Table 1.
Study population characteristics of the overall ARDCo and the ARDCo‑Nut subsample (males only).
| Characteristic | All participants (n = 14,515) | ARDCo-Nut (n = 3,579) |
|---|---|---|
| Age at baseline (years)a | 63.2 ± 5.6 | 62.7 ± 5.2 |
| < 60 | 2,825 (19.5%) | 766 (21.4%) |
| 60–74 | 11,235 (77.4%) | 2,749 (76.8%) |
| ≥ 75 | 455 (3.1%) | 64 (1.8%) |
| Follow-up (years) | ||
| Median, min–max | 10.2 (8.5–11.3) | 10.2 (8.6–11.3) |
| Smoking status at baseline | ||
| Never smokers | 2,960 (20.4%) | 906 (25.3%) |
| Former smokers | 6,005 (41.4%) | 1,978 (55.3%) |
| Current smokers | 857 (5.9%) | 174 (4.9%) |
| Missing data | 4,693 (32.3%) | 521 (14.6%) |
| Duration of exposure to asbestos (years)a | 30.9 ± 10.6 | 31.8 ± 10.3 |
| Not exposed | 656 (4.5%) | 155 (4.3%) |
| < 20 | 2,162 (14.9%) | 485 (13.5%) |
| 20–29 | 2,679 (18.5%) | 580 (16.2%) |
| 30–39 | 5,925 (40.8%) | 1,500 (41.9%) |
| ≥ 40 | 3,093 (21.3%) | 859 (24.0%) |
| Cumulative exposure index to asbestos, exposure-unit/yearsa | 60.1 ± 99.1 | 58.2 ± 96.4 |
| 0–< 3 | 3,602 (24.8%) | 822 (23.0%) |
| 3–< 20 | 3,641 (25.1%) | 622 (25.8%) |
| 20–< 41 | 3,601 (24.8%) | 934 (26.1%) |
| ≥ 41 | 3,671 (25.3%) | 901 (25.2%) |
| TSFE (years)a | 53.4 ± 7.5 | 53.4 ± 7.0 |
| Not exposed | 656 (4.5%) | 155 (4.3%) |
| < 40 | 496 (3.4%) | 106 (3.0%) |
| 40–49 | 3,207 (22.1%) | 749 (20.9%) |
| 50–59 | 7,648 (52.7%) | 1,986 (55.5%) |
| ≥ 60 | 2,508 (17.3%) | 583 (16.3%) |
| Time since last exposure to asbestos (years)a | 41.70 ± 14.8 | 41.23 ± 14.6 |
| Not exposed | 656 (4.5%) | 155 (4.3%) |
| < 40 | 4,373 (30.1%) | 1,148 (32.1%) |
| 40–49 | 4,335 (29.9%) | 1,089 (30.4%) |
| 50–59 | 4,317 (29.7%) | 1,001 (28.0%) |
| ≥ 60 | 834 (5.8%) | 186 (5.2%) |
| Colon cancer (yes) | 181 (1.2%) | 41 (1.1%) |
| Rectal cancer (yes) | 62 (0.4%) | 17 (0.5%) |
| Note: Min–max, minimum–maximum; n, overall number of participants by category; SD, standard deviation; TSFE, time since first exposure to asbestos. aData shown as mean ± SD. | ||