Table 3.
Mean differences (SD) between the two test occasions (T1-T2) in lung function z-scores for all populations tested.
| n | z-FEV1 | z-FVC | z-FEV1/FVC | |
|---|---|---|---|---|
| Healthy | 593 | 0.07 (0.59) | 0.04 (0.58) | 0.07 (0.66) |
| Preterm/LBW | 63 | 0.01 (0.53) | 0.05 (0.48) | −0.08 (0.60) |
| Previous asthma | 37 | 0.05 (0.62) | 0.00 (0.57) | 0.08 (0.49) |
| Symptomatic | 65 | −0.04 (0.74) | −0.08 (0.63) | 0.07 (0.75) |
| ‘All Subjects’1 | 758 | 0.05 (0.60) | 0.03 (0.58) | 0.06 (0.66) |
Abbreviations: LBW: low birth weight.
1
‘All Subjects’ includes all children (i.e. healthy + preterm/LBW+ prior asthma) as well as those who were symptomatic on either test occasion.