Entirely too much is being read into this… the spirometry is a joke.
You breathe in and then breathe out into the measuring device as hard and as fast as you can. The expected value is pretty much a joke, they look at the curve instead. If the fev1 is less than 70% of expected value they have someone who actually knows what they’re talking about look at the curve and the ratios to other measurements …
In meaningful context, the test was required to ensure that with long term use patients lung volume wasn’t significantly decreasing with afrezza use… which hasn’t turned out to be a thing…
For a screening, they told me they want to see an fev1 above 70% of expected to ensure it was “normal” and if it was below that they’d actually want the pulmonologist to examine you to rule out any issues, although normal healthy people do score low sometimes just due to anatomical differences…