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274,971 items of data are available, covering 274,971 participants. Defined-instances run from 0 to 0, labelled using Instancing 2. Units of measurement are percent.
Mean = 96.7855
Std.dev = 16.5731
193 items above graph maximum of 156.885
Counts of participants/items last updated 25 Jul 2021.
This value was only calculated for samples with non-missing predicted Forced Expiratory Volume in 1-second, using derived variables Force Expiratory Volume in 1-second (FEV1) and predicted Forced Expiratory Volume in 1-second (pred.FEV1). It is defined as the Force Expiratory Volume in 1-second divided by the Percent predicted Forced Expiratory Volume in 1-second multiplied by 100:
FEV1 /pred.FEV1 * 100
This derived data field has come from Professor Martin Tobin at the University of Leicester.