Percentage of preschool children with a difference between the highest and second highest value of FEV1, FEV 0.5, FVC and PEF of ≤5% and 6–10% in children with at least three acceptable manoeuvres and those with two acceptable manoeuvres
| Lung function parameters | Difference between highest and second highest value (%) | ≥3 acceptable manoeuvres (n=408) | 2 acceptable manoeuvres (n=195) |
|---|---|---|---|
| FEV1, FEV0.5=forced expiratory volume in 1 or 0.5 seconds; FVC=forced vital capacity; PEF=peak expiratory flow. | |||
| *ERS criteria of reproducibility. | |||
| FEV1 | ≤5* | 63 | 43 |
| ≤10 | 91 | 64 | |
| FEV0.5 | ≤5* | 70 | 43 |
| ≤10 | 93 | 81 | |
| FVC | ≤5* | 55 | 40 |
| ≤10 | 83 | 67 | |
| PEF | ≤5 | 60 | 42 |
| ≤10* | 86 | 73 | |