Imagine that in theory your ideal FVC(FEV6) should be 100 for simplicities sake then your minimum FEV1 should be 80 = 80% If your ideal should be 1000 then it would only be 8% -a far cry from the ideal FEV1!
As the FEV1 percentage given is of your 'actual' FVC then if that is only 20% of what it should be you're a lot worse than someone of the same age, gender and height whose FEV1 is 80% of their actual FVC.
SO - you also need to know how far from the ideal your FVC is for any comparison to be made with anyone else's.
My FEV1/FVC is between 25% - 35% of my ideal FVC but is 45% - 53% of my actual FVC.
I have been thinking about this for a few days to try and get my head round it.
Is my belief correct?
Sorry if this doesn't make sense, I know what I mean but am struggling to put it into the right wording.