Fig. 1From: Favorable longitudinal change of lung function in patients with asthma-COPD overlap from a COPD cohortLongitudinal Changes in pre-bronchodilator forced expiratory volume in 1 s (mL) during the follow-up period in non-ACO COPD (n = 192) and ACO (n = 47). Error bar represents 95% confidence interval. ACO, asthma-chronic obstructive pulmonary disease overlap syndrome; COPD, chronic obstructive lung diseaseBack to article page