Lower Airway Conditions Contribute to the Prediction of Polyp Recurrence in Chronic Rhinosinusitis With Nasal Polyps and Comorbid Asthma.

Duration of asthma, ratio of peak expiratory flow to predicted value, and ratio of maximal expiratory flow at 25% of the vital capacity to predicted value are independent risk factors for polyp recurrence in patients with CRSwNP+AS. A lower+upper model created with the ethmoid sinus score and the three lower airway factors shows good predictive value for polyp recurrence in patients with CRSwNP+AS.