Relationship between a) forced expiratory flow at 25–75% of forced vital capacity (FVC) (FEF25–75%) and b) forced expiratory flow at 75% of FVC (FEF75%)

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Presentation transcript:

Relationship between a) forced expiratory flow at 25–75% of forced vital capacity (FVC) (FEF25–75%) and b) forced expiratory flow at 75% of FVC (FEF75%) and forced expiratory volume in 1 s (FEV1), both standardised for the FVC. Note that the y-axis is log-t... Relationship between a) forced expiratory flow at 25–75% of forced vital capacity (FVC) (FEF25–75%) and b) forced expiratory flow at 75% of FVC (FEF75%) and forced expiratory volume in 1 s (FEV1), both standardised for the FVC. Note that the y-axis is log-transformed. Philip H. Quanjer et al. Eur Respir J 2014;43:1051-1058 ©2014 by European Respiratory Society