Baseline characteristics of the population during the initial COVID-19 lockdown (13 March 2020–3 May 2020) and the corresponding calendar period in the year before (13 March 2019–3 May 2019) by educational level
| Year | Variable | Level | Educational level | ||
| Low | Medium | High | |||
| 2019 | Total | N | 652 965 | 1 331 524 | 772 198 |
| Major cardiovascular events | N (%) | 993 (0.2) | 1225 (0.1) | 482 (0.1) | |
| Age | Median (IQR) | 64 (53–74) | 57 (49–68) | 55 (47–66) | |
| Men | N (%) | 292 036 (44.7) | 701 757 (52.7) | 320 514 (41.5) | |
| Living alone | N (%) | 280 905 (43.0) | 404 188 (30.4) | 215 418 (27.9) | |
| Income (EUR) | Median (IQR) | 26 700(22 100–35,300) | 35 000(27 000–44 800) | 43 200(33 700–56 100) | |
| Ethnicity | Danish | 585 818 (89.7) | 1 215 450 (91.3) | 694 054 (89.9) | |
| Immigrants | 64 725 (9.9) | 112 142 (8.4) | 75 001 (9.7) | ||
| Descendants | 2422 (0.4) | 3932 (0.3) | 3143 (0.4) | ||
| Diabetes | N (%) | 71 743 (11.0) | 91 647 (6.9) | 31 242 (4.0) | |
| Chronic obstructive lung disease | N (%) | 31 290 (4.8) | 29 517 (2.2) | 8843 (1.1) | |
| Hypertension | N (%) | 143 386 (22.0) | 203 039 (15.2) | 79 232 (10.3) | |
| Atrial fibrillation | N (%) | 32 164 (4.9) | 44 410 (3.3) | 21 551 (2.8) | |
| Peripheral artery disease | N (%) | 22 991 (3.5) | 29 349 (2.2) | 10 191 (1.3) | |
| Ischaemic heart disease | N (%) | 35 225 (5.4) | 50 335 (3.8) | 21 443 (2.8) | |
| Chronic kidney disease | N (%) | 8559 (1.3) | 10 345 (0.8) | 3881 (0.5) | |
| 2020 | Total | N | 645 355 | 1 345 043 | 792 208 |
| Major cardiovascular events | N (%) | 767 (0.1) | 1098 (0.1) | 425 (0.1) | |
| Age | Median (IQR) | 64(53, 75) | 57(49, 68) | 55(47, 66) | |
| Men | N (%) | 290 783 (45.1) | 708 522 (52.7) | 327 469 (41.3) | |
| Living alone | N (%) | 280 449 (43.5) | 412 421 (30.7) | 221 876 (28.0) | |
| Income (EUR) | Median (IQR) | 26 800 (22 200–35 400) | 35 000 (27 100–44 800) | 43 100 (33 700–55 800) | |
| Ethnicity | Danish | 576 097 (89.3) | 1 227 319 (91.2) | 711 590 (89.8) | |
| Immigrants | 66 534 (10.3) | 113 304 (8.4) | 77 121 (9.7) | ||
| Descendants | 2724 (0.4) | 4420 (0.3) | 3497 (0.4) | ||
| Diabetes | N (%) | 74 689 (11.6) | 98 372 (7.3) | 34 218 (4.3) | |
| Chronic obstructive lung disease | N (%) | 31 792 (4.9) | 30 790 (2.3) | 9257 (1.2) | |
| Hypertension | N (%) | 139 386 (21.6) | 204 784 (15.2) | 80 253 (10.1) | |
| Atrial fibrillation | N (%) | 34 096 (5.3) | 48 653 (3.6) | 23 705 (3.0) | |
| Peripheral artery disease | N (%) | 23 851 (3.7) | 31 628 (2.4) | 11 180 (1.4) | |
| Ischaemic heart disease | N (%) | 36 081 (5.6) | 52 666 (3.9) | 22 526 (2.8) | |
| Chronic kidney disease | N (%) | 8423 (1.3) | 10 451 (0.8) | 3946 (0.5) | |