Proportion of children meeting the reproducibility criteria with and without the use of a computer-animation program during the test
| With use of program | Without use of program | |||||||
| ≤5% | ≤7% | ≤10% | ≤100 mL | ≤5% | ≤7% | ≤10% | ≤100 mL | |
| Inexperienced children | ||||||||
| 4–5 yrs# | ||||||||
| FVC | 52.0 | 64.0 | 80.0 | 76.0 | 60.0 | 76.0 | 80.0 | 76.0 |
| FEV1 | 64.0 | 68.0 | 88.0 | 88.0 | 72.0 | 88.0 | 92.0 | 92.0 |
| PEF | 48.0 | 60.0 | 76.0 | 40.0 | 56.0 | 80.0 | ||
| 6–8 yrs¶ | ||||||||
| FVC | 75.0 | 81.3 | 93.8 | 75.0 | 62.5 | 87.5 | 93.8 | 81.3 |
| FEV1 | 75.0 | 81.3 | 87.5 | 75.0 | 68.8 | 93.8 | 93.8 | 93.8 |
| PEF | 56.3 | 75.0 | 87.5 | 50.0 | 62.5 | 31.3 | ||
| Experienced children | ||||||||
| 4–5 yrs+ | ||||||||
| FVC | 58.3 | 75.0 | 83.3 | 66.7 | 66.7 | 66.7 | 75.0 | 75.0 |
| FEV1 | 66.7 | 83.3 | 83.3 | 83.3 | 50.0 | 66.7 | 83.3 | 75.0 |
| PEF | 58.3 | 75.0 | 83.3 | 41.7 | 41.7 | 50.0 | ||
| 6–8 yrs§ | ||||||||
| FVC | 60.0 | 74.3 | 88.6 | 71.4 | 77.1 | 88.6 | 91.4 | 85.7 |
| FEV1 | 74.3 | 82.9 | 94.3 | 82.9 | 85.7 | 91.4 | 97.1 | 88.6 |
| PEF | 62.9 | 74.3 | 85.7 | 57.1 | 77.1 | 91.4 | ||
Different reproducibility criteria are considered: curves considered to be reproducible when differences between the two highest values are ≤5, ≤7, ≤10% and ≤100 mL
FVC: forced vital capacity
FEV1: forced expiratory volume in one second
PEF: peak expiratory flow
#: n=25
¶: n=16
+: n=12
§: n=35