Table 1.
Baseline characteristics of study participants in cohorts.
| Characteristics | Unvaccinated (PUs 1) |
Partially Vaccinated (PUs) |
Fully Vaccinated (PUs) |
Previously Infected | Partially Vaccinated (PIs 2) |
Fully Vaccinated (PIs) |
|
|---|---|---|---|---|---|---|---|
| Mean age ± SD 3 (years) | 39.4 ± 13.9 | 43.7 ± 13.5 | 43.8 ± 13.4 | 42.2 ± 13.3 | 42.4 ± 13.4 | 42.6 ± 13.2 | |
| Mean follow-up ± SD (days) | 135.9 ± 90.8 | 25.9 ± 18.0 | 185.1 ± 51.5 | 119.5 ± 77.0 | 28.1 ± 12.9 | 154.0 ± 51.9 | |
| All employees (% PCR+ 4) | 6325 (3%) | 6369 (0.4%) | 5967 (0.6%) | 1155 (0.3%) | 1003 (0.2%) | 951 (0%) | |
|
Sex
(% PCR+) |
Female | 4777 (3.1%) | 4671 (0.4%) | 4353 (0.6%) | 893 (0.1%) | 755 (0.1%) | 715 (0.0%) |
| Male | 1548 (2.8%) | 1698 (0.3%) | 1614 (0.6%) | 262 (0.8%) | 248.(0.4%) | 236 (0.0%) | |
|
Age
(% PCR+) |
≤30 years | 1920 (2.4%) | 1264 (0.2%) | 1158 (0.3%) | 265 (0.4%) | 236 (0.4%) | 218 (0.0%) |
| >30–45 years | 2232 (3.3%) | 2148 (0.4%) | 2022 (0.7%) | 401 (0.0%) | 338 (0.0%) | 320 (0.0%) | |
| >45–60 years | 1641 (3.8%) | 2141 (0.5%) | 2046 (0.6%) | 389 (0.5%) | 324 (0.3%) | 313 (0.0%) | |
| >60 years | 532 (2.1%) | 816 (0.4%) | 741 (0.7%) | 100 (0.0%) | 105 (0.0%) | 100 (0.0%) | |
|
Employees
(% PCR+) |
HCWs 5 | 4391 (3.2%) | 4792 (0.4%) | 4493 (0.7%) | 950 (0.3%) | 846 (0.1%) | 803 (0.0%) |
| Others | 1934 (2.7%) | 1577 (0.3%) | 1474 (0.2%) | 205 (0.0%) | 157 (0.6%) | 148 (0.0%) | |
| Employment status (% PCR+) | Full-time | 4561 (3.9%) | 5549 (0.4%) | 5223 (0.7%) | 1063 (0.2%) | 945 (0.2%) | 899 (0.0%) |
| Part-time | 1764 (0.9%) | 820 (0.1%) | 744 (0.3%) | 92 (1.1%) | 58 (0.0%) | 52 (0.0%) | |
|
Hospital
(% PCR+) |
BUH 6 | 2441 (3.5%) | 2283 (0.4%) | 2175 (0.6%) | 430 (0.0%) | 375 (0.0%) | 353 (0.0%) |
| KVUH 7 | 2741 (2.5%) | 2564 (0.5%) | 2350 (0.4%) | 461 (0.4%) | 367 (0.0%) | 352 (0.0%) | |
| IKEM 8 | 1143 (3.3%) | 1522 (0.1%) | 1442 (0.9%) | 264 (0.4%) | 261 (0.8%) | 246 (0.0%) | |
1 PUs: previously uninfected; 2 PIs: previously infected; 3 SD: standard deviation; 4 PCR+: positive result of RT-PCR; 5 HCWs: health care workers; 6 BUH: Bulovka University Hospital; 7 KVUH: Královské Vinohrady University Hospital; 8 IKEM: Institute for Clinical and Experimental Medicine.