Comparisons of socio-demographic characteristics and smoking habits between the participants in the control group and the participants in the screen group with normal results in the prevalence round
| Categories | n/n | Control group, n=2052 | Screen group, n=1873 | p Value* |
| n (%)/mean (SD) | n (%)/mean (SD) | |||
| Socio-demographics | ||||
| Gender | ||||
| Male | 2052/1873 | 1120 (54.6) | 1073 (57.3) | 0.088 |
| Female | 932 (45.4) | 800 (42.7) | ||
| Age† (mean) | ||||
| 2052/1873 | 57.3 (4.8) | 57.2 (4.8) | 0.6433 | |
| Social group‡ | ||||
| I | 2040/1866 | 141 (6.9) | 144 (7.7) | 0.8508 |
| II | 410 (20.1) | 370 (19.8) | ||
| III | 378 (18.5) | 341 (18.3) | ||
| IV | 552 (27.1) | 494 (26.5) | ||
| V | 282 (13.8) | 242 (13.0) | ||
| Employed, social group uncertain | 168 (8.2) | 171 (9.2) | ||
| Outside the labour market | 109 (5.3) | 104 (5.6) | ||
| School education | ||||
| 7–9 Grade | 2047/1870 | 716 (35.0) | 633 (33.9) | 0.1961 |
| 10 Grade | 790 (38.6) | 705 (37.7) | ||
| Upper secondary school leaving exam | 532 (26.0) | 515 (27.5) | ||
| Other | 9 (0.4) | 17 (0.9) | ||
| Vocational education | ||||
| None | 2048/1868 | 201 (9.8) | 172 (9.2) | 0.2943 |
| Semi-skilled worker | 27 (1.3) | 19 (1.0) | ||
| Vocational training | 725 (35.4) | 643 (34.4) | ||
| Short further education | 194 (9.5) | 183 (9.8) | ||
| Middle range training | 539 (26.3) | 463 (24.8) | ||
| Long further education | 225 (11.0) | 240 (12.9) | ||
| Other | 137 (6.7) | 148 (7.9) | ||
| Employment status | ||||
| Employed | 2046/1868 | 1325 (64.8) | 1264 (67.7) | 0.1338 |
| Studying | 12 (0.6) | 8 (0.4) | ||
| Job seeking | 104 (5.1) | 103 (5.5) | ||
| Retired | 605 (29.6) | 493 (26.4) | ||
| Region of habitat | ||||
| Capital region | 2045/1862 | 1654 (80.9) | 1493 (80.2) | 0.8755 |
| Region Zealand | 349 (17.1) | 329 (17.7) | ||
| Region of Southern Denmark | 28 (1.4) | 30 (1.6) | ||
| Central Denmark Region | 11 (0.5) | 7 (0.4) | ||
| North Denmark Region | 3 (0.2) | 3 (0.2) | ||
| Living alone | ||||
| No | 2035/1865 | 1453 (71.4) | 1331 (71.4) | 0.9817 |
| Yes | 582 (28.6) | 534 (28.6) | ||
| Smoking habits | ||||
| Smoking status | ||||
| Current smoker | 2052/1873 | 1579 (77.0) | 1411 (75.3) | 0.2353 |
| Former smoker | 473 (23.0) | 462 (24.7) | ||
| Smoking history§ (mean) | ||||
| 2048/1872 | 35.9 (13.4) | 36.3 (13.4) | 0.3229 | |
| Motivation for smoking cessation | ||||
| Very strong | 2022/1856 | 224 (11.1) | 174 (9.4) | 0.3780 |
| Strong | 503 (24.9) | 485 (26.1) | ||
| Weak | 492 (24.3) | 437 (23.6) | ||
| Very weak | 159 (7.9) | 133 (7.2) | ||
| No wish to quit | 171 (8.5) | 165 (8.9) | ||
| Current non-smoker | 473 (23.4) | 462 (24.9) | ||