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Very Mild Abnormal Pulmonary Function Test?

Hi there,

I'm a 32 y/o male who has never smoked, and lead an active lifestyle. I also have a history of chronic anxiety and nasal polyps for the past 5 years. Over the past six months, I have felt more "short of breath", which I started to notice a few weeks after having a pulmonary function test. I'm still able to work out, and the shortness of breath varies and I don't notice it when my attention is somewhere else, but I do notice it at rest. Also, to make a long story short, I had the pulmonary function test to rule out another medical cause, which was ruled out. However, my pulmonary function test was slightly abnormal and suggestive of mild COPD. My doctor consulted a pulmonologist regarding this result, and said that this could be normal, and might be just due to regular air pollution of living in a big city. I'm having a hard time accepting this, because there is a reason that they make these tests with normative ranges. However, I wanted to know if you see otherwise healthy individuals with a mild out of range PFT? I will give you the numbers so that you can see what I'm talking about:

FVC (L) 6.05, reference range 102%
FEV1 (L) 4.10, reference range 85%, post bronchodilator 88%
*FEV1/FVC (%) 68%, post bronchodilator 2.5mg albuterol 71%
FEV25-75% (L/sec) within LLN and ULN
TLC (L) 8.24, LLN/ULN (5.9-9.1), reference range 110%
ERV (L) 2.72 (1.5-2.3), reference range 142%
RV (L) 2.17 (1.0-2.6), reference range 120%
RV/TLC 26% (14.8-32.4)
DLCO 41.9 (24.1-40.7), ref 129%
DL adj 128%
DLCO/VA 83%
DL/VA adj 102%

As you can see, everything was normal except for a slightly low FEV1/FVC, and since it wasn't significantly reversible, this would classify me as having mild COPD.

If I am asymptomatic (no wheezing, coughing, phlegm production, and some shortness of breath likely related to anxiety), is this PFT concerning? Can this be a normal variant, or should I get another PFT or begin some type of medical treatment?

Thanks for your time!!!
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