Table 3

Percentage of preschool children with a difference of ≤5% and 6–10% between the highest and second highest value of FEV1, FEV 0.5, FVC, and PEF by age.

Percentage of children
Lung function parameterDifference between highest and second highest value (%)3 years (n=143)4 years (n=201)5 years (n=201)6 years (n=58)
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*45586164
≤1076859093
FEV0.5≤5*46646769
≤1076929398
FVC≤5*45554657
≤1073777786
PEF≤549576062
≤10*83828786