Table 1.
Baseline characteristics of the participants (n=405 878). Values are numbers (percentages) unless stated otherwise
| Characteristics | Men (n=194 686) | Women (n=211 192) |
|---|---|---|
| Mean (SD) age (years) | 40.5 (13.8) | 40.3 (13.8) |
| Education: | ||
| Middle school or lower | 38 018 (19.5) | 64 861 (30.7) |
| High school | 44 352 (22.8) | 51 927 (24.6) |
| Junior college | 43 400 (22.3) | 40 711 (19.3) |
| College or higher | 60 628 (31.1) | 44 710 (21.2) |
| Missing | 8288 (4.3) | 8983 (4.3) |
| Occupation: | ||
| White collar | 91 447 (47.0) | 83 016 (39.3) |
| Blue collar | 48 533 (24.9) | 16 634 (7.9) |
| Self employed | 17 841 (9.2) | 14 878 (7.0) |
| House wife, house husband | 1799 (0.9) | 65 006 (30.8) |
| Other | 23 078 (11.9) | 18 301 (8.7) |
| Missing | 11 988 (6.2) | 13 357 (6.3) |
| Smoking status: | ||
| Never | 88 309 (45.4) | 176 623 (83.3) |
| Former | 19 881 (10.2) | 3119 (1.5) |
| Current | 75 815 (38.9) | 12 836 (6.1) |
| Missing | 10 681 (5.5) | 18 614 (8.8) |
| Mean (SD) pack years* | 17.2 (17.5) | 7.4 (11.8) |
| Alcohol consumption: | ||
| Never | 117 372 (60.3) | 173 433 (82.2) |
| Former | 8512 (4.4) | 2628 (1.2) |
| Current | 56 931 (29.2) | 13 531 (6.4) |
| Missing | 11 871 (6.1) | 21 600 (10.2) |
| Mean (SD) grams of alcohol/day† | 9.5 (11.5) | 6.2 (10.8) |
| Physical activity: | ||
| Inactive | 93 620 (48.1) | 125 273 (59.3) |
| Low active | 42 869 (22.0) | 44 970 (21.3) |
| Medium active | 30 924 (15.9) | 24 128 (11.4) |
| High active | 13 717 (7.1) | 9916 (4.7) |
| Very high active | 13 516 (6.9) | 6896 (3.3) |
| Missing | 40 (0.02) | 11 (0.01) |
| Mean (SD) body mass index‡ | 23.8 (3.4) | 22.2 (3.6) |
| Mean (SD) fruit and vegetable intake§ (portions/day) | 5.1 (2.8) | 5.2 (2.7) |
*
Among ever smokers and missing for 5640 (1.4%) participants.
†
Among ever drinkers and missing for 14 782 (3.6%) participants.
‡
Missing for 952 (0.2%) participants.
§
Missing for 14 017 (3.5%) participants.