Assessment of Bronchodilator Responsiveness and Spirometric Patterns in Patients with Rhinitis and Suspected Asthma

Background: Bronchodilation testing (BDT) is routinely used to assess reversibility of airflow limitation. For patients with rhinitis who report asthma-related symptoms but often show preserved spirometry, the clinical patterns associated with bronchodilator responsiveness (BDR) are less clearly described. Understanding these patterns may help clinicians interpret lung function in real-world practice. Methods: improvements below the conventional ≥12% criterion and asthma-related symptoms. Results: improvements slightly below the conventional ≥12% bronchodilator threshold were also associated with asthma-related symptoms, although these findings were exploratory and not intended as diagnostic criteria. Conclusion: changes may be clinically relevant and warrant further prospective study. These findings may help clinicians judge when bronchodilation testing is informative during the routine evaluation of suspected airway disease.