 99.1 (82.6–100) | 219/360 (61) | 68.3 (58.4–79.4) | ||
>65 |
68/127 (54) |
60.1 (46.9–73.1) |
77/81 (95) |
100 (92.4–100) |
145/208 (70) |
78.2 (67.0–91.2) |
||
Education | ||||||||
Secondary and lower | 26/47 (55) | 62.1 (42.7–81.0) | 9/9 (100) | 100 (66.7–100) | 35/56 (63) | 70.1 (52.5–88.1) | ||
Specialized secondary | 253/433 (58) | 65.6 (56.1–76.0) | 81/87 (93) | 100 (91.2–100) | 334/520 (64) | 72.1 (62.9–83.2) | ||
Higher |
261/425 (61) |
68.9 (59.3–79.8) |
60/66 (91) |
100 (88.0–100) |
321/491 (65) |
73.3 (64.0–84.6) |
||
Week of test | ||||||||
7–14 | 395/651 (61) | 68.1 (59.3–78,4) | 49/58 (84) | 94.8 (81.0–100) | 444/709 (63) | 70.3 (61.6–80.8) | ||
15–21 |
145/254 (57) |
64.0 (53.4–75.3) |
101/104 (97) |
100 (94.8–100) |
246/358 (69) |
77.1 (67.1–89.1) |
||
Self-reported prior symptoms of infection | ||||||||
No | 172/477 (36) | 40.5 (31.7–47.8) | 133/143 (93) | 100 (92.9–100) | 305/620 (49) | 55.2 (46.6–64.0) | ||
Yes | 248/256 (97) | 100 (96.9–100) | 8/9 (89) | 99.7 (56.8–100) | 256/265 (97) | 100 (96.7–100) | ||
Do not know |
120/172 (70) |
78.3 (66.5–91.6) |
9/10 (90) |
100 (60.4–100) |
129/182 (71) |
79.5 (68.1–92.8) |
||
Total | 540/905 (60) | 66.9 (58.6–76.9) | 150/162 (93) | 100 (92.9–100) | 690/1067 (65) | 72.6 (64.2–83.1) |
*Received >1 dose. †Values >100% were rounded to 100%. ‡Weeks 7–14 are February 24–April 11 and weeks 15–21 are April 12–May 28, 2021.
Page created: December 08, 2021
Page updated: January 22, 2022
Page reviewed: January 22, 2022
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