Table 1.
Subjects’ characteristics. * Who had quit within 15 years (>30 pack/y); ** of these, two were extra-pulmonary tumors (one thymoma and one mesothelioma).
| N (%) | Mean ± SD | Median (IQR) | |
|---|---|---|---|
| Age (years) | 64 ± 6.6 | 64 (59.7–68.9) | |
| Gender | |||
| M | 693 (62.3%) | ||
| F | 419 (37.7%) | ||
| BMI | 25.3 ± 4.1 | 25 (22.6–27.8) | |
| Smoking status | |||
| Active | 862 (77.8%) | ||
| M | 508 (58.9%) | ||
| F | 354 (41.1%) | ||
| Former * | 250 (22.2%) | ||
| Smoking duration (years) | 42.5 ± 7.5 | 42 (40–48) | |
| Pack/y | 48.5 ± 19.8 | 45 (35.2–57) | |
| PLCOm2012 risk | 5.6 ± 4.9 | 4 (2.6–6.6) | |
| Personal history of cancer | 120 (11%) | ||
| Family history of lung cancer | 420 (38%) | ||
| Educational level | 2.47 ± 1.16 | 2 (2–4) | |
| 1 | 217 (20%) | ||
| 2 | 506 (46%) | ||
| 3 | 73 (6.6%) | ||
| 4 | 288 (26%) | ||
| 5–6 | 28 (2.5%) | ||
| FEV1 % | 91 ± 17.7 | 92 (80–103) | |
| Emphysema | |||
| Mild | 209 (19%) | ||
| Moderate | 128 (11%) | ||
| Severe | 47 (4.2%) | ||
| Maisonneuve (baseline LDCT) | |||
| All | 1112 (100%) | 1.02 ± 2.5 | 0.47 (0.33–0.75) |
| Negative | 762 (69%) | 0.44 ± 0.22 | 0.39 (0.29–0.54) |
| Indeterminate or suspicious findings | 350 (31%) ** | 2.3 ± 4.19 | 0.89 (0.56–1.97) |
| Maximum diameter (mm) | 8.14 ± 7.43 | 5.86 (4.5–8) |