| Baseline characteristics | Persistent current asthma | Intermittent current asthma |
| Children, n | 80 | 71 |
| Age, mean(sd) | 10.5 (2.2) | 11.1 (2.5) |
| Females, n(%) | 38 (47.5) | 22 (31.0)* |
| SPT, n(%) | 67 (88.2) | 66 (93.0) |
| FEV1%pred, m(sd) | 97.7 (14.2) | 97.6 (12.5) |
| Adults, n | 167 | 70 |
| Age, m(sd) | 39.1 (13.9) | 34.5 (13.0)* |
| Females, n(%) | 90 (53.9) | 42 (60.0) |
| SPT, n(%) | 115 (72.3) | 49 (71.0) |
| FEV1%pred, m(sd) | 83.4 (19.9) | 95.6 (13.8)* |
*p value<0.05