Study sample characteristics
| Characteristic | Overall | MUC5B genotype | ||
| GG | GT | TT | ||
| Number of participants | 4552 | 3959 | 569 | 24 |
| Age | 61 (10) | 61 (10) | 61 (10) | 60 (9) |
| Female sex | 51% | 51% | 53% | 50% |
| Race/ethnicity | ||||
| Non-Hispanic white | 41% | 37% | 68% | 75% |
| Asian | 13% | 15% | 2% | 0 |
| African-American | 24% | 25% | 10% | 4% |
| Hispanic | 22% | 23% | 20% | 21% |
| Smoking status | ||||
| Never smoker | 46% | 47% | 40% | 21% |
| Former smoker | 40% | 39% | 46% | 75% |
| Current smoker | 14% | 14% | 14% | 4% |
| Cigarette pack-years | 12 (22) | 11.5 (21.2) | 13.9 (23.4) | 19.4 (30.0) |
| Height (cm) | 167 (10) | 167 (10) | 168 (10) | 169 (7) |
| Weight (kg) | 79 (17) | 78 (17) | 80 (18) | 86 (21) |
| Telomere length (kb) | 4.4 (0.9) | 4.4 (0.9) | 4.4 (0.9) | 4.1 (0.9) |
Continuous variables presented as mean (SD).
Categorical variables presented as percentage.