Table 4.
Bronchodilator response in FEV1 at asthma diagnosis by age groups in SAAS cohort
| Age at asthma diagnosis < 40 years n = 83 |
Age at asthma diagnosis 40–59.9 years n = 115 |
Age at asthma diagnosis ≥ 60 years n = 47 |
p-value | |
|---|---|---|---|---|
| FEV1 BDR mL | 190 (100–330) | 130 (60–340) | 180 (30–310) | 0.266 |
| FEV1 BDR % | 6.1 (3.1–11.2) | 5.5 (1.9–12.1) | 8.9 (2.1–20.6) | 0.293 |
| Patients with > 400 mL BDR in FEV1 | 15 (18.1%) | 23 (20.0%) | 6 (12.8%) | 0.553 |
| Patients with ≥200 mL BDR in FEV1 | 41 (49.4%) | 46 (40.0%) | 20 (42.6%) | 0.415 |
| Patients with ≥12% BDR in FEV1 | 18 (21.7%) | 29 (25.2%) | 18 (38.3%) | 0.109 |
| Patients with ≥200 mL and 12% BDR in FEV1 | 18 (21.7%) | 29 (25.2%) | 17 (36.2%) | 0.187 |
Data is shown as n (%) or median (interquartile range). BDR bronchodilator response