Age (mean SD) (years) | 2034 | 61.2 | 4.2 | 1667 | 62.5 | 4.2 |
Family history of lung cancer (%) | 194 | 9.5 | | 203 | 12.2 | |
Cigarette smoking status (%) |
Never | 262 | 12.9 | | 63 | 3.8 | |
Former | 1062 | 52.2 | | 536 | 32.2 | |
Current | 710 | 34.9 | | 1068 | 64.0 | |
Number of cigarettes per day* † (mean SD) | 1663 | 17.0 | 10.6 | 1438 | 19.7 | 10.5 |
Years of smoking*,† (mean SD) (years) | 1737 | 33.3 | 11.9 | 1573 | 41.3 | 9.1 |
Consumption of fruit and vegetables (mean SD) (g/d) | 2034 | 345 | 156 | 1667 | 312 | 151 |
Alcohol consumption† |
0–30 g/day (%) | 1700 | 85.1 | | 1289 | 79.2 | |
≥ 30 g/day (%) | 298 | 14.9 | | 338 | 20.8 | |
Occupational exposure to silica |
Unknown or uncodable occupational history (%) | 168 | 8.3 | | 127 | 7.6 | |
Never exposed in any job (%) | 1638 | 80.5 | | 1330 | 79.8 | |
Ever exposed (%) | 228 | 11.2 | | 210 | 12.6 | |
Duration (mean SD) (years) | | 18.8 | 13.7 | | 24.5 | 14.0 |
Concentration (mean SD) (mg/m3) | | 0.096 | 0.116 | | 0.102 | 0.109 |
Cumulative exposure (mean SD) (mg/m3.year) | | 1.57 | 2.36 | | 2.29 | 2.89 |
≥90% probability of being exposed (%) | 85 | 4.2 | | 96 | 5.8 | |
Duration (mean SD) (years) | | 18.7 | 13.5 | | 23.4 | 14.0 |
Concentration (mean SD) (mg/m3) | | 0.172 | 0.114 | | 0.158 | 0.084 |
Cumulative exposure (mean SD) (mg/m3.year) | | 2.68 | 1.83 | | 3.53 | 2.70 |