My wife (Asian, 39) has GERD and seasonal allergies. This year she has had a persistent cough triggered by her allergies. She went for a PFT + methocholine challenge. The FEV1 showed 74% of pred, with only 3% improvement Post-Rx. The challenge test showed a drop of 22% in FEV1, leading to interpretation of airways hyperactivity. Also, the TLC showed 46%, leading to interpretation of severe restrictive defect.
However, even now, she can jog, has no breathing difficulty, works part-time, cares for 2 children without problem.
Can someone tell if the test was faulty, based on this information?
Also, is the 22% drop in FEV1 significant enough to warrant treatment.