Table 1.
Characteristics of participants
| Total n=630 |
CT group n=382 | Control group n=248 | |||||
| True negative | False positive | True positive | P value* | Missing | |||
| n=252 | n=91 | n=39 | n=248 | ||||
| Round, n (%) | 0.543 | 0 | |||||
| 2 | 158 (25.1) | 68 (27.0) | 26 (28.6) | 9 (23.1) | 55 (22.2) | ||
| 3 | 196 (31.1) | 76 (30.2) | 24 (26.4) | 14 (35.9) | 82 (33.1) | ||
| 4 | 76 (12.1) | 31 (12.3) | 10 (11.0) | 8 (20.5) | 27 (10.9) | ||
| 5 | 200 (31.8) | 77 (30.6) | 31 (34.1) | 8 (20.5) | 84 (33.9) | ||
| Sex, n (%) | 0.174 | 0 | |||||
| Men | 298 (47.3) | 118 (46.8) | 37 (40.7) | 24 (61.5) | 119 (48.0) | ||
| Women | 332 (52.7) | 134 (53.2) | 54 (59.3) | 15 (38.5) | 129 (52.0) | ||
| Age (years), median (IQR) | 58 (55–62) | 58 (55–62) | 58 (54–61) | 60 (58–65) | 59 (55–62) | 0.017 | 0 |
| Social group, n (%) | 0.334 | 1 | |||||
| I | 42 (6.7) | 23 (9.2) | 3 (3.3) | 1 (2.6) | 15 (6.1) | ||
| II | 132 (21.0) | 51 (20.3) | 13 (14.3) | 9 (23.1) | 59 (23.8) | ||
| III | 126 (30.0) | 53 (21.1) | 15 (16.5) | 6 (15.4) | 52 (21.0) | ||
| IV | 158 (25.1) | 57 (22.7) | 28 (30.8) | 13 (33.3) | 60 (24.2) | ||
| V | 81 (12.9) | 29 (11.6) | 13 (14.3) | 6 (15.4) | 33 (13.3) | ||
| Employed, social group uncertain | 54 (8.6) | 21 (8.4) | 12 (13.2) | 1 (2.6) | 20 (8.1) | ||
| Outside the labour market | 36 (5.7) | 17 (6.8) | 7 (7.7) | 3 (7.7) | 9 (3.6) | ||
| School education, n (%) | 0.321 | 0 | |||||
| 7–9 years in school | 242 (38.4) | 88 (34.9) | 45 (49.5) | 16 (41.0) | 93 (37.5) | ||
| 10 years in school | 229 (36.4) | 99 (39.3) | 27 (29.7) | 15 (38.5) | 88 (35.5) | ||
| 11–13 years in school | 159 (25.2) | 65 (25.8) | 19 (20.9) | 8 (20.5) | 67 (27.0) | ||
| Employment status, n (%) | 0.219 | 1 | |||||
| Employed | 374 (59.5) | 158 (62.7) | 48 (52.8) | 18 (47.4) | 150 (60.5) | ||
| Studying | 2 (0.3) | 0 (0.0) | 1 (1.1) | 0 (0.0) | 1 (0.4) | ||
| Job seeking | 35 (5.6) | 17 (6.8) | 7 (7.7) | 3 (7.9) | 8 (3.2) | ||
| Retired | 218 (34.7) | 77 (30.6) | 35 (38.5) | 17 (44.7) | 89 (35.9) | ||
| Region of residence, n (%) | 0.043 | 1 | |||||
| Capital Region | 522 (83.0) | 310 (83.3) | 70 (76.9) | 32 (82.1) | 210 (85.0) | ||
| Region Zealand | 98 (15.6) | 34 (13.5) | 20 (22.0) | 7 (18.0) | 37 (15.0) | ||
| Region of Southern Denmark | 9 (1.4) | 8 (3.2) | 1 (1.1) | 0 (0.0) | 0 (0.0) | ||
| Living alone, n (%) | 0.147 | 4 | |||||
| No | 430 (68.7) | 175 (69.7) | 54 (59.3) | 25 (64.1) | 176 (71.8) | ||
| Yes | 196 (31.3) | 76 (30.3) | 37 (40.7) | 14 (35.9) | 69 (28.2) | ||
| Smoking status, n (%) | 0.195 | 0 | |||||
| Current smoker | 473 (75.1) | 183 (72.6) | 72 (79.1) | 34 (87.2) | 184 (74.2) | ||
| Former smoker | 157 (24.9) | 69 (27.4) | 19 (20.9) | 5 (12.8) | 64 (25.8) | ||
| Smoking history (pack years), median (IQR) | 34 (27–43) | 34 (27–43) | 34 (27–43) | 43 (34–49) | 33 (26–42) | 0.001 | 1 |
| Charlson Comorbidity Index, n (%) | 0.913 | 0 | |||||
| 0 | 590 (93.7) | 235 (93.3) | 83 (91.2) | 36 (92.3) | 236 (95.2) | ||
| 1 | 25 (4.0) | 10 (4.0) | 5 (5.5) | 2 (5.1) | 8 (3.2) | ||
| ≥2 | 15 (2.4) | 7 (2.8) | 3 (3.3) | 1 (2.6) | 4 (1.6) | ||
*P value of a Pearson’s χ2 test (categorical variables) or a Kruskal-Wallis test (continuous variables); p values are estimates of the exact p values based on 10 000 Monte Carlo simulations under the null-hypothesis.