Table 1.
Prevalence of at least one positive SARS-CoV-2 RT-PCR test by characteristics of Danish male and female employees during the COVID-19 pandemic from week 8 of 2020 to week 52 of 2021
| Characteristic | Men | Women | ||
| Total (N) | Ever positive RT-PCR test (%) | Total (N) | Ever positive RT-PCR test (%) | |
| Sex, % ever testing RT-PCR positive | 1 274 370 | 10.3 | 1 178 172 | 10.9 |
| Age (years) | ||||
| 20–<30 | 260 918 | 13.6 | 236 569 | 14.1 |
| 30–<40 | 275 776 | 11.2 | 249 010 | 12.3 |
| 40–<50 | 298 547 | 10.6 | 284 747 | 11.5 |
| 50–<60 | 297 951 | 8.5 | 287 463 | 8.5 |
| 60+ | 141 178 | 6.5 | 120 383 | 6.5 |
| Geographical region | ||||
| Capital | 410 947 | 15.2 | 401 203 | 15.7 |
| Zealand | 176 827 | 10.2 | 162 902 | 11.1 |
| South | 238 305 | 7.1 | 212 381 | 7.3 |
| Central | 297 423 | 7.9 | 267 526 | 8.1 |
| North | 150 868 | 7.7 | 133 160 | 7.9 |
| Duration of education (years) | ||||
| ≤10 | 295 236 | 11.0 | 394 354 | 11.2 |
| >10–13 | 569 720 | 9.3 | 444 206 | 9.7 |
| >13–16 | 280 763 | 12.5 | 277 423 | 12.5 |
| >16 | 97 509 | 9.5 | 43 613 | 11.5 |
| Missing | 31 142 | 9.8 | 17 576 | 10.9 |
| Country of birth | ||||
| Denmark | 1 095 062 | 9.5 | 1 027 040 | 10.0 |
| Other Western countries | 39 782 | 9.6 | 33 592 | 10.4 |
| Eastern Europe | 57 468 | 13.9 | 45 736 | 15.4 |
| Low-income countries | 81 899 | 20.7 | 70 718 | 21.6 |
| Missing | 159 | 27.0 | 86 | 25.6 |
| Number of hospital admissions, 2010–2020 4 | ||||
| 0 | 1 107 771 | 10.6 | 950 570 | 11.1 |
| 1 | 126 235 | 9.4 | 188 757 | 10.5 |
| ≥2 | 30 364 | 8.6 | 37 845 | 9.9 |
| Probability of tobacco smoking (JEM assigned) | ||||
| <10% | 26 352 | 10.7 | 72 229 | 9.9 |
| 10–<20% | 475 984 | 10.1 | 618 042 | 10.6 |
| 20%+ | 556 205 | 10.5 | 351 505 | 11.8 |
| Missing | 215 929 | 10.9 | 135 396 | 10.9 |
| Body mass index (kg/m2) (JEM assigned) | ||||
| <25 | 217 499 | 13.4 | 531 232 | 12.0 |
| ≥25 | 840 942 | 9.4 | 510 544 | 9.8 |
| Missing | 215 929 | 10.7 | 135 396 | 10.9 |
| Number of household members | ||||
| 1 | 244 767 | 8.7 | 175 841 | 9.5 |
| 2 | 409 460 | 9.2 | 419 905 | 9.3 |
| 3 | 233 389 | 10.7 | 230 766 | 11.1 |
| 4+ | 386 754 | 12.5 | 351 160 | 13.4 |
| Average number of RT-PCR tests in the employee’s occupation (four-digit DISCO-08 code) during follow-up, quintiles | ||||
| 0–9 | 327 945 | 8.8 | 55 889 | 8.2 |
| >9–10 | 339 452 | 10.8 | 265 947 | 11.0 |
| >10–12 | 269 442 | 10.3 | 191 274 | 10.1 |
| >12–14 | 228 990 | 11.1 | 287 274 | 10.6 |
| >14–28 | 108 541 | 12.9 | 376 788 | 11.9 |
| Second COVID-19 vaccination obtained | ||||
| 1 January 2021–30 June 2021 | 373 343 | 8.2 | 436 546 | 8.7 |
| 1 July 2021–14 December 2021 | 752 894 | 9.9 | 631 132 | 10.4 |
| Less than two vaccinations by 14 December 2021 | 148 133 | 18.7 | 109 494 | 22.8 |
DISCO, Danish Version of the International Standard Classification of Occupations; JEM, job exposure matrix; RT-PCR, real-time PCR.