Forced Expiratory Flow at 25–75% as a Marker for Airway Hyper Responsiveness in Adult Patients with Asthma-like Symptoms

The aim of the present study was threefold: to assess the association between baseline FEF25-75 and Airway Hyper-responsiveness (AHR), to specify whether a decrease in FEF25-75 may reflect severe hyper-responsiveness, and finally to confirm a FEF 25-75 cut-off value