Odds ratios (OR) of developing two or more respiratory symptoms† according to baseline characteristics in asymptomatic subjects at baseline (using multivariate logistic regression analysis)
| Characteristics | OR (95% CI) |
|---|---|
| *p<0.1; **p<0.05; ***p<0.01. | |
| †At least two of the following symptoms: wheezing, shortness of breath, chest tightness, cough, respiratory complaints upon exertion. | |
| Factors | |
| AHR ⩽8 v >8 mg/ml | 8.33 (2.65 to 26.16)*** |
| Non-specific rhinitis | 2.35 (0.90 to 6.11)* |
| Rhinitis to animals | 2.14 (0.81 to 5.64) |
| Rhinitis to pollen | 0.67 (0.24 to 1.84) |
| Family history of asthma | 1.15 (0.38 to 3.48) |
| Interaction terms | |
| Family history of asthma × rhinitis to pollen | 6.31 (1.25 to 31.89)** |