What does PEFR/FEV1 mean?

Looking for the full meaning of PEFR/FEV1? From the following image, you can find out all definitions of PEFR/FEV1. If you want, you can also download image file to print.

What does pefrfev1 stand for

AcronymDefinition
PEFR/FEV1Peak Expiratory Flow Rate/Forced Expiratory Volume in 1 Second