Table 1.
Baseline characteristics of the study population.
| Characteristics | Male | Female |
|---|---|---|
| Age, mean (SD) | 55.4 (10.3) | 54.8 (10.2) |
| Number of days of alcohol consumption | ||
| None | 1,039,557 (42.5) | 3,294,571 (79.9) |
| 1–2/week | 708,169 (28.9) | 396,165 (9.6) |
| ≥3/week | 622,680 (25.4) | 113,522 (2.8) |
| Missing | 77,530 (3.2) | 316,950 (7.7) |
| Number of days of sweating exercise | ||
| None | 809,073 (33.1) | 1,742,508 (42.3) |
| 1–2/week | 812,531 (33.2) | 1,166,595 (28.3) |
| ≥3/week | 815,661 (33.3) | 1,198,527 (29.1) |
| Missing | 10,671 (0.4) | 13,578 (0.3) |
| Body mass index | ||
| <18.5 kg/m2 | 36,558 (1.5) | 61,006 (1.5) |
| 18.5–24.9 kg/m2 | 1,055,025 (43.1) | 1,945,352 (47.2) |
| ≥25 kg/m2 | 657,009 (26.8) | 1,039,464 (25.2) |
| Missing | 699,344 (28.6) | 1,075,386 (26.1) |
| Family history of cancer | ||
| No | 1,991,495 (81.4) | 3,281,754 (79.6) |
| Yes | 456,441 (18.7) | 839,454 (20.4) |
| Missing | - | - |
| History of chronic pulmonary obstructive disease | ||
| No | 2,379,348 (97.2) | 4,052,245 (98.3) |
| Yes | 68,588 (2.8) | 68,963 (1.7) |
| History of pneumoconiosis | ||
| No | 2,446,322 (99.9) | 4,120,887 (100) |
| Yes | 1614 (0.1) | 321 (<0.1) |
| History of interstitial pulmonary disease | ||
| No | 2,445,434 (99.9) | 4,118,519 (99.9) |
| Yes | 2502 (0.1) | 2689 (0.1) |