Age <40 yrs# | Age ≥40 yrs¶ | |||||
Subjects n | Cases n (%) | Adjusted OR (95% CI)+ | Subjects n | Cases n (%) | Adjusted OR (95% CI)+ | |
BMI | ||||||
Normal BMI <25.0 kg·m−2 | 1989 | 52 (2.6) | 1.00 | 1870 | 40 (2.1) | 1.00 |
General overweight 25.0–29.9 kg·m−2 | 2067 | 53 (2.6) | 1.00 (0.67–1.47) | 3277 | 96 (2.9) | 1.45 (0.99–2.11) |
General obesity ≥30.0 kg·m−2 | 439 | 15 (3.4) | 1.28 (0.71–2.32) | 8119 | 43 (5.3) | 2.35 (1.50–3.68) |
p-value for trend | 0.55 | 0.001 | ||||
BMI continuous§ | 4495 | 120 (2.7) | 1.18 (0.90–1.53) | 5966 | 179 (3.0) | 1.54 (1.25–1.90) |
BMI: body mass index. #: n=4,495; ¶: n=5,966; +: adjusted for smoking, physical activity, education, family history of asthma, social benefits and economic difficulties at baseline; §: BMI per 5-unit increase.