Table 2.
Clinical characteristics of the study population
| Cases (N=43) n(%) |
Controls (N=43) n(%) |
|
| Wheezing after exercise | 39(90.7) | 38(88.4) |
| Limitation of physical activity by asthma | 37(86) | 33(76.7) |
| Troublesome cough at night | 39 (90.7) | 36(87.7) |
| Pre-bronchodilator FEV1 | ||
| ≥80% (Normal) | 0 | 19 (44.2) |
| 60–79% (Mild Obstruction) | 5 (11.6) | 11 (25.6) |
| 40–59% (Mod. Obstruction) | 14 (32.6) | 7 (16.3) |
| <40% (Severe Obstruction) | 24 (55.8) | 6 (14.0) |
| Mean BMI ± SD | 22.6 ± 6.0 | 22.1 ± 4.8 |
| Mean number of attacks in the past 7 days ± SD | 5.2 ± 6.1 | 2.1 ± 2.8 |
| Mean number of nights with troublesome cough in the past 4 weeks ± SD |
14.5 ± 10.9 | 7.5 ± 7.2 |
| Mean Pre-bronchodilator FEV1± SD | 38.5 ± 16.2 | 69.3 ± 23.2 |