I know there was a discussion not long ago about lung fuction tests, and somebody helpfully gave this link:
However, what I am still a little confused about is which numbers are variable and which are not?
I know peak flow goes up and down, but should the others?
My FEV1 has dropped by over 20% and the FVC by 10% on the last set of results from eight months ago. Does this matter, or is this just one of the those things, like peak flows varying day by day?
I do also have very mild bronchiectasis, so I'm inclined to worry about anything that might suggest irreversible progression.
What do others understand? Does FEV1/FVC go up and down in an asthmatic like the peak flow does?