| Females# | Males¶ | p-value | |
| Age yrs | |||
| 19–29 | 2025 (15.8) | 1473 (14.1) | <0.001 |
| 30–39 | 3884 (30.4) | 3022 (28.9) | |
| 40–49 | 4899 (38.3) | 4223 (40.4) | |
| 50–55 | 1976 (15.5) | 1743 (16.7) | |
| Smoking+ | |||
| Yes | 4074 (33.7) | 2631 (26.4) | <0.001 |
| No | 8019 (66.3) | 7340 (73.6) | |
| Education yrs+ | |||
| <10 | 2723 (21.5) | 1947 (18.8) | <0.001 |
| 10–12 | 6509 (51.4) | 5816 (56.1) | |
| ≥13 | 3443 (27.2) | 2608 (25.2) | |
| Physical activity h·week−1+ | |||
| <1 | 2586 (22.2) | 2675 (29.1) | <0.001 |
| 1–2 | 4997 (42.8) | 3385 (36.9) | |
| ≥3 | 4088 (35.0) | 3120 (34.0) | |
| Social benefits+ | |||
| Yes | 2900 (27.4) | 1076 (13.1) | <0.001 |
| No | 7694 (72.6) | 7126 (86.9) | |
| Economic difficulties+ | |||
| Yes | 3699 (33.1) | 2692 (31.0) | 0.002 |
| No | 7480 (66.9) | 5989 (69.0) | |
| Family history of asthma+ | |||
| Yes | 2145 (18.7) | 1244 (13.0) | <0.001 |
| No | 9345 (81.3) | 8313 (87.0) | |
| General obesity§ | 1534 (12.0) | 1258 (12.0) | 0.95 |
| Abdominal obesityƒ | 2241 (17.5) | 929 (8.9) | <0.001 |
| Cumulative incidence of asthma | 519 (4.1) | 299 (2.9) | <0.001 |
Data are presented as n (%), unless otherwise stated. #: n=12,784; ¶: n=10,461; +: numbers do not sum to the total cohort due to missing figures; §: general obesity (body mass index ≥30.0 kg·m−2); ƒ: abdominal obesity (waist circumference ≥88.0 cm in females, ≥102.0 cm in males).