Multivariate model associating current asthma with tumour necrosis factor-α (TNFA) -308 polymorphism and obesity
| Variables | OR (95% CI) | Mutually adjusted OR (95% CI) |
| BMI kg·m−2 | ||
| <20 | 0.78 (0.56–1.07) | 0.76 (0.54–1.06) |
| 20 to <25 | 1 (ref) | 1 (ref) |
| 25 to <30 | 0.95 (0.75–1.20) | 0.91 (0.71–1.15) |
| ≥30 | 2.36 (1.72–3.21) | 2.23 (1.60–3.06) |
| TNFA -308 | ||
| GG | 1 (ref) | 1 (ref) |
| GA | 1.33 (1.08–1.62) | 1.41 (1.14–1.73) |
| AA | 1.41 (0.83–2.28) | 1.48 (0.85–2.42) |
Logistic regression adjusted by country, age, sex, smoking status. OR: odds ratio; CI: confidence interval; BMI: body mass index; ref: reference value.