Table 1.
Characteristics of participants with and without a positive EIB test, n = 140. Data are presented as n (%) or mean ± SD unless otherwise indicated
| EIB n = 49 | No EIB n = 91 | p-value | |
|---|---|---|---|
| Age (years), mean (min,max) | 14.3 (13,15) | 14.2 (13,15) | 0.31 |
| Female | 36 (73) | 48 (53) | 0.017 |
| BMI | 21.3 ± 2.8 | 20.8 ± 2.9 | 0.30 |
| Overweight and obesity | 6 (12) | 9 (10) | 0.67 |
| Exercise-induced dyspnoea | 42 (86) | 52 (57) | <0.001 |
| Ever asthmaa | 22 (45) | 18 (20) | 0.002 |
| Rhinitis | 17 (35) | 30 (33) | 0.84 |
| FVC% predictedb | 93 ± 11 | 95 ± 11 | 0.31 |
| FEV1 % predictedb | 90 ± 9 | 94 ± 11 | 0.049 |
| IgE sensitisation | 21 (43) | 41 (45) | 0.80 |
| Inhaled corticoid steroids | 14 (28.6) | 11 (12.1) | 0.015 |
| Short acting beta-2-agonist | 22 (44.9) | 22 (24.2) | 0.012 |
| Disturbed sleep | 9 (18.4) | 1 (1.1) | <0.001 |
| HAD | |||
| Anxiety, median (IQR) | 6 (5) | 4 (4) | 0.007 |
| Depression, median (IQR) | 2 (4) | 2 (3) | 0.78 |
EIB exercise-induced bronchoconstriction, BMI body mass index (kg/m2), HAD Hospital anxiety and depression scale
aSelf-reported, having ever been diagnosed by a physician as having asthma
bForced vital capacity (FVC) and FEV1 presented as percentage of predicted recorded at baseline before EIB test