Assessment of bronchodilator responsiveness to salbutamol or ipratropium using different criteria in treatment-naïve patients with asthma and COPD

This is the authors' abstract. We don't add key points for this paper.

Background The criteria for significant bronchodilator responsiveness (BDR) were published in 2005 by the European Respiratory Society/American Thoracic Society, which were revised in 2021, however, data on the agreement between these two recommendations in untreated patients with airflow limitation are missing.