Figure 1
From: Incidence trends of airflow obstruction among European adults without asthma: a 20-year cohort study

Selection of the subjects at risk for AO. Pre-BD: pre-bronchodilator.
From: Incidence trends of airflow obstruction among European adults without asthma: a 20-year cohort study

Selection of the subjects at risk for AO. Pre-BD: pre-bronchodilator.