Table 2:
SARS-CoV-2 antibody seroprevalence by hospital and main work unit
| Hospital | Emergency department n = 580 |
Intensive care unit n = 469 |
COVID-19 unit n = 436 |
Non-COVID-10 unit n = 438 |
Other* n = 133 |
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| No. of HCWs | No. (%) with positive serology | No. of HCWs | No. (%) with positive serology | No. of HCWs | No. (%) with positive serology | No. of HCWs | No. (%) with positive serology | No. of HCWs | No. (%) with positive serology | |
| A, n = 207 | 50 | 1 (2.0) | 45 | 2 (4.4) | 41 | 2 (4.9) | 46 | 0 (0.0) | 25 | 0 (0.0) |
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| B, n = 219 | 61 | 2 (3.3) | 40 | 1 (2.5) | 52 | 4 (7.7) | 41 | 1 (2.4) | 25 | 0 (0.0) |
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| Low-incidence regions,† n = 426 |
111 | 3 (2.7) | 85 | 3 (3.5) | 93 | 6 (6.4) | 87 | 1 (1.2) | 50 | 0 (0.0) |
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| C, n = 211 | 50 | 2 (4.0) | 52 | 0 (0.0) | 42 | 2 (4.8) | 62 | 6 (9.7) | 5 | 0 (0.0) |
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| D, n = 215 | 60 | 0 (0.0) | 55 | 2 (3.6) | 28 | 3 (10.7) | 62 | 4 (6.4) | 10 | 1 (10.0) |
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| E, n = 198 | 84 | 6 (7.2) | 40 | 0 (0.0) | 28 | 4 (14.3) | 37 | 1 (2.7) | 10 | 2 (20.0) |
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| F, n = 217 | 57 | 6 (10.5) | 60 | 1 (1.7) | 43 | 5 (11.6) | 42 | 3 (7.1) | 15 | 1 (6.7) |
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| G, n = 190 | 55 | 7 (12.7) | 33 | 2 (6.1) | 65 | 13 (20.0) | 23 | 8 (34.8) | 14 | 4 (28.6) |
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| H, n = 221 | 52 | 7 (13.5) | 61 | 4 (6.6) | 50 | 26 (52.0) | 48 | 2 (4.2) | 10 | 1 (10.0) |
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| I, n = 172 | 61 | 9 (14.8) | 28 | 2 (7.1) | 39 | 15 (38.5) | 27 | 8 (29.6) | 17 | 5 (29.4) |
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| J, n = 206 | 51 | 6 (11.8) | 55 | 15 (27.3) | 48 | 27 (56.2) | 50 | 18 (36.0) | 2 | 0 (0.0) |
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| High-incidence region,† n = 1630 |
469 | 43 (9.2) | 384 | 26 (6.8) | 343 | 95 (27.7) | 351 | 50 (14.2) | 83 | 14 (16.9) |
Note: HCW = health care workers.
*
Participant works in other type of units or in different units (e.g., roving team).
†
Hospitals A and B are located in regions with low incidence of COVID-19 during the first wave of the pandemic (i.e., Capitale-Nationale and Eastern Townships). Hospitals C through J are located in the Montréal region, which had a high incidence of COVID-19 during the first wave.