Characteristics of intervention and comparison group in the ‘check your health preventive programme’ at the time of randomisation (January 2012)
| Characteristics | Intervention group | Comparison group | Total | P value |
| Total population, n (%) | 5250 (50.0) | 5255 (50.0) | 10 505 (100.0) | |
| Sex | ||||
| Women, n (%) | 2565 (48.9) | 2581 (49.1) | 5146 (49.0) | |
| Men, n (%) | 2685 (51.1) | 2673 (50.9) | 5358 (51.0) | 0.78 |
| Age at randomisation (years) | ||||
| Age, mean (SD) | 40.6 (5.6) | 40.5 (5.6) | 40.5 (5.6) | 0.25 |
| Age groups, n (%) | ||||
| 30, n (%) | 1093 (20.8) | 1129 (21.5) | 2222 (21.2) | |
| 35-, n (%) | 1316 (25.1) | 1351 (25.7) | 2667 (25.4) | |
| 40, n (%) | 1340 (25.5) | 1334 (25.4) | 2674 (25.5) | |
| 45, n (%) | 1501 (28.6) | 1440 (27.4) | 2941 (28.0) | 0.51 |
| Nationality | ||||
| Danish, n (%) | 4872 (92.8) | 4849 (92.3) | 9721 (92.6) | |
| Immigrants or descendants, n (%) | 376 (7.2) | 404 (7.7) | 780 (7.4) | 0.30 |
| Living alone | ||||
| No, n (%) | 4218 (80.3) | 4201 (80.0) | 8419 (80.2) | |
| Yes, n (%) | 1032 (19.7) | 1053 (20.0) | 2085 (19.8) | 0.62 |
| Educational attainment | ||||
| <10 years, n (%) | 1061 (20.6) | 1051 (20.4) | 2112 (20.5) | |
| 10–15 years, n (%) | 2549 (49.4) | 2603 (50.4) | 5152 (49.9) | |
| ≥15 years, n (%) | 1549 (30.0) | 1507 (29.2) | 3056 (29.6) | 0.55 |
| Income level | ||||
| Low, n (%) | 1738 (33.3) | 1750 (33.4) | 3488 (33.3) | |
| Middle, n (%) | 1712 (32.8) | 1773 (33.9) | 3485 (33.3) | |
| High, n (%) | 1775 (34.0) | 1711 (32.7) | 3486 (33.3) | 0.32 |
| Income (1000 DKK), mean (SD) | 233.9 (108.8) | 233.2 (100.8) | 233.6 (104.9) | 0.71 |
| Occupational status | ||||
| Employed, n (%) | 4085 (77.8) | 4032 (76.8) | 8117 (77.3) | |
| Self-employed, n (%) | 225 (4.3) | 249 (4.7) | 474 (4.5) | |
| Unemployed/benefits, n (%) | 232 (4.4) | 239 (4.6) | 471 (4.5) | |
| Social welfare recipients, n (%) | 599 (11.4) | 610 (11.6) | 1209 (11.5) | |
| Others, n (%) | 107 (2.0) | 121 (2.3) | 228 (2.2) | 0.62 |