I have had COPD for about 8 years. I had a peak flow meter reading for my COPD in June, which read 31%. I went for another lung function test a few weeks ago at the asma clinic, but got very contrasting results. I had the best of 3 test, for which my first attempt was 31%, the second, 51% and the third was again 31%. Can anyone tell me what this indicates, please - as I am aware that COPD is irreversible and cannot get any better and the goal is to try to stop its progression?