I recently had a PFT redone because the first one was abnormal. My levels improved in every area on the new test, except my FEF25-75, which had a value of 65. The pulmonologist did not seem concerned but wants me to redo the PFT in 3 months. I’m still worried after they mentioned COPD/airway obstruction the first go round. With a low FEF25-75, but all other normal numbers, is COPD still on the table? Any ideas what could cause this?