Interaction between late-onset asthma and smoking on post-BD FEV1/FVC (% predicted)
| Smoking (≥1 pack-year) | Post-BD FEV1/FVC | p[Interaction] | |
|---|---|---|---|
| Control (never asthma) | No | Reference | |
| Yes | −1.94 (−3.34 to −0.54)* | ||
| Late-onset | No | −0.65 (−0.34 to 2.04) | 0.01 |
| Yes | −7.61 (−10.26 to −4.97)† |
Adjusted for smoking status, social class, family history of obstructive lung disease, childhood lung infection.
*p<0.01; †p<0.001.
BD, bronchodilator.
The bolded text identifies results reaching statistical significance (p<0.05).