Morbidity and lung function parameters before and during the study
| Before study | During study | |||
| 1 yr | 2 yrs | 3 yrs | ||
| Time lost from work/school days | 5 (4–7) | 3.5 (0–12) | 0 (0–4.75) | 0 (0–3.75)***,# |
| Primary care visits n | 5 (4–7) | 2 (1–3) | 1 (0–2) | 1 (0–2)***’# |
| Emergency visits n | ||||
| Primary care | 1 (0–3) | 0 (0–0) | 0 (0–0) | 0 (0–0) |
| Acute care hospital | 1 (0–1) | 0 (0–0) | 0 (0–0) | 0 (0–0) |
| Hospitalisations n | 0 (0–0) | 0 (0–0) | 0 (0–0) | 0 (0–0) |
| Nocturnal awakenings n | 60 (24–225) | 10 (0–33) | 4 (0–11) | 0 (3–10)***,# |
| FEV1 % pred | 76.50 (64.75–85.50) | 81.50 (67.75–90) | 85 (70–94.50) | 85.50 (71.50–97)***,# |
| L | 2.200 (1.715–2.562) | 2.220 (1.805–2.715) | 2.450 (1.850–2.850) | 2.360 (1.885–2.282)***,# |
Data are presented as median (interquartile range)
FEV1: forced expiratory volume in one second
% pred: percentage of the predicted value
Comparison of all variables at the four time points were significant (p<0.001)
***: p<0.001 for comparison at 1, 2 and 3 yrs
#: p=ns for comparison at 2 and 3 yrs (Friedman one-way analysis of variance)